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Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Kendra L. Russell, William J. Andrews, Vincent J. DiFrenna, J. Michael Norris, Robert R. Mason, V.J. DiFrenna · U.S. Geological Survey

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Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Open-File Report 2024–1022

U.S. Department of the Interior U.S. Geological Survey

Calendar for Report Year 2017 December 2016 T W T

4 11 18 25

5 12 19 26

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January 2017 3 4 51 11 12 10 18 17 19 26 24 25 27 28 31

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June 2017 T W T

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1 6 13 20 27

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July 2017 6 13 20 27

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April 2017 1 2 5 6

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May 2017 2 3 4 9 10 11

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October 2017

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Report of the River Master of the Delaware River for the Period December 1, 2016– November 30, 2017 By Kendra L. Russell, William J. Andrews, Vincent J. DiFrenna, J. Michael Norris, and Robert R. Mason, Jr.

Open-File Report 2024–1022

U.S. Department of the Interior U.S. Geological Survey

U.S. Geological Survey, Reston, Virginia: 2024

For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov or call 1–888–392–8545. For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov/ or contact the store at 1–888–275–8747. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Suggested citation: Russell, K.L., Andrews, W.J., DiFrenna, V.J., Norris, J.M., and Mason, R.R., Jr., 2024, Report of the River Master of the Delaware River for the period December 1, 2016–November 30, 2017: U.S. Geological Survey Open-File Report 2024–1022, 109 p., https://doi.org/10.3133/ofr20241022. ISSN 0196-1497 (print) ISSN 2331-1258 (online) ISBN 978–1–4113–4580–5

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River Master Letter of Transmittal and Special Report Office of the Delaware River Master U.S. Geological Survey 415 National Center Reston, VA 20192 July 24, 2024 The Honorable John G. Roberts, Jr. Chief Justice of the United States The Honorable John Carney Governor of Delaware The Honorable Phil Murphy Governor of New Jersey The Honorable Kathy Hochul Governor of New York The Honorable Josh Shapiro Governor of Pennsylvania The Honorable Eric Adams Mayor of the City of New York No. 5, Original—October Term, 1950 State of New Jersey, Complainant, v. State of New York and City of New York, Defendants, Commonwealth of Pennsylvania and State of Delaware, Intervenors.

To the Chief Justice of the United States: For the record, and in compliance with the provisions of the Amended Decree of the Supreme Court of the United States entered June 7, 1954, I hereby transmit the 64th Annual Report of the River Master of the Delaware River for December 1, 2016, to November 30, 2017. In this report, this period is referred to as the River Master “report year.” During the 2017 River Master report year, monthly precipitation in the upper Delaware River Basin ranged from 30 percent of the long-term average in November 2017 to 167 percent of the long-term average in October 2017. Precipitation from December to May, when reservoirs typically refill, was 23.37 inches. Precipitation was below normal in December, June, September, and November and above normal in the other 8 months. When the report year began on December 1, 2016, combined useable storage in the New York City reservoirs in the upper Delaware River Basin was 110.115 billion gallons or 40.7 percent of combined storage capacity. The reservoirs were at about 100 percent of useable capacity on May 31, 2017. The combined usable storage was 193.463 billion gallons (71.4 percent of storage at spillway levels) at the end of the report year on November 30, 2017. A lower basin drought watch issued by the Delaware River Basin Commission (DRBC) extended from the beginning of the report year to January 18, 2017. The drought watch was ended due to increased precipitation during December 2016. During the report year, operations in the basin were conducted as stipulated by the Decree and the 2016 and 2017 Flexible Flow Management Programs (FFMPs). During the report year, the following individuals served as members of the Advisory Committee: Decree Party affiliation

Committee member

Delaware

David Wunsch

New Jersey

Daniel Kennedy

New York

Mark Klotz

New York City

Paul Rush

Pennsylvania

Kelly Heffner and Lisa Daniels

In addition to the management of releases from the New York City-owned reservoirs and streamflow in the upper Delaware River Basin, an issue of particular interest to the River Master was the expiration of the 2016 FFMP on May 31, 2017. Upon expiration of the FFMP without a unanimously approved successor agreement to guide River Master operations, requirements for flow targets and diversions reverted to those specified by the Decree, and reservoir conservation release requirements reverted to the lower flows established by provisions in the Delaware River Basin Commission (DRBC) Docket No. D–77–20 CP (Revised). The Montague flow target continued as 1,750 cubic feet per second (ft3/s), and, beginning June 15—as specified by the Decree (paragraph III–B–1 (d))— was increased to incorporate the excess quantity based on data provided by New York City. As required by the Decree (paragraph III–B–1 (c)), New York City estimated its anticipated consumption of water from all sources during 2017 as 597.676 billion gallons, and the safe yield from all sources obtainable without pumping as 607.725 billion gallons. The excess release quantity was computed as 8.341 billion gallons, and the excess release rate was computed as 108 ft3/s. The increased Montague flow target was set as 1,858 ft3/s from June 15, 2017, to March 15, 2018, or until the excess release quantity was reached, and 1,750 ft3/s thereafter, absent a new FFMP. While the reservoir conservation release requirements reverted to lesser flows established by provisions included in DRBC Docket No. D–77–20 CP (Revised), New York City, at its discretion,

continued a program of releases consistent with the 2016 FFMP conservation release requirements through September 5, 2017, when it began ramping down the conservation releases to those required of DRBC Docket No. D–77–20 CP (Revised). Throughout the summer of 2017, the Decree Party Principals, aided by the River Master and staff from the DRBC, continued efforts to draft a new FFMP. Those discussions resulted in a proposed 10-year, two-part agreement. The advisory committee, staff of the DRBC, and the River Master met on September 5, 2017, to finalize the draft. The draft was briefed to the DRBC Regulated Flow Advisory Committee by the River Master at a public meeting in Trenton, New Jersey (N.J.), on September 28, 2017. Subsequently, the Decree Parties signed the new FFMP for 2017 (FFMP2017), which went into effect on October 23, 2017. Upon approval of the FFMP2017, releases of the excess release quantity terminated, the Montague flow target reverted to 1,750 ft3/s, and the reservoir conservation release requirements were set to levels required in the FFMP2017. The FFMP2017 expires May 31, 2023, or, pending successful execution of some of its various provisions, May 31, 2028. River Master operations were executed through the U.S. Geological Survey (USGS) Office of the Delaware River Master (ODRM) in Milford, Pennsylvania. Robert R. Mason, Jr., the Delaware River Master, was in charge of the office and was assisted by hydrologist Vincent DiFrenna. During the year, the ODRM continued the weekly distribution of a summary hydrologic report. These reports contain provisional data on precipitation in the upper Delaware River Basin, releases and spills from the New York City reservoirs to the Delaware River, diversions to the New York City water supply system, reservoir contents, daily segregation of flow of the Delaware River at the USGS streamgaging site at Montague, N.J., and diversions by the State of New Jersey. The reports were distributed to members of the Advisory Committee and other parties interested in Delaware River operations. A monthly summary of hydrologic conditions was also provided to Advisory Committee members. The weekly hydrologic reports are available through the ODRM website (https://webapps.usgs.gov/odrm/data/data.html). The first section of this report documents Delaware River operations during the report year. During the year, New York City diverted 184.156 billion gallons from the Delaware River Basin and released 133.710 billion gallons from the Pepacton, Cannonsville, and Neversink Reservoirs to the Delaware River. A total of 67.096 billion gallons was spilled from the Pepacton, Cannonsville, and Neversink Reservoirs. The ODRM directed releases from these reservoirs to the Delaware River that totaled 28.815 billion gallons. The second section of this report describes water quality at various monitoring sites on the Delaware River estuary and includes basic data on chemical properties and the physical characteristics of the water and presents summary statistics. Throughout the year, diversions to New York City’s water supply system and releases designed to maintain the flow of the Delaware River at the Montague site were made as directed by the ODRM. Diversions by New York City from its reservoirs in the Delaware River Basin did not exceed the limits stipulated by the Decree. Diversions by the State of New Jersey were also within stipulated limits. The River Master and staff are grateful for the continued cooperation and support of the Decree Parties. Also, the contributions of Brookfield Renewable U.S. and Eagle Creek Renewable Energy, LLC, in informing the ODRM of plans for power generation and providing data on reservoir releases and elevations are greatly appreciated. Sincerely yours, /Signed/ Kendra Russell, P.E. Delaware River Master

Acknowledgments The Office of the Delaware River Master’s (ODRM) daily operation records were prepared from hydrologic data collected daily. Data for these records were collected and computed by the ODRM or provided by the following agencies and utilities. Data for streamflow of the Delaware River at Montague, New Jersey, and other locations and tributaries were provided by the U.S. Geological Survey (USGS). Data for the Pepacton, Cannonsville, and Neversink Reservoirs were provided by the New York City Department of Environmental Protection. Data for Lake Wallenpaupack were provided by Brookfield Renewable U.S. Data for Rio Reservoir were provided by Eagle Creek Renewable Energy, LLC. The National Weather Service offices in Binghamton, New York, and State College, Pennsylvania, provided quantitative precipitation forecasts and some precipitation data. Amy Shallcross of the Delaware River Basin Commission provided information about 2017 activities, including the lower basin drought watch. Amy McHugh of the USGS contributed to this report by collecting, organizing, and reviewing data.

vii

Contents Acknowledgments��vi Executive Summary��1 Introduction��1 Method to Determine Directed Releases From New York City Reservoirs��4 Segregating Streamflow Components—Delaware River at Montague, New Jersey��4 Forecasting Streamflow—Delaware River at Montague, New Jersey��4 Hydrologic Conditions��5 Precipitation��5 Reservoir Storage��5 Operations��6 Diversions to New York City Water Supply��6 Diversions by New Jersey��7 Montague Flow Objective��7 Excess Release Quantity and Interim Excess Release Quantity��8 Tailwaters Habitat Protection and Discharge Mitigation Program��8 Comparison of River Master Operations Data With Other Records��9 Analysis of Forecasts��9 Releases From New York City Reservoirs��10 Delaware River at Montague, New Jersey��11 Conformance of Operations Under the Amended Decree of the Supreme Court of the United States Entered June 7, 1954��11 Quality of Water in the Delaware River Estuary��11 Water-Quality Monitoring Programs��14 U.S. Geological Survey Continuous Water-Quality Monitoring Program��14 Delaware River Estuary Boat Run Monitoring Program��14 Water Quality During the 2017 Report Year��14 Streamflow��14 Water Temperature��14 Specific Conductance and Chloride��15 Dissolved Oxygen��16 Hydrogen-Ion Activity (pH)��16 Tables 1, 3–11, and 13–20��19 References Cited��60 Glossary��62 Appendix 1. Four-Party Letter for Interim Operations��66 Appendix 2. Agreement For a Flexible Flow Management Program��69

Figures 1. 2.

Map showing the Delaware River Basin upstream from Wilmington, Delaware��3 Graph showing rule curves and actual stored water for New York City reservoirs in the Delaware River Basin from December 1, 2016, to November 30, 2017��6

viii

6. 7.

Graph showing flow components—uncontrolled runoff, powerplant reservoirs, and New York City reservoirs—for the Delaware River at Montague, New Jersey, August 1–October 31, 2017��9 Hydrographs of computed and forecasted uncontrolled runoff components, Delaware River at Montague, New Jersey (U.S. Geological Survey site number 01460440), from August 7 to October 31, 2017��11 Graphs (A–C) showing New York City-measured mean flow, in cubic feet per second, compared with computed mean flow records for U.S. Geological Survey (USGS) streamgaging sites downstream from their respective reservoirs��12 Map showing location of water-quality monitoring sites on the Delaware River estuary��13 Bar chart showing monthly average water temperatures in 2017 and long-term average monthly water temperatures from 1964 to 2016, for April through November, in the Delaware River estuary at Benjamin Franklin Bridge at Philadelphia, Pennsylvania��15 Graphs (A, B) showing the daily mean and minimum daily mean dissolved-oxygen concentrations averaged for July–September annually at two U.S. Geological Survey streamgaging sites on the Delaware River estuary, 1965–2017��17 Graphs (A, B) showing percent distribution of quarter-hourly dissolved-oxygen concentrations at two U.S. Geological Survey streamgaging sites on the Delaware River estuary, from July to September 2017��18

Tables 1. 2. 3. 4. 5. 6. 7. 8.

9. 10.

11.

12.

Precipitation in the Delaware River Basin upstream from Montague, New Jersey��19 Elevation and capacities of structures of the Pepacton, Cannonsville, and Neversink Reservoirs��5 Storage in Pepacton Reservoir, New York, for report year ending November 30, 2017��20 Storage in Cannonsville Reservoir, New York, for report year ending November 30, 2017��21 Storage in Neversink Reservoir, New York, for year ending November 30, 2017��22 Diversions to New York City water supply system for report year ending November 30, 2017��23 Consumption of Water by New York City, 1950–2017��29 Diversions by New Jersey, daily mean discharge, Delaware and Raritan Canal at Port Mercer, New Jersey (U.S. Geological Survey site number 01460440), for year ending November 30, 2017��31 New York City reservoir release design data for report year ending November 30, 2017��32 Controlled releases from reservoirs in the upper Delaware River Basin and segregation of flow of Delaware River at Montague, New Jersey, for report year ending November 30, 2017��36 Daily mean discharge of the Delaware River at Montague, New Jersey (U.S. Geological Survey site number 01438500), for report year ending November 30, 2017��51 Cumulative forecasted and actual release volume from Lake Wallenpaupack, Rio Reservoir, and uncontrolled runoff from August 7 to October 31, 2017��10

13.

14.

15.

16. 17.

18.

19.

20.

Daily mean discharge of the East Branch Delaware River at Downsville, New York (U.S. Geological Survey site number 01417000), for report year ending November 30, 2017��52 Daily mean discharge, West Branch Delaware River at Stilesvillle, New York (U.S. Geological Survey site number 01425000), for report year ending November 30, 2017��53 Daily mean discharge, Neversink River at Town of Neversink, New York (U.S. Geological Survey site number 01436000), for report year ending November 30, 2017��54 Daily mean discharge, Delaware River at Trenton, New Jersey (U.S. Geological Survey site number 01463500), for report year ending November 30, 2017��55 Daily maximum and minimum specific conductance, Delaware River at Reedy Island Jetty, Delaware (site number 01482800), for report year ending November 30, 2017��56 Daily maximum and minimum chloride concentrations, Delaware River at Chester, Pennsylvania (site number 01477050), for report year ending November 30, 2017��57 Daily mean dissolved-oxygen concentration, Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (site number 01467200), April 1 to November 30, 2017��58 Daily mean dissolved-oxygen concentration, Delaware at Chester, Pennsylvania (site number 01477050), April 1 to November 30, 2017��59

Conversion Factors U.S. customary units to International System of Units

Multiply

To obtain

Length inch (in.)

2.54

centimeter (cm)

foot (ft)

0.3048

meter (m)

mile (mi)

1.609

kilometer (km)

Area square mile (mi2) square mile (mi2)

259.0 2.590

hectare (ha) square kilometer (km2)

Volume million gallons (Mgal) billion gallons cubic foot per second accumulated daily ([ft3/s]-d) cubic foot per second (ft3/s)

3,785 3.785 2,447

cubic meter (m3) cubic hectometer (hm3) cubic meter per second accumulated daily ([m3/s]-d)

0.02832 cubic meter per second (m3/s) Flow rate

million gallons per day (Mgal/d)

0.04381 cubic meter per second (m3/s)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as °F = (1.8 × °C) + 32.

Datums Vertical coordinate information is referenced to the Bureau of Water Supply (BWS) datum, which was established by the New York City Department of Environmental Protection, Bureau of Water Supply. Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83). Elevation, as used in this report, refers to distance above the vertical datum.

Supplemental Information Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C). Concentrations of chemical constituents in water are given in milligrams per liter (mg/L).

Abbreviations BWS

Bureau of Water Supply

Del. Delaware DRBC

Delaware River Basin Commission

FFMP

Flexible Flow Management Program

FFMP2017

2017 Flexible Flow Management Program

ft foot ft3/s

cubic foot per second

(ft3/s)-d

cubic foot per second accumulated daily

IERQ

Interim Excess Release Quantity

in. inch Mgal

million gallons

Mgal/d

million gallons per day

mg/L

milligram per liter

mi mile mi2

square mile

NAD 83

North American Datum of 1983

N.J.

New Jersey

N.Y.

New York

NYCDEP

New York City Department of Environmental Protection

NWIS

National Water Information System [database]

ODRM

Office of the Delaware River Master

OST

Operational Support Tool

Pa. Pennsylvania THPDMP

Tailwaters Habitat Protection and Discharge Mitigation Program

USGS

U.S. Geological Survey

µS/cm at 25 °C

microsiemens per centimeter at 25 degrees Celsius

Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 By Kendra L. Russell,1 William J. Andrews,1 Vincent J. DiFrenna,1 J. Michael Norris,2 and Robert R. Mason, Jr.2

Executive Summary A Decree of the Supreme Court of the United States, entered June 7, 1954 (New Jersey v. New York, 347 U.S. 995), established the position of Delaware River Master within the U.S. Geological Survey. In addition, the Decree authorizes the diversion of water from the Delaware River Basin and requires compensating releases from certain reservoirs owned by New York City be made under the supervision and direction of the River Master. The Decree stipulates that the River Master provide reports to the Court, not less frequently than annually. This report is the 64th annual report of the River Master of the Delaware River. The report covers the 2017 River Master report year, from December 1, 2016, to November 30, 2017. During the report year, precipitation in the upper Delaware River Basin was 47.85 inches or 108 percent of the long-term average. On December 1, 2016, combined useable storage in the New York City reservoirs in the upper Delaware River Basin was 110.115 billion gallons or 40.7 percent of combined storage capacity, the lowest combined storage of the 2017 report year. The reservoirs were at about 100 percent of useable capacity on May 31, 2017. Combined storage remained above 80 percent of combined capacity until September 2017. A lower basin drought watch issued by the Delaware River Basin Commission in 2016 extended from the beginning of this report year to January 18, 2017. The drought watch was ended on January 18, 2017, due to increased precipitation in December 2016. River Master operations during the year were conducted as stipulated by the Decree and the Flexible Flow Management Programs. Diversions from the Delaware River Basin by New York City and New Jersey fully complied with the Decree. Reservoir releases were made as directed by the River Master at rates designed to meet the flow objective for the Delaware River at Montague, New Jersey (N.J.), on 52 days during the report year. Interim Excess Release Quantity and conservation releases, designed to relieve thermal stress and protect the fishery and aquatic habitat 1U.S. Geological Survey. 2U.S. Geological Survey, retired.

in the tailwaters of the reservoirs, were made during the report year. Excess Release Quantity and Interim Excess Release Quantity Bank releases were also made during the report year. The water quality in the Delaware River estuary between the streamgages at Trenton, N.J., and Reedy Island Jetty, Delaware, was monitored at various locations. The data on water temperature, specific conductance, dissolved oxygen, and pH were collected continuously by electronic instruments at four sites.

Introduction An amended Decree of the Supreme Court of the United States entered June 7, 1954 (New Jersey v. New York, 347 U.S. 995; available at https://webapps.usgs.gov/odrm/ about/decree), which superseded a 1931 Decree, authorizes the diversion of water from the Delaware River Basin and provides for releases of water from three New York City reservoirs—Pepacton, Cannonsville, and Neversink—to the upper Delaware River. The Decree stipulates that these diversions and releases be made under the supervision and direction of the Office of the Delaware River Master (ODRM). The Decree also stipulates that reports on Delaware River operations be made to the Court not less frequently than annually. The reports can be accessed at https://webapps.usgs.gov/ odrm/publications/publications. This report documents operations from December 1, 2016, to November 30, 2017, or the 2017 River Master report year, hereafter referred to as the “report year.” This report also presents information on water quality in the Delaware River estuary during the report year. Since 2007, the Decree Parties (Delaware, New Jersey, New York, New York City, and Pennsylvania) have unanimously approved a series of Flexible Flow Management Program (FFMP) agreements (available at https://webapps.usgs.gov/odrm/ffmp/flexible-flow- management-program) to manage the shared waters of the Delaware River Basin. The June 1, 2016, FFMP was an extension of the June 1, 2011, Agreement and incorporates

2 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 the edits from the previous four extensions of the 2011 Agreement (2012–16), with no additional program modifications other than dates (Russell and others, 2024). On May 31, 2017, the 2016 FFMP expired without a unanimously approved successor agreement to guide ODRM operations. Upon the expiration of the 2016 FFMP, operational requirements for flow targets and diversions reverted to those specified by the Decree, and reservoir conservation releases reverted to the lower flows established by provisions included in Delaware River Basin Commission (DRBC) Docket No. D–77–20 CP (Revised) (DRBC, 2023). Under the Decree, the Montague flow target continued as 1,750 cubic feet per second (ft3/s) and, beginning June 15, 2017, as specified by the Decree (paragraph III–B–1 (d)), was increased to incorporate the excess quantity based on data provided by New York City. As required by the Decree (Paragraph III–B–1 (c)), New York City estimated its anticipated consumption of water from all sources during the 2017 report year as 597.676 billion gallons, and the safe yield from all sources obtainable without pumping as 607.725 billion gallons (Paul V. Rush, New York City Department of Environmental Protection [NYCDEP], written commun., 2017). The excess release quantity was computed as 8.341 billion gallons, and the excess release rate, based on a release spanning 120 days, was computed as 108 ft3/s. The increased Montague flow target was set as 1,858 ft3/s from June 15, 2017, to March 15, 2018, or until the accumulated excess release quantity was reached, and 1,750 ft3/s thereafter, absent a new FFMP. When the reservoir conservation release requirements reverted to the lesser flows established by provisions of DRBC Docket No. D–77–20 CP (Revised), New York City, at its discretion, continued a program of releases consistent with the 2016 FFMP conservation release requirements (app. 1) through September 5, 2017, when it began ramping down the conservation releases to those required under DRBC Docket No. D–77–20 CP (Revised) (DRBC, 2023). Throughout the summer of 2017, the Decree party principals, aided by the ODRM and the DRBC, continued efforts to draft a new FFMP. Those discussions resulted in a proposed 10-year, two-part agreement. The advisory committee, staff of the DRBC, and the ODRM met on September 5, 2017, to finalize the draft. The draft was briefed

to the DRBC Regulated Flow Advisory Committee by the River Master at a public meeting in Trenton, New Jersey (N.J.) on September 28, 2017. Subsequently, the new FFMP for 2017 (FFMP2017; app. 2) was signed by all Decree Parties by October 23, 2017. Upon approval of the FFMP2017, release of the excess release quantity was terminated, the Montague flow target reverted to 1,750 ft3/s, and the reservoir conservation release requirements were set to the levels required in FFMP2017 (which were the same as those established in the 2016 FFMP). FFMP2017 expires on May 31, 2023, or, pending successful execution of some of its provisions, on May 31, 2028. Some hydrologic data in this report are records of streamflow and water quality data collected at U.S. Geological Survey (USGS) water-quality streamgages. The USGS collected and computed these data in cooperation with the States of New York and New Jersey, the Commonwealth of Pennsylvania, and the City of New York. The locations of major streams and reservoirs, and selected USGS streamgaging sites in the Delaware River Basin, are shown in figure 1.

Method to Determine Directed Releases From New York City Reservoirs The data and computations of the various streamflow components form the operational record used by the ODRM to carry out specific responsibilities related to the Montague flow objective (app. 2). The operational record has two parts: (1) segregating the streamflow components of the current daily mean discharge at the USGS streamgage at Montague, N.J. (site number 01438500), to compute the uncontrolled runoff and (2) forecasting the uncontrolled runoff and using forecasted information from other sources to predict the flow at the Montague site with adequate advance time to direct releases. The forecasting process determines whether the ODRM directs the New York City reservoirs to release water to maintain, at a minimum, the Montague flow objective at the Montague site, which is defined in table 1 of appendix 2.

Introduction 3 76° Map area

75°

Delaware Bay

EXPLANATION Delaware River Basin boundary

Roundout Reservoir Dela

Neversink

Tusten Hawley Shohola

Lake Wallenpaupack

Key gaging station

war

q u ed uct

Mongaup Reservoir Rio Reservoir Port Jervis

Milford

Montague #

Francis E. Walter Reservoir

City

Neversink Tunnel

Callicoon

Equinunk

General Edgar Jadwin Reservoir Prompton Reservoir Lackawaxen River

Index gaging station

East Delaware Tunnel

River

42°

Beaver Kill

Downsville # West De laware Tunne l Deposit # Stilesville Cooks Neversink Falls Reservoir

ATLANTIC OCEAN

NEW YORK

Pepacton Reservoir

Hudson

East Branch Delaware River

West Branch Delaware River Cannonsville Reservoir

MA NY

74°

Lake Hopatcong Beltzville Lake Leh i

Merrill Creek Delaware and Raritan canal Reservoir

r ve Ri

41°

NEW JERSEY

PENNSYLVANIA

# Kingston # Port Mercer

Blue Marsh Lake

Trenton #

Schuylkill R ive r

r ive

aw a

Trenton

Bra n

Philadelphia

wi n

ek re

Wilmington 40°

MARYLAND Base from U.S. Geological Survey digital data, 1:1,000,000 Albers Equal-Area Conic projection North American Datum of 1983

DELAWARE 0 0

10 10

20 MILES 20 KILOMETERS

Figure 1. Map showing the Delaware River Basin upstream from Wilmington, Delaware. The Delaware River Basin boundary is shown along with “key gaging stations” and “index gaging stations;” refer to the “Glossary” section for definitions.

4 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Segregating Streamflow Components— Delaware River at Montague, New Jersey

Forecasting Streamflow—Delaware River at Montague, New Jersey

The segregation of streamflow at the Montague site involves determining flow components, including releases from the New York City reservoirs, releases from Lake Wallenpaupack and Rio Reservoir for hydroelectric power generation, and uncontrolled runoff. For the segregation of components of daily mean flow at the Montague site, the following data are used:

The releases from New York City’s reservoirs necessary for meeting the Montague flow objective were computed based on the forecasted streamflow at the Montague site, exclusive of releases from New York City’s Delaware River Basin reservoirs. The flow must be forecast 3 days in advance to account for the longest traveltime needed for the flow to reach the Montague site from the New York City reservoirs. The electric utilities Brookfield Renewable U.S. and Eagle Creek Renewable Energy, LLC, provided daily forecasts of power generation and releases to the Delaware River from Lake Wallenpaupack and Rio Reservoir, respectively, to the ODRM. Because the hydroelectric powerplants were primarily used for meeting rapidly varying peak power demands, the forecasts were subject to various modifying factors, including the vagaries of weather on electricity demand. In addition, because the power companies are members of regional transmission organizations, demands for power outside of the local service area can unexpectedly affect powergeneration schedules. Consequently, the actual use of water for power generation can differ from the forecasts used in the design of reservoir releases. For computational purposes during periods of low flow, estimates of uncontrolled runoff at the Montague site were treated as two components: (1) current runoff and (2) forecasted runoff from precipitation. An estimate of uncontrolled runoff was computed using a recession procedure. A recession curve of uncontrolled inputs was developed using the discharge at the Montague site and is used to forecast the uncontrolled portion of flow at the Montague site 3 days in advance. Forecasted runoff was determined from data provided by the National Weather Service office in Binghamton, New York (N.Y.), which provided quantitative forecasts of average precipitation and air temperatures for the 3,480-square-mile (mi2) drainage basin upstream from Montague, N.J. During winter, runoff was estimated based on the status of snow and ice, along with forecasted precipitation and temperature. During other periods, forecasted precipitation was used to estimate runoff. The forecasted flow at the Montague site, exclusive of releases from New York City’s Delaware River Basin reservoirs, is computed as the sum of forecasted releases from hydroelectric power reservoirs, estimated uncontrolled runoff (including conservation releases from Rio Reservoir), and estimated runoff from predicted rainfall. Each of these inputs is adjusted for traveltime. If the computed total flow is less than the Montague flow objective, the deficiency comprises releases from New York City’s reservoirs, as directed by the ODRM. The balancing adjustment is applied to the following day’s release design based on the previous day’s provisional data. The balancing adjustment is computed as 10 percent of the difference between the cumulative directed release and the cumulative directed release required for exact forecasting and is limited to a maximum of 50 ft3/s magnitude. The balancing adjustment calls for more water to be released when previous

1. controlled releases from the Pepacton, Cannonsville, and Neversink Reservoirs of New York City; 2. controlled releases from Lake Wallenpaupack on Wallenpaupack Creek to produce hydroelectric power; and 3. controlled releases from Rio Reservoir on the Mongaup River to produce hydroelectric power. To determine the contributions of each of these releases, the amount of time it takes the water to travel from the release point to the USGS streamgage at the Montague site is required. The traveltimes are used to determine the appropriate time-delayed flow contributions from the previously named sources. The time-adjusted controlled flows of these sources are subtracted from the total streamflow measured at the Montague site to determine the uncontrolled runoff (including reservoir spills and groundwater) from the drainage area upstream from the Montague site. The traveltimes were computed from the reservoir and powerplant operations data and historical streamflow records. The traveltimes are adequate for ODRM operations. Occasionally, however, significant exceptions are observed. For example, during a large increase in a directed release from the Cannonsville Reservoir, the arrival time of the water at the Montague site can be delayed as long as 1.5 days because a substantial amount of water must first fill the channel before a steady flow arrives at the Montague site. During winter, ice formation and lower streamflow gradually increase the resistance to water flow, resulting in increased traveltimes. Because ice-affected traveltimes increase gradually across several days and releases were not directed to meet the Montague flow objective during periods of ice, no adjustments were made to compensate for these increased traveltimes during the report year. The following list gives the average times for the effective travel of water from the various sources of controlled supply to the Montague site. These traveltimes, in hours, were used for flow routing during the 2017 report year: Pepacton Reservoir, 60; Cannonsville Reservoir, 48; Neversink Reservoir, 33; Lake Wallenpaupack, 24; and Rio Reservoir, 8. The traveltime used for Lake Wallenpaupack controlled releases, in 2016, changed from 16 hours to 24 hours based on data from Brookfield Renewable U.S.

Hydrologic Conditions 5 directed releases (or a lack of releases) were insufficient to meet the Montague flow objective. The adjustment calls for less water to be released when previous directed releases were higher than required to meet the Montague flow objective. When updated forecasts of precipitation or powerplant releases showed significant changes after a release was directed, the release required from New York City’s reservoirs was recomputed based on updated forecasts. Commonly, this procedure resulted in a reduced release requirement for the New York City reservoirs that day. Only the final values for releases from the New York City reservoirs are presented in this report.

Reservoir Storage Table 2 summarizes the “point of maximum depletion” and other pertinent levels and contents of the Pepacton, Cannonsville, and Neversink Reservoirs. This information was provided by the NYCDEP. Daily storage in the Pepacton, Cannonsville, and Neversink Reservoirs, above the point of maximum depletion or minimum full-operating level, is given in tables 3, 4, and 5 (all in back of report), respectively, and combined storage during the report year is shown in figure 2. On December 1, 2016, combined useable storage in the three reservoirs was 110.115 billion gallons or 40.7 percent of combined capacity. From December to May, inflow to the New York City reservoirs typically exceeds outflow, consequently increasing storage. Combined storage increased during the first half of the report year, and the reservoirs were at about 100 percent of usable capacity on May 31, 2017. Combined storage remained high (above 80 percent combined capacity) until September 2017. The lowest combined storage was 110.115 billion gallons (40.7 percent) on December 1, 2016. The three reservoirs spilled a total of 67.096 billion gallons during the year when reservoirs reached maximum capacity. The Pepacton Reservoir spilled during the following periods: April 6–15, 2017; April 23–26, 2017; May 1–23, 2017; May 27, 2017; May 30– June 2, 2017; June 5–12, 2017; and June 19–20, 2017. The Cannonsville Reservoir spilled during the following periods: April 4–29, 2017; and May 1–June 12, 2017. The Neversink Reservoir spilled during the following periods: April 6–14, 2017; April 25–26, 2017; May 4–7, 2017; May 11–16, 2017; May 29–30, 2017; June 1–13, 2017; and June 19–20, 2017. The combined storage reached a maximum for the report year on April 8, 2017, at 278.287 billion gallons. The reservoirs’ storage decreased from that point, and the combined storage was 193.463 billion gallons (71.43 percent of combined capacity) on November 30, 2017.

Hydrologic Conditions Precipitation The sum of the average monthly precipitation in the Delaware River Basin upstream from Montague, N.J., was 47.85 inches (in.) during the 2017 report year and was 108 percent of the long-term (76-year) average (table 1, in back of report). Monthly precipitation ranged from 30 percent of the long-term average in November 2017 to 167 percent of the long-term average in October 2017 (table 1). Precipitation data for the report year were computed from records from eight geographically distributed stations operated by the National Weather Service; the New York City Department of Environmental Protection (NYCDEP) Bureau of Water Supply; and the ODRM. The seasonal period from December to May is typically when surface-water and groundwater reservoirs refill. During this period for 2016–2017, total precipitation was 23.37 in., which is 115 percent of the 76-year long-term average. During the June–November period, total precipitation was 24.48 in., which is about 102 percent of the 76-year long-term average.

Table 2. Elevation and capacities of structures of the Pepacton, Cannonsville, and Neversink Reservoirs. [ft, foot; Mgal, million gallons; —, not applicable]

Level Full pool or spillway crest

Pepacton Reservoir Elevation

Content

1,280

—

Point of maximum depletion Sill of diversion tunnel Sill of river outlet tunnel Dead storage

Cannonsville Reservoir

Neversink Reservoir

Elevation

Content

1,150

—

1,152

1140,190

1,143

23,511

Content

1,440

—

1,040

195,706

1,319

134,941

31,035

21,020

1,314

2525

1,126.50

44,200

1,020.5

41,564

1,314

—

1,800

—

328

—

1,680

1This quantity is stored between the full pool or spillway crest and the point of maximum depletion. 2This quantity is stored between the point of maximum depletion and the sill of the diversion tunnel. 3This elevation is at the mouth of the inlet channel of the diversion works. 4This quantity is stored between the sill of the diversion tunnel and the sill of the river outlet tunnel.

6 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 300

Full capacity usable storage

Spill mitigation (L1)

Combined reservoir storage, in billion gallons

250

Normal (L2) Drought watch (L3)

200

Actual contents Drought warning (L4)

150

100

Drought emergency (L5) 50

0 Dec. 1

Jan. 20

Mar. 11

Apr. 30

2016

June 19

Aug. 8

Sept. 27

Nov. 16

2017

Figure 2. Graph showing rule curves and actual stored water for New York City reservoirs in the Delaware River Basin from December 1, 2016, to November 30, 2017. Full capacity usable storage line and the five conservation release rate zones (L1–5) are shown. The conservation release rate zones are defined in the “conservation release” definition in the “Glossary” section.

Operations Operations from December 1, 2016, through November 30, 2017, were conducted as described by the FFMPs (revised, effective June 1, 2016–May 31, 2017, and October 23, 2017–November 30, 2017), and interim operations absent a signed FFMP as defined by DRBC Docket No. D–77–20 CP (Revised) (DRBC, 2023). The allowable diversion to New York City was 800 million gallons per day (Mgal/d) throughout the year. The allowable diversion to New Jersey was 100 Mgal/d monthly, with an average not exceeding 120 Mgal/d. The DRBC issued a lower basin drought watch on November 23, 2016, for the portion of the watershed downstream from Montague, N.J. (DRBC, 2016). During the drought watch, the Trenton flow objective was decreased from 3,000 ft3/s to 2,700 ft3/s. The Montague flow objective was reduced to 1,650 ft3/s on December 1, 2016, and remained so until January 18, 2017, when the drought watch was ended. Increased precipitation in December 2016 led to termination of the drought watch on January 18, 2017. The Montague flow objective was 1,750 ft3/s from January 19, 2017, until June 15, 2017, when the flow objective was increased to 1,858 ft3/s to account for excess release flows. The Montague flow objective returned to

1,750 ft3/s on October 23, 2017, when FFMP2017 became effective. Conservation releases from New York City reservoirs were made at the rates shown in tables 4a–g in the June 1, 2016, FFMP (app. 1 in Russell and others, 2024) and FFMP2017 (app. 2 of this report). The following tables were used: table 4a of both FFMPs from December 2016 through early February 2017, table 4c in mid-February, tables 4f and 4g for late February–March, tables 4a–d in April, tables 4f and 4g in early May, table 4c in mid-May, table 4e for June–August, and table 4g for October–November 2017 (see “Archived OST [Operational Support Tool] Summary Data” at https://webapps.usgs.gov/odrm/data/data.html).

Diversions to New York City Water Supply The 1954 amended Decree authorizes New York City to divert water from the Delaware River Basin at a rate not to exceed the equivalent of 800 Mgal/d. The Decree specifies that the diversion rate shall be computed as the aggregate total diversion beginning June 1 of each year divided by the total number of days elapsed since the preceding May 31. The records of daily diversions through the East Delaware, West Delaware, and Neversink Tunnels (fig. 1) were provided to the ODRM by the NYCDEP. These records were obtained from calibrated instruments belonging to

Operations 7 New York City that were connected to Venturi meters installed in the tunnel conduits. The flow measurements were transmitted electronically on a 15-second interval to New York City computers; 5-minute interval release and diversion quantities for the preceding 5-minute period were computed using the instantaneous rate-of-flow data from each instrument. These 5-minute quantities were then summed to compute daily total flows, which were reported daily to the ODRM. Each week, the computed diversion values were checked against the flow-meter totalizer readings by the NYCDEP and corrected when necessary. Daily diversions during the report year from the Pepacton, Cannonsville, and Neversink Reservoirs to the New York City water supply system (Rondout Reservoir) are given in table 6 (in back of report). A running account of the average rates of combined diversions from the three reservoirs from June 1, 2016, computed as stipulated by the Decree, is shown in table 6. A total of 184.157 billion gallons of water was diverted to New York City water supply system during the year ending May 31, 2016, with an average of 505 Mgal/d, which is below the maximum diversion rate. The maximum daily diversion from a single reservoir was 474 million gallons (Mgal) on March 7, 2017, from the Cannonsville Reservoir. The maximum daily combined diversion from all three reservoirs was 905 Mgal on November 16, 2017. The diversions by New York City did not exceed the limits stipulated by the Decree and the FFMPs. The data on water consumption by New York City for each calendar year since 1950, from all sources of supply, are presented in table 7 (in back of report). The East Delaware Tunnel is used to divert water from the Pepacton Reservoir to the Rondout Reservoir. The hydroelectric powerplant at the downstream end of the East Delaware Tunnel operated most days of the report year. When the powerplant was not operating, some water leaked through the wicket gates and was not recorded on the totalizer. A current-meter measurement made in 1989 showed that the (assumed constant) rate of leakage is about 12.4 ft3/s (8.0 Mgal/d). Because the powerplant was not in operation for the equivalent of 63 days during the report year, the estimated quantity of unmeasured leakage (diverted but not recorded) was about 0.5 billion gallons. The West Delaware Tunnel is used to divert water from the Cannonsville Reservoir to Rondout Reservoir. When the valves were closed, an inspection of the channel below the outlet revealed negligible leakage. A hydroelectric powerplant uses water diverted through the West Delaware Tunnel, but the plant operates only when diversions are less than 300 Mgal/d. When the powerplant is not operating, the valves on the pipelines to the plant are closed, and there is no leakage through the system. The Neversink Tunnel is used to divert water from Neversink Reservoir to Rondout Reservoir. A hydroelectric powerplant uses water diverted through Neversink Tunnel. When the powerplant is not operating and the main valve on the diversion tunnel is open, leakage occurs that is not recorded by the Venturi instruments. One current-meter

measurement made in 1999 showed a leakage rate of 16.2 ft3/s (10.5 Mgal/d). When the powerplant is operating, the leakage is included in the recorded flow. No leakage occurs when the main valve on the tunnel is closed. During the report year, the powerplant operated part of the day on most days and was not operated for the equivalent of 222 days. About 2.3 billion gallons of water was diverted but not recorded, according to the leakage rate noted above and records of powerplant operation.

Diversions by New Jersey The Decree authorizes New Jersey to divert water from the Delaware River and its tributaries in New Jersey to areas outside of the Delaware River Basin without compensating releases. Under the FFMPs, New Jersey diversions shall not exceed 100 Mgal/d as a monthly average, and the daily mean diversion shall not exceed 120 Mgal/d. When the lower part of the Delaware River Basin is in a drought emergency, diversions shall not exceed 85 Mgal/d as a running average. The Delaware River Basin was in drought watch from December 1, 2016, to January 18, 2017 (DRBC, 2017). The USGS streamgage on the Delaware and Raritan Canal at Port Mercer, N.J. (site number 01460440) (fig. 1), is used as the official control point for measuring these diversions by New Jersey. Based on data collected by the USGS at this site, the maximum monthly average diversions were 102.1 Mgal/d during October and 103.6 Mgal/d in November 2017 (table 8, in back of report) (USGS, 2019e). The maximum daily mean diversions were 107 million gallons (Mgal/d) on October 8 and 21, 2017 (table 8). The data in this report are the approved gage data rather than the provisional data used for real-time decisions. Diversions by New Jersey exceeded the limits stipulated by the FFMP in October and November 2017 based on the approved data. However, the diversions fell within the allowable limits based on provisional data at the time of operation and, therefore, did not exceed the limits stipulated by the FFMP.

Montague Flow Objective The components of forecasted flow at the Montague site during low flow—forecasted releases from hydroelectric power reservoirs, estimated uncontrolled runoff including conservation releases from Rio Reservoir, and forecasted increases in runoff from precipitation—and the sums of flows exclusive of releases from New York City’s reservoirs are given in table 9 (in back of report). If the computed sum of the components is less than the Montague flow objective, then the deficiency is made up by releases from New York City’s reservoirs, as directed by the ODRM. Table 10 (in back of report) presents the ODRM daily operations record of reservoir releases and segregation of the various components contributing to the flow of the Delaware River at the Montague site.

8 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 The Montague flow objective was reduced to 1,650 ft3/s on December 1, 2016, and remained so until January 18, 2017, when the drought watch was ended. The Montague flow objective was 1,750 ft3/s from January 19, 2017, until June 15, 2017, when the flow objective was increased to 1,858 ft3/s to account for the excess release flows. The Montage flow objective returned to 1,750 ft3/s on October 23, 2017, when FFMP2017 became effective. The forecasted flow of the Delaware River at the Montague site, based on provisional data and exclusive of water released from the New York City reservoirs, was greater than the flow objective on all days from December 1, 2016, to August 8, 2017, after which the forecasted flow of the Delaware River at the Montague site was less than the flow objective for 55 days from early August through late October, and the ODRM directed releases for 52 of those days (table 9). The observed daily mean discharge at the Montague site was greater than the applicable flow objectives on all days of the report year, except for September 2 and 3, September 20–23, October 14–16, and October 22, 2017 (table 11, in back of report) (USGS, 2019d). Only two of those observed daily mean flows—1,660 ft3/s on September 22, and 1,600 ft3/s on October 15—were less than 90 percent of the flow objective (table 11) (USGS, 2019d). The components of the total flow observed at the Montague site from August 1 through October 31, 2017, are shown in figure 3. The flow is segregated into the portion derived from the New York City reservoirs, the portion contributed by the powerplant reservoirs, and the uncontrolled runoff from the drainage area below the reservoirs. As previously described, the uncontrolled runoff was computed as the residual of observed flow minus releases and was subject to errors in the observations, transit times, and routings of the flow components. The conservation release from Rio Reservoir was included in the uncontrolled runoff component. The effect of these uncertainties is incorporated into the computation of uncontrolled runoff.

Excess Release Quantity and Interim Excess Release Quantity In the absence of an FFMP, the calculation of the excess release quantity and its use, as specified by the Decree (paragraph III–B–1 (c) and (d)), became effective. New York City estimated its anticipated consumption of water from all of its sources during 2017 as 597.676 billion gallons, and the safe yield from all sources obtainable without pumping as 607.725 billion gallons (Paul V. Rush, New York City Department of Environmental Protection, written commun., 2017). The excess release quantity was computed to be 8.341 billion gallons, and based on a release spanning 120 days, the excess release rate was computed to be 108 ft3/s, yielding a Montague flow target of 1,858 ft3/s. The flow target was applied for June 15–October 23, 2017, when FFMP2017 became effective. The total daily excess

release credits accumulated for June 15–October 23, 2017, was 7.385 billion gallons, or 11,425 cubic feet per second accumulated daily ([ft3/s]-d) (table 10, column 14). A total of 6,000 (ft3/s)-d of special thermal stress releases are allowed per DRBC Docket No. D–77–20 CP (Revised), “Reservoir Release Program, Section C—Special Thermal Stress Releases” (DRBC, 2023). Calls for releases occurred between June 12, 2017, and October 21, 2017, which resulted in a total use of 4,947 (ft3/s)-d (table 10, column 12). The reported values are the portion of reservoir releases greater than the conservation release rates established in D–77–20 CP (Revised), on days when a request for additional water was made. On October 23, 2017, when FFMP2017 became effective, the Interim Excess Release Quantity (IERQ) Banks were established (app. 2). The Rapid Flow Mitigation Bank was used on October 22, 26, and 27, 2017. A total of 634 (ft3/s)-d was used, and a remaining volume of 366 (ft3/s)-d was still available. No other FFMP2017 IERQ Banks were used during the report year.

Tailwaters Habitat Protection and Discharge Mitigation Program The FFMP established a Tailwaters Habitat Protection and Discharge Mitigation Program (THPDMP), which consists of (1) conservation releases designed to protect the ecology in the tailwaters below the New York City reservoirs and (2) discharge mitigation releases designed to help mitigate the effects of spilling immediately below the New York City reservoirs. Controlled releases were made from the New York City Delaware River Basin reservoirs under the FFMP until it expired on May 31, 2017. From December 1, 2016, through May 31, 2017, the total of reservoir conservation-releases from the Pepacton, Cannonsville, and Neversink Reservoirs was 75.502 billion gallons. The reservoir conservation-release requirements reverted to lesser flows established by provisions of DRBC Docket No. D–77–20 CP (Revised); New York City, at its discretion, continued a program of releases consistent with the 2016 FFMP conservation-release requirements through September 5, 2017, when it began ramping down the conservation releases to those required of Dockett No. D–7 7–20 CP (Revised) (DRBC, 2023). From June 1, 2017, when the 2016 FFMP expired, through October 23, 2017, when FFMP2017 was signed, the total of conservation releases from the Pepacton, Cannonsville, and Neversink Reservoirs was 48.568 billion gallons. On October 23, 2017, the New York City reservoirs began making controlled releases for the THPDMP under FFMP2017. The total of conservation releases from the Pepacton, Cannonsville, and Neversink Reservoirs from October 24 through November 30, 2017, was 6.033 billion gallons. A total of 130.103 billion gallons was released from the New York City Delaware River Basin reservoirs, under the THPDMP, from December 1, 2016, to November 30, 2017.

Operations 9 4,000 EXPLANATION Uncontrolled runoff

3,500

Powerplant reservoirs

Discharge, in cubic feet per second

New York City reservoirs

3,000

2,500 Montague flow objective

2,000

1,500

1,000

500

August

September

2017

October

Figure 3. Graph showing flow components—uncontrolled runoff, powerplant reservoirs, and New York City reservoirs—for the Delaware River at Montague, New Jersey, August 1– October 31, 2017. The Montague flow objective is also shown.

Comparison of River Master Operations Data With Other Records The ODRM operations are conducted on a daily basis and, by necessity, use preliminary data on streamflow. This section compares records used in the ODRM operations with the final data published for selected USGS streamgages. The data on releases were reported in million gallons per day and converted to cubic feet per second for comparisons.

Analysis of Forecasts Based on anticipated contributions from the flow components described previously but excluding releases from New York City reservoirs, the forecasted streamflow at the Montague site differed from observed flow on most days. Occasionally, variations in the components were partially compensating, and observed flows are comparable to forecasted flows. The forecasted flow of the Delaware River at the Montague site, exclusive of releases from the New York City reservoirs, was less than the flow objective on 55 days from early August through late October 2017; directed releases

were made on 52 of those days (table 9). Table 12 compares forecasted and actual flow from hydroelectric powerplant releases for August 7–October 31, 2017. For August 7–October 31, 2017, as shown in table 12, actual releases from Lake Wallenpaupack and Rio Reservoir averaged 2.4 and 165 percent more, respectively, than the forecasted releases. Powerplant forecasted volumes were calculated from columns 1 and 2 in table 9; powerplant actual releases were calculated from columns 5 and 6 in table 10. Observed runoff (column 10 in table 10) from the uncontrolled area was about 17 percent more than the forecasted runoff (columns 3 and 4 in table 9). Forecasted and actual releases from Lake Wallenpaupack and Rio Reservoir can differ considerably on any given day. The differences between the actual and forecasted daily releases from August 7 to October 31, 2017, are as follows: actual releases at Lake Wallenpaupack differed from forecasted releases by 839 ft3/s less than forecasted releases to 461 ft3/s greater than forecasted releases, and daily releases at Rio Reservoir differed by 106 ft3/s less than forecasted releases to 851 ft3/s greater than forecasted releases. Based on the measured streamflow at the Montague site, total directed releases from the New York City reservoirs during the report year (column 9 in table 9) were about 9 percent more than required for exact forecasting (column 11 in table 9).

10 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 A comparison of forecasted and computed runoff hydrographs from the uncontrolled area (fig. 4) indicated that the forecasts were suitable for use in designing releases from the New York City Delaware River Basin reservoirs. Numerical adjustments to the designs were made when needed to compensate for forecast errors. However, because of traveltimes, the effects of the adjustments on flows at the Montague site were not evident until several days after the design date.

Releases From New York City Reservoirs The ODRM operations data on controlled releases from the Pepacton, Cannonsville, and Neversink Reservoirs to the Delaware River were provided by the NYCDEP to the ODRM. These data were collected from calibrated instruments connected to Venturi meters installed in the outlet conduits of the reservoirs. The USGS streamgage on the East Branch Delaware River at Downsville, N.Y. (site number 01417000; fig. 1), is 0.5 miles (mi) downstream from Downsville Dam. Discharge measured at this site includes releases from Pepacton Reservoir and a small amount of seepage and any runoff that enters the channel between the dam and the streamgage. The drainage area is 371 mi2 at the dam and 372 mi2 at this site. The streamgage’s records are rated “good,” meaning that about 95 percent of the measured daily mean discharges are within 10 percent of the actual discharge. Figure 5A shows the measured flow from the Pepacton Reservoir, including spillway, conservation, and directed releases reported by New York City compared with records for the USGS streamgage on the East Branch Delaware River at Downsville, N.Y. (table 13, in back of report) (USGS, 2019a), from December 1, 2016, to November 30, 2017. The average difference is 7.7 percent, and 95 percent of the daily differences between the streamgage readings and New York City records are within 17.3 percent of the actual discharge. Larger differences rarely occur and can be due to rainfall. Instruments connected to Venturi meters were recalibrated periodically by New York City to improve the accuracy of the recorded flow data. The USGS streamgage on the West Branch Delaware River at Stilesville, N.Y. (site number 01425000; fig. 1), is 1.4 mi downstream from the Cannonsville Dam.

The discharge measured at this site includes releases from the Cannonsville Reservoir and runoff from 2 mi2 of drainage area between the dam and the streamgage. The drainage area is 454 mi2 at the dam and 456 mi2 at the streamgage. The streamgage records are rated “fair,” which means that about 95 percent of the daily mean discharges are within 15 percent of the actual discharge. The records include runoff from the area between the dam and the streamgage and seepage near the base of the dam. Figure 5B shows releases from the Cannonsville Reservoir (including spillway, conservation, and directed releases) reported by New York City compared with records for the USGS streamgage on the West Branch Delaware River at Stilesville, N.Y. (table 14, in back of report) (USGS, 2019b), from December 1, 2016, to November 30, 2017. The mean difference is 11.8 percent, and 95 percent of the daily differences between the streamgage readings and New York City records are within 29.2 percent of the actual discharge. The largest differences between the released and measured flow are primarily at lower flow rates. The USGS streamgage on the Neversink River at Neversink, N.Y. (site number 01436000; fig. 1), is 1,650 feet (ft) downstream from Neversink Dam. The discharge measured at this site includes releases from Neversink Reservoir and, during storms, a small amount of runoff that originates from between the dam and the streamgage. The drainage area is 92.5 mi2 at the dam and 92.6 mi2 at the streamgage. The streamgage records are rated “good,” meaning that about 95 percent of the measured daily mean discharges are within 10 percent of the actual discharge. Figure 5C shows releases from the Neversink Reservoir, including spillway, conservation, and directed releases reported by New York City compared with the records for the USGS streamgage on the Neversink River at Neversink, N.Y. (table 15, in back of report) (USGS, 2019c), from December 1, 2016, to November 30, 2017. The mean difference between the released flow and measured flow is 7.4 percent, and 95 percent of the daily differences between the streamgage readings and New York City records are within 19 percent of the actual discharge.

Table 12. Cumulative forecasted and actual release volume from Lake Wallenpaupack, Rio Reservoir, and uncontrolled runoff from August 7 to October 31, 2017. [(ft3/s)-d, cubic foot per second accumulated daily]

Release source Lake Wallenpaupack Rio Reservoir Runoff from uncontrolled area

Forecasted volume ([ft3/s]-d)

Actual volume ([ft3/s]-d)

19,856

20,330

1,062

2,811

114,281

133,286

Quality of Water in the Delaware River Estuary 11 4,000

EXPLANATION Computed uncontrolled runoff

3,500

Forecasted uncontrolled runoff

Discharge, in cubic feet per second

3,000

2,500

2,000

1,500

1,000

500

August

September

2017

October

Figure 4. Hydrographs of computed and forecasted uncontrolled runoff components, Delaware River at Montague, New Jersey (U.S. Geological Survey site number 01460440), from August 7 to October 31, 2017. Discharge is shown in cubic feet per second.

The ODRM’s operations record for the streamgage at the Delaware River at Montague, N.J. (table 10), showed about 0.96 percent less discharge for the report year than the published USGS record for the streamgage (table 11). Daily values for the two records agreed closely, except during iceaffected periods and the summer vegetation-growth season.

the FFMPs authorized. New York City released water from its reservoirs at rates directed by the ODRM to meet the applicable Montague flow objectives. During the report year, New York City complied fully with all directives and requests of the ODRM. Diversions from the Delaware River Basin by New Jersey were within limits stipulated by the Decree. New Jersey complied fully with all directives and requests of the ODRM. The IERQ and excess release quantity were used under the FFMPs and agreements completed throughout the report year.

Conformance of Operations Under the Amended Decree of the Supreme Court of the United States Entered June 7, 1954

Quality of Water in the Delaware River Estuary

Delaware River at Montague, New Jersey

From December 1, 2016, to November 30, 2017, operations of the ODRM were conducted as stipulated by the Decree and the FFMPs. The diversions from the Delaware River Basin to the New York City water supply system did not exceed those the Decree and

This section describes water-quality monitoring programs for the Delaware River estuary during the report year. Selected data are presented, and water-quality conditionsare summarized.

12 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 3,500

3,000 2,500 y = 0.9718x + 3.2796 R2 = 0.9816

2,000 1,500

New York City Reservoir-measured mean flow, in cubic feet per second

1,000 500 0 5,000

500

1,000

1,500

2,000

2,500

3,000

3,500

4,500 4,000 3,500

y = 1.0452x − 9.0203 R2 = 0.9909

3,000 2,500 2,000 1,500 1,000 500 0 2,000

1,000

2,000

3,000

4,000

5,000

2,000

2,500

1,800 1,600 1,400 1,200

y = 0.8799x − 15.066 R2 = 0.9208

1,000 800 600 400 200 0

500

1,000

1,500

U.S. Geological Survey-computed mean flow, in cubic feet per second

Figure 5. Graphs showing New York City-measured mean flow, in cubic feet per second, compared with computed mean flow records for U.S. Geological Survey (USGS) streamgaging sites downstream from their respective reservoirs: (A) East Branch Delaware River at Downsville, New York (N.Y.) (site number 01417000), downstream from Pepacton Reservoir (data from USGS, 2019a); (B) West Branch Delaware River at Stilesville, N.Y. (site number 01425000), downstream from Cannonsville Reservoir (data from USGS, 2019b); and (C) Neversink River at Neversink, N.Y. (site number 01436000), downstream from Neversink Reservoir (data from USGS, 2019c), for December 1, 2016– November 30, 2017.

Quality of Water in the Delaware River Estuary 13 75°30'

75°00'

wa ela

er Riv

PENNSYLVANIA

C D

h Sc

lki

40°00'

River

G 3

EXPLANATION U.S. Geological Survey continuous monitoring site and identifier

F 1 2

3 4

J K

Delaware River Basin Commission periodic sampling site name and identifier

L M N

39°30'

NEW JERSEY

Trenton Benjamin Franklin Bridge (Philadelphia) Chester Reedy Island Jetty

S DELAWARE T

A B C D E F G H I J K L M N P Q R S T U V W

Biles Channel Florence Bend Burlington-Bristol Bridge Torresdale Betsy Ross Bridge Benjamin Franklin Bridge Navy Yard Paulsboro Eddystone Marcus Hook Oldmans Point Cherry Island New Castle Pea Patch Island Reedy Point Liston Point Smyrna River Ship John Light Mahon River Elbow of Crossledge South of Joe Flogger Shoal South of Brown Shoal

V Delaware Bay 39°00'

0 0

5 5

10 MILES 10 KILOMETERS

Figure 6. Map showing location of water-quality monitoring sites on the Delaware River estuary. U.S. Geological Survey streamgaging sites (1–4) and Delaware River Basin Commission (DRBC) sampling sites (A–N, P–W) are listed. Modified from DRBC (2021).

14 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Water-Quality Monitoring Programs

Water Quality During the 2017 Report Year

U.S. Geological Survey Continuous Water-Quality Streamflow Monitoring Program Streamflow significantly affects water quality in the As part of a long-term program, in cooperation with the DRBC, the USGS operates continuous water-quality monitors at four locations in the Delaware River estuary between Trenton, N.J., and Reedy Island Jetty, Delaware (Del.) (fig. 6). Continuous water temperature, specific conductance, dissolved oxygen, and pH data were collected at four USGS monitoring sites: the Delaware River at Trenton, N.J. (site number 01463500); the Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (Pa.) (site number 01467200); the Delaware River at Chester, Pa. (site number 01477050); and the Delaware River at Reedy Island Jetty, Del. (site number 01482800). Continuous turbidity data were also collected at the Trenton and Reedy Island Jetty sites. The DRBC and others use these data to assess water-quality conditions and track the “salt front” movement in the Delaware River estuary. Continuous monitoring data are processed and stored in the USGS National Water Information System web database (NWIS; https://waterdata.usgs.gov/ nwis). Selected monitoring data from the report year are included in this section. For this report, USGS site number 01467200 is referred to as “Delaware River at Benjamin Franklin Bridge at Philadelphia, Pa.” The gage was located there during the report period (from December 1, 2016, to November 30, 2017). In January 2020, the gage was moved 150 ft upstream and renamed “Delaware River at Penn’s Landing, Philadelphia, Pa.” The updated name is used in the “References Cited” section to refer to the data listed in the NWIS database at the time of publication.

Delaware River estuary. High freshwater inflows commonly result in improved water quality by limiting the upstream movement of seawater and reducing the concentration of dissolved substances. High inflows also aid in maintaining lower water temperatures during warm weather and support higher concentrations of dissolved oxygen. Under certain conditions, however, high streamflows can transport large quantities of nutrients to the estuary, which could result in excessive algae levels. Streamflow from the Delaware River Basin upstream from the Trenton site is the primary source of freshwater inflow to the Delaware River estuary. During the report year, monthly mean streamflow measured at the USGS streamgage at the Delaware River at Trenton, N.J. (site number 01463500), was highest during April 2017 (27,900 ft3/s) and lowest during October 2017 (4,576 ft3/s; table 16, in back of report) (USGS, 2019f). Long-term monthly mean streamflow was computed for October 1912–November 2016. Monthly average streamflows were less than the long-term mean monthly flows from December 2016 through March 2017, May 2017, and from September through November 2017. The greatest percentage of flow deficiency was in December 2016, when monthly average streamflow was about 50 percent of the long-term average monthly flow. The highest daily mean streamflow during the report year was 54,500 ft3/s on April 1, 2017, and the lowest was 3,170 ft3/s on October 23, 2017 (table 16).

Delaware River Estuary Boat Run Monitoring Program

Water temperature influences water quality, as it affects various physical, chemical, and biological properties of water (USGS, 2020c). Increases in water temperature usually have detrimental effects on water quality by decreasing the saturation level of dissolved oxygen and by increasing the biological activity, such as aerobic respiration, of aquatic organisms. Although the primary factors that affect water temperature in the Delaware River estuary are climatic, various kinds of water use, especially powerplant cooling, can also have substantial effects. Water temperature data for the site at the Benjamin Franklin Bridge, Philadelphia, Pa., were collected almost continuously from April to November 2017. The procedures used to create figure 7 of this report were started for the 2011 report (DiFrenna and others, 2020). The available longterm average daily temperature data were retrieved from the USGS NWIS database for April through November; the average value was computed for each month from 1964 to 2016 (fig. 7). The monthly average temperatures were greater than the long-term average monthly temperature in April,

Each year, the DBRC contracts with the Delaware Department of Natural Resources and Environmental Control to collect water samples at 22 locations in the Delaware River estuary from Biles Channel to South Brown Shoal (fig. 6, sites A–N, P–W; DRBC, 2021). Samples are collected monthly from April to October. This program intends to provide accurate, precise, and defensible estimates of the surface-water quality of the Delaware River estuary and allow assessments of compliance with the waterquality criteria. Sample analyses include routine and bacterial parameters, nutrients, heavy metals, chlorophyll-a, dissolved silica, and volatile organics. This report does not present water-quality data for these DBRC sampling sites, but the data are accessible from the DRBC Boat Run Water Quality Data Explorer (https://www.nj.gov/drbc/programs/quality/ boat-run.html).

Water Temperature

Quality of Water in the Delaware River Estuary 15 July, October, and November 2017 (fig. 7). Monthly average temperatures were less than the respective long-term averages in May, June, August, and September 2017 (fig. 7). The maximum daily mean water temperature of 28.0 degrees Celsius was recorded on July 22 and 23, 2017 (USGS, 2020d).

Specific Conductance and Chloride Specific conductance is a measure of the capacity of water to conduct an electrical current and is a function of the types and quantities of dissolved substances in water (U.S. Environmental Protection Agency, 2016). As concentrations of dissolved ions increase, the specific conductance of the water also increases. Specific conductance measurements are good indicators of dissolved solids content and total ion concentrations, including chloride. Seawater and some artificial constituents can cause the specific conductance of estuary water to increase substantially. Dilution associated with high freshwater inflows results in decreased levels of dissolved solids and lower specific conductance, whereas low inflows have the opposite effect. The upstream movement of seawater and the accompanying increase in chloride concentrations is an essential concern for water supplies obtained from the Delaware River estuary (Kauffman and others, 2009). Water with chloride

concentrations greater than 250 milligrams per liter (mg/L) is considered undesirable for domestic use, and water with concentrations exceeding 50 mg/L is unsatisfactory for chemically sensitive consumers and some industrial processes. Chloride concentrations in the estuary increase in a downstream direction with proximity to the Atlantic Ocean. Specific conductance, not chloride concentration, was measured by the USGS at the Reedy Island Jetty site. Chloride concentrations at Chester, Pa., were measured by Kimberly-Clark Chester Operations. The DRBC provided these data, which are not derived from specific conductance data. At the Reedy Island Jetty site, the greatest daily maximum specific conductance was 23,400 microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C) on December 7, 2017 (table 17, in back of report) (USGS, 2020h). Daily maximum specific conductance during the report year exceeded 3,780 uS/cm at 25 °C on approximately 97 percent of the 365 days with measured specific conductance values in the report year. The lowest daily minimum specific conductance was 466 µS/cm at 25 °C on April 16, 2017. Daily minimum specific conductance exceeded 3,780 uS/cm at 25 °C on 66 percent of the 365 days with measured specific conductance values in the report year.

EXPLANATION Average monthly, 1964 to 2016 Monthly average, 2017

Water temperature, in degrees Celsius

April

May

June

July

August

September

October

November

2017

Figure 7. Bar chart showing monthly average water temperatures in 2017 and long-term average monthly water temperatures from 1964 to 2016, for April through November, in the Delaware River estuary at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (data from USGS, 2020d). Water temperatures are given in degrees Celsius.

16 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 The data measured by Kimberly-Clark Chester Operations at Chester, Pa., indicates the greatest daily maximum chloride concentration was 651 mg/L on December 1 and 2, 2016 (table 18, in back of report). During the report year, daily maximum concentrations exceeded 50 mg/L on about 73 percent of the 358 days on which measurements were made. The lowest daily minimum chloride concentration was 14 mg/L on December 19, 2016. Daily minimum concentrations exceeded 50 mg/L on about 69 percent of the 358 days on which measurements were made. Daily maximum chloride concentrations exceeded 50 mg/L on most days from December 1, 2016, to early April 2017 and from late August to mid-November 2017 (table 18).

Dissolved Oxygen Dissolved oxygen in water is necessary for the respiratory processes of aquatic organisms and chemical reactions in aquatic environments (USGS, 2020a). The primary source of dissolved oxygen in the Delaware River estuary is diffusion from the atmosphere and, to a lesser extent, the photosynthetic activity of aquatic plants. The principal factors that affect dissolved-oxygen concentrations in the estuary are water temperature, biochemical oxygen demand, freshwater inflow, phytoplankton, turbidity, salinity, and tidal and wind-driven mixing. Concentrations of dissolved oxygen at several sites on the Delaware River estuary have been measured since 1961 by the USGS. Two of these sites, the Delaware River at Benjamin Franklin Bridge at Philadelphia, Pa., and the Delaware River at Chester, Pa., have nearly continuous records and are in the reach of the estuary most affected by effluent discharges, which can lead to reduced dissolved-oxygen concentrations because of increasing biological-oxygen demand by aerobic bacteria in water. For these sites, the daily mean and minimum daily mean dissolved-oxygen concentrations for July–September during the 1965–2017 report years are shown in figure 8. Although dissolved-oxygen concentrations have increased over this 53-year period, mean concentrations can vary substantially from year to year. Due to technological changes and other factors, the process used to calculate mean dissolved-oxygen concentrations and those data values has changed over time. The procedures used to create figure 8 of this report have been used since the 2009–2010 Delaware River Master report (Russell and others, 2019). The available mean and minimum daily dissolved-oxygen concentration data were downloaded from the USGS NWIS database for July, August, and September, and the average mean and average minimum dissolved-oxygen concentrations of all those daily values were computed over those 3 months in each report year. Dissolved-oxygen concentrations in the Delaware River estuary are usually greatest near the Trenton site and decrease in a downstream direction.

Concentrations commonly reach minimum levels in an area just downstream from the Benjamin Franklin Bridge site. During the report year, the lowest recorded daily mean concentration was 5.0 mg/L on July 15 and 16, 2017 (table 19, in back of report) (USGS, 2020d). Daily mean dissolved-oxygen concentrations were consistently 6.0 mg/L or greater from April 1 through July 5, 2017, and October 1 through November 30, 2017. At the Chester site, the lowest recorded daily mean dissolved-oxygen concentration was 5.0 mg/L on August 16, 2017 (table 20, in back of report) (USGS, 2020f). Histograms of quarter-hourly dissolvedoxygen concentrations during the critical summer period (July 1–September 30, 2017) at the Benjamin Franklin Bridge and Chester sites are presented in figure 9. During the 2017 critical summer period, quarterhourly dissolved-oxygen concentrations were 4 mg/L or less on no days (0 percent) at the Benjamin Franklin Bridge and Chester sites (USGS, 2020e, g).

Hydrogen-Ion Activity (pH) The pH of a solution is a measure of the effective concentration (activity) of dissolved hydrogen ions. Solutions with a pH less than 7 are considered acidic, whereas solutions with a pH greater than 7 are considered basic or alkaline. The pH of uncontaminated surface water ranges from 6.5 to 8.5. Major factors affecting the pH of surface water include the geologic composition of the drainage basin and human inputs, including effluent discharges. In addition, photosynthetic activity and dissolved gases, including carbon dioxide, hydrogen sulfide, and ammonia, can considerably affect pH. The pH of water determines the solubility (the amount that can be dissolved in the water) and biological availability (the amount that can be used by aquatic life) of chemical constituents such as nutrients (for example, phosphorus, nitrogen, and carbon) and heavy metals (for example, lead, copper, and cadmium) (USGS, 2020b). During the report year, pH was measured seasonally (April–November) at the Benjamin Franklin Bridge and Chester sites and continuously at the Reedy Island Jetty site. During these periods, the ranges of daily median pH measured at these sites are as follows: Benjamin Franklin Bridge, 7.0–7.4; Chester, 7.0–7.7; and Reedy Island Jetty, 7.2–7.9 (USGS, 2020d, f, h). The pH of water in the Delaware River estuary is lowest near the Trenton site and increases (water becomes more alkaline) in the downstream direction. The pH of water in the Delaware River estuary between the Benjamin Franklin Bridge and Reedy Island Jetty sites was not a limiting factor for aquatic health or other beneficial water uses during the report year.

Quality of Water in the Delaware River Estuary 17

A Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (01467200)

Dissolved-oxygen concentration, in milligrams per liter

EXPLANATION 1

Mean Minimum daily mean

0 7

Delaware River at Chester, Pennsylvania (01477050)

EXPLANATION Mean

Minimum daily mean 0 1965

1970

1975

1980

1985

1990

Year

1995

2000

2005

2010

2015

2020

Figure 8. Graphs showing the daily mean and minimum daily mean dissolved-oxygen concentrations (in milligrams per liter) averaged for July–September annually at two U.S Geological Survey (USGS) streamgaging sites on the Delaware River estuary, 1965–2017: (A) Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (Pa.) (site number 01457200; data from USGS, 2020d); and (B) Delaware River at Chester, Pa. (site number 01477050; data from USGS, 2020f).

18 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 A

11.0

Dissolved-oxygen concentration, in milligrams per liter

B Delaware River at Chester, Pennsylvania (01477050)

Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (01467200)

10.5 10.0 9.5 9.0 8.5 8.0 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 0

35 0

Percent of time

Figure 9. Graphs showing percent distribution of quarter-hourly dissolved-oxygen concentrations (in milligrams per liter) at two U.S. Geological Survey (USGS) streamgaging sites on the Delaware River estuary, from July to September 2017 at (A) Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (Pa.) (site number 01467200; data from USGS, [2020e]); and (B) Delaware River at Chester, Pa. (site number 91477050; data from USGS, [2020g]).

Tables 1, 3–11, and 13–20 19

Tables 1, 3–11, and 13–20 Table 1. Precipitation in the Delaware River Basin upstream from Montague, New Jersey. [Data from the National Weather Service, New York City Department of Environmental Protection, and Office of Delaware River Master. in., inches; —, not applicable]

Month

December 1940– November 2016 monthly average precipitation (in.)

December 2016–November 2017 Precipitation (in.)

Percent of average

Excess (+) or deficit (–) precipitation compared with long-term average Month

Cumulative

December

3.50

3.41

–0.09

January

2.99

3.20

107

0.21

0.12

February

2.65

2.87

108

0.22

0.34

March

3.34

4.04

121

0.70

1.04

April

3.74

4.79

128

1.05

2.09

May

4.16

5.06

122

0.90

2.99

June

4.26

3.81

–0.45

2.54

July

4.24

6.45

152

2.21

4.75

August

4.05

4.55

112

0.50

5.25

September

4.06

2.36

–1.70

3.55

October

3.72

6.22

167

2.50

6.05

November

3.67

1.09

–2.58

3.47

Total

44.38

47.85

108

—

20 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 3. Storage in Pepacton Reservoir, New York, for report year ending November 30, 2017. [Delaware River Master daily operations record; gage reading at 0800 hours; data provided by New York City. Storage is given in millions of gallons above the elevation of 1,152.00 feet. Add 7,711 million gallons for total contents above sill of outlet tunnel at the elevation of 1,126.50 feet. Storage at spillway level is 140,190 million gallons. —, not applicable; Mgal/d, million gallons per day; ft3/s, cubic foot per second] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

70,613

81,540

98,860

116,746

131,594

139,785

140,431

137,492

132,058

122,104

112,613

112,662

71,725

81,678

99,213

117,501

132,791

141,913

140,301

137,492

131,630

121,677

112,135

113,057

72,419

81,815

99,551

118,090

133,707

142,322

140,153

137,419

131,702

121,334

111,710

113,322

72,886

82,232

99,831

118,445

134,768

141,931

139,951

137,176

131,487

121,112

111,235

113,535

73,250

82,788

100,048

118,579

136,763

141,598

139,969

136,981

131,202

120,770

110,827

113,601

73,497

83,165

100,249

118,714

138,351

141,672

141,172

136,708

130,901

120,378

110,404

113,568

73,745

83,443

100,342

118,934

141,116

141,468

141,524

136,417

130,546

120,633

109,965

113,683

73,953

83,625

100,683

119,175

142,285

141,246

141,283

136,127

130,191

120,787

109,559

113,486

73,967

83,780

101,382

119,444

142,230

141,023

140,987

135,964

129,784

120,667

109,251

113,420

74,006

83,948

101,758

119,665

141,968

140,783

140,746

135,674

129,430

120,395

109,283

113,239

74,084

84,257

102,101

120,038

141,524

140,653

140,449

135,312

129,007

120,123

109,251

113,090

74,202

84,524

102,523

120,344

141,172

140,542

140,264

134,949

128,743

119,834

109,218

112,909

74,281

86,423

103,058

120,667

140,727

140,560

140,153

134,678

128,462

119,495

109,202

112,695

74,426

87,825

103,294

120,872

140,560

140,931

140,024

134,787

128,093

119,240

109,202

112,481

74,439

88,792

103,515

121,060

140,246

140,894

139,969

134,986

127,741

119,002

109,202

112,250

74,413

89,491

103,815

121,180

139,978

140,820

139,877

134,841

127,407

118,630

109,234

112,070

74,439

90,074

104,019

121,248

139,877

140,671

139,877

134,606

127,006

118,276

109,234

111,808

74,596

90,878

104,304

121,334

139,693

140,486

139,840

134,354

126,586

117,905

109,218

111,710

76,702

91,688

104,638

121,351

139,308

140,431

139,914

133,977

126,447

117,585

109,170

111,710

77,816

92,501

105,193

121,368

139,050

140,449

140,394

133,617

126,184

117,216

109,154

111,792

78,600

93,155

105,701

121,626

139,271

140,375

140,135

133,293

125,888

116,830

109,137

112,053

79,100

93,737

106,180

121,899

139,822

140,264

139,859

132,952

125,504

116,478

109,121

112,119

79,442

94,261

106,580

121,951

140,171

140,190

139,564

132,611

125,313

116,026

109,105

112,021

79,673

94,920

107,476

122,053

140,357

140,043

139,455

132,952

125,175

115,608

108,765

112,021

79,891

95,508

109,251

122,121

140,412

140,006

139,289

133,491

124,846

115,160

108,653

111,971

80,069

96,114

112,250

122,207

140,227

140,098

139,032

133,617

124,515

114,728

108,395

111,906

80,178

96,765

114,379

122,722

139,987

140,209

138,756

133,527

124,153

114,263

108,056

111,808

80,574

97,343

115,876

124,118

139,804

140,171

138,314

133,365

123,756

113,782

107,750

111,988

80,878

97,816

—

126,149

139,656

139,987

137,912

133,114

123,359

113,354

107,428

112,119

81,154

98,260

—

128,339

139,546

140,209

137,547

132,791

122,929

113,024

109,640

112,316

81,374

98,552

—

129,890

—

140,486

—

132,434

122,481

—

111,873

—

Change1

+10,761

+17,012

+17,016

+13,144

+7,952

+701

–2,884

–5,058

–9,577

–9,080

–740

–346

Equivalent change2 (Mgal/d)

+347

+549

+608

+424

+265

+22.6

–96.1

–163

–309

–303

–23.9

–11.5

Equivalent change3 (ft3/s)

+537

+849

+940

+656

+410

+35.0

–149

–252

–478

–468

–37.0

–17.8

1Change is calculated as the storage on the last day of each month minus the storage on the first day of each month. Net change for the year is +41,703 million gallons; minimum and maximum storage for December through May are 70,613 and 142,322 million gallons, respectively. Minimum and maximum storage for June through November are 107,428 and 141,524 million gallons, respectively. 2The net equivalent for the year is +114.3 million gallons per day. 3The net equivalent for the year is +177 cubic feet per second.

Tables 1, 3–11, and 13–20 21 Table 4. Storage in Cannonsville Reservoir, New York, for report year ending November 30, 2017. [Delaware River Master daily operations record; gage reading at 0800 hours; data provided by New York City. Storage is given in millions of gallons above the elevation of 1,040.00 feet. Add 2,584 million gallons for total contents above sill of outlet tunnel at the elevation of 1,020.50 feet. Storage at spillway level is 95,706 million gallons. —, not applicable; Mgal/d, million gallons per day; ft3/s, cubic foot per second] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sep. 2017

Oct. 2017

Nov. 2017

19,493

33,626

53,879

80,004

89,758

95,706

96,494

93,348

86,669

77,559

62,033

45,968

20,821

33,765

54,358

81,322

91,979

96,848

96,543

93,059

86,323

77,075

60,964

46,668

21,958

33,883

54,766

82,478

93,333

98,056

96,591

92,694

86,048

76,675

59,914

47,180

22,855

34,320

55,115

83,374

94,550

98,233

96,575

92,283

85,759

76,274

58,876

47,636

23,621

35,152

55,420

84,039

96,543

98,184

96,607

91,736

85,456

75,873

57,936

48,025

24,241

35,706

55,750

84,632

97,637

98,458

98,184

91,203

85,109

75,486

56,983

48,325

24,881

36,112

56,080

84,935

99,585

98,555

99,215

90,655

84,718

75,196

56,043

48,726

25,494

36,380

56,532

85,152

100,743

98,523

99,086

90,108

84,371

74,892

55,176

49,107

26,038

36,528

57,521

85,441

100,550

98,378

98,555

89,591

83,981

74,561

54,848

49,422

26,302

36,954

58,217

85,513

99,874

98,152

97,959

88,967

83,576

74,188

54,591

49,679

26,430

37,410

58,790

85,542

99,118

97,927

97,251

88,465

83,143

73,795

54,171

49,924

26,541

37,757

59,413

85,441

98,201

97,685

96,398

88,071

82,810

73,410

53,797

50,169

26,549

39,369

60,060

85,282

97,637

97,508

95,706

87,840

82,478

73,000

53,482

50,367

26,524

40,871

60,610

85,210

97,138

97,589

95,295

88,115

82,175

72,629

52,980

50,554

26,455

41,922

61,091

85,065

96,671

97,669

95,265

88,313

81,813

72,245

52,210

50,449

26,302

42,720

61,587

85,152

96,301

97,669

95,113

88,252

81,423

71,848

51,394

50,297

26,132

43,309

61,995

85,383

96,189

97,557

95,113

88,071

81,163

71,384

50,542

50,157

26,064

44,066

62,390

85,759

96,205

97,396

94,915

88,100

80,961

71,000

49,667

50,017

27,579

44,889

62,797

85,875

95,931

97,283

94,839

87,941

81,134

70,775

48,770

49,924

28,430

45,556

63,433

86,005

95,770

97,154

95,189

87,666

81,221

70,364

47,892

49,982

29,023

46,346

64,173

85,831

96,269

96,977

95,478

87,363

81,177

70,046

46,991

50,297

29,821

47,102

64,784

85,326

97,186

96,752

95,539

87,002

80,847

69,477

46,135

50,367

30,590

47,880

65,497

84,400

97,347

96,671

95,539

86,684

80,737

68,775

45,367

50,309

31,053

48,626

66,516

83,316

97,202

96,559

95,569

86,785

80,599

68,033

44,900

50,251

31,434

49,375

68,351

82,305

96,929

96,285

95,584

87,334

80,308

67,254

44,500

50,146

31,795

50,029

73,040

81,452

96,671

96,092

95,356

87,623

79,991

66,452

43,811

50,052

32,203

50,717

76,315

81,076

96,414

95,963

95,006

87,666

79,617

65,663

43,130

49,971

32,582

51,546

78,387

81,640

96,108

95,899

94,641

87,623

79,244

64,784

42,689

50,006

32,926

52,246

—

83,215

95,787

95,803

94,215

87,479

78,830

63,942

42,331

49,866

33,130

52,864

—

85,499

95,523

95,787

93,653

87,262

78,401

63,064

42,573

50,029

33,269

53,401

—

87,305

—

96,076

—

86,973

77,987

—

44,934

—

Change1

+13,776

+19,775

+24,508

+7,301

+5,765

+370

–2,841

–6,375

–8,682

–14,494

–17,099

+4,061

Equivalent

+444

+638

+875

+236

+192

+11.9

–94.7

–206

–280

–483

–552

+135

+687

+987

+1,354

+364

+297

+18.4

–147

–318

–433

–747

–853

+209

change2 (Mgal/d) Equivalent change3 (ft3/s) 1Change is calculated as the storage on the last day of each month minus the storage on the first day of each month. Net change for the year is +30,536 million gallons; minimum and maximum storage for December through May are 19,493 and 100,743 million gallons, respectively. Minimum and maximum storage for June through November are 42,331 and 99,215 million gallons, respectively. 2The net equivalent for the year is +83.7 million gallons per day. 3The net equivalent for the year is +130 cubic feet per second.

22 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 5. Storage in Neversink Reservoir, New York, for year ending November 30, 2017. [Delaware River Master daily operations record; gage reading at 0800 hours; data provided by New York City. Storage is given in millions of gallons above the elevation of 1,319.00 feet. Add 525 million gallons for total contents above sill of outlet tunnel at the elevation of 1,314.00 feet. Storage at spillway level is 34,941 million gallons. —, not applicable; Mgal/d, million gallons per day; ft3/s, cubic foot per second] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

20,009

21,089

26,591

30,401

32,439

34,518

34,907

33,843

32,600

31,090

29,715

30,227

20,238

21,169

26,693

30,296

32,747

34,660

34,956

33,906

32,491

31,039

29,692

30,209

20,205

21,253

26,727

30,510

33,024

34,843

34,966

33,910

32,486

31,017

29,652

30,150

20,090

21,443

26,799

30,510

33,427

34,931

34,912

33,896

32,405

31,035

29,620

30,191

19,957

21,641

26,877

30,350

34,433

35,016

34,981

33,867

32,453

31,012

29,593

30,296

19,792

21,784

26,945

30,186

34,966

34,951

35,394

33,848

32,491

30,957

29,477

30,410

19,635

21,876

26,992

30,204

35,438

34,946

35,234

33,824

32,468

31,072

29,468

30,538

19,464

21,953

26,996

30,383

35,259

34,936

35,065

33,799

32,410

31,132

29,464

30,630

19,275

22,028

27,154

30,533

35,180

34,853

34,981

33,775

32,405

31,159

29,509

30,726

19,079

22,093

27,236

30,657

35,135

34,848

34,917

33,736

32,373

31,155

29,647

30,822

18,875

22,182

27,257

30,552

35,120

34,936

34,981

33,630

32,264

31,141

29,710

30,698

18,689

22,236

27,344

30,405

35,095

34,996

35,031

33,534

32,382

31,081

29,710

30,781

18,715

22,752

27,464

30,232

35,080

35,026

35,011

33,473

32,557

31,039

29,710

30,845

18,771

23,155

27,451

30,218

34,976

35,100

34,956

33,422

32,605

31,012

29,531

30,675

18,786

23,389

27,447

30,314

34,853

35,075

34,858

33,480

32,529

30,928

29,347

30,721

18,811

23,569

27,498

30,387

34,730

34,971

34,907

33,485

32,449

30,841

29,159

30,795

18,843

23,641

27,481

30,451

34,601

34,897

34,843

33,465

32,311

30,836

28,879

30,744

18,917

23,813

27,438

30,273

34,567

34,788

34,873

33,441

32,216

30,818

28,592

30,813

19,544

23,987

27,507

30,319

34,443

34,769

34,927

33,336

32,435

30,693

28,289

30,975

19,752

24,173

27,632

30,392

34,340

34,823

35,065

33,173

32,216

30,670

28,001

31,206

19,909

24,319

27,727

30,451

34,340

34,902

34,912

32,991

32,236

30,538

27,727

31,304

20,042

24,523

27,805

30,492

34,640

34,837

34,725

32,843

32,047

30,429

27,417

31,391

20,157

24,842

27,892

30,529

34,788

34,868

34,538

32,800

31,850

30,305

27,107

31,382

20,253

25,246

27,957

30,570

34,759

34,873

34,306

32,800

31,658

30,278

26,821

31,461

20,376

25,562

28,486

30,634

34,873

34,887

34,140

32,853

31,545

30,250

27,068

31,551

20,488

25,750

29,652

30,712

34,991

34,863

34,081

32,876

31,512

30,073

27,146

31,611

20,581

25,971

30,213

30,822

34,922

34,803

34,067

32,876

31,466

29,941

27,193

31,663

20,720

26,152

30,533

31,099

34,828

34,848

34,037

32,843

31,425

29,892

27,236

31,485

20,799

26,303

—

31,527

34,725

34,833

34,023

32,795

31,308

29,783

27,262

31,289

20,923

26,440

—

32,027

34,626

34,961

33,998

32,733

31,248

29,747

29,039

31,118

21,014

26,473

—

32,241

34,927

—

32,657

31,211

—

29,950

—

+1,005

+5,384

+3,942

+1,840

+409

–909

–1,186

–1,389

–1,343

+235

+891

+32.4

+174

+141

+59.4

+72.9

+13.2

–30.3

–38.3

–44.8

+7.6

+29.7

+50.1

+269

+218

+91.9

+113

+20.4

–46.9

–59.3

–69.3

+11.8

+45.9

Change1 Equivalent change2

— +2,187

(Mgal/d) Equivalent change3 (ft3/s) 1Change is calculated as the storage on the last day of each month minus the storage on the first day of each month. Net change for the year is +11,109 million gallons; minimum and maximum storage for December through May are 18,689 and 35,438 million gallons, respectively. Minimum and maximum storage for June through November are 26,821 and 35,394 million gallons, respectively. 2The net equivalent for the year is +30.4 million gallons per day. 3The net equivalent for the year is +47.0 cubic feet per second.

Tables 1, 3–11, and 13–20 23 Table 6. Diversions to New York City water supply system for report year ending November 30, 2017. [Delaware River Master daily operations record. Diversions in million gallons per day for each 24-hour period beginning 0800 local time. For December 1– May 31, the average is computed beginning June 1, 2015, to the given date. For June 1–November 30, the average is computed beginning June 1, 2016, to the given date. The diversion calculation is computed as authorized within the Decree. —, not applicable] Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

12/1/2016

263

607

1/1/2017

199

280

589

12/2/2016

106

263

606

1/2/2017

199

280

588

12/3/2016

161

263

605

1/3/2017

171

280

588

12/4/2016

159

263

604

1/4/2017

202

281

587

12/5/2016

158

262

603

1/5/2017

202

281

587

12/6/2016

158

262

602

1/6/2017

202

281

586

12/7/2016

158

262

601

1/7/2017

202

281

586

12/8/2016

335

262

601

1/8/2017

202

281

585

12/9/2016

232

180

261

601

1/9/2017

109

583

12/10/2016

158

265

261

602

1/10/2017

581

12/11/2016

158

265

261

602

1/11/2017

167

238

580

12/12/2016

158

348

602

1/12/2017

167

319

580

12/13/2016

158

359

601

1/13/2017

183

320

580

12/14/2016

158

359

601

1/14/2017

199

273

579

12/15/2016

158

359

600

1/15/2017

199

280

579

12/16/2016

158

359

600

1/16/2017

199

280

579

12/17/2016

159

359

600

1/17/2017

231

577

12/18/2016

158

360

599

1/18/2017

276

576

12/19/2016

361

598

1/19/2017

276

575

12/20/2016

362

597

1/20/2017

572

12/21/2016

200

595

1/21/2017

570

12/22/2016

301

594

1/22/2017

567

12/23/2016

301

172

593

1/23/2017

192

566

12/24/2016

301

200

593

1/24/2017

202

564

12/25/2016

301

200

592

1/25/2017

202

563 561

12/26/2016

288

591

1/26/2017

202

12/27/2016

163

334

591

1/27/2017

559

12/28/2016

164

365

591

1/28/2017

557

12/29/2016

165

366

590

1/29/2017

554

12/30/2016

186

288

590

1/30/2017

552

12/31/2016 Total

199

280

589

1/31/2017

5,475

6,310

2,908

—

Total

550

2,905

5,563

235

—

24 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 6. Diversions to New York City water supply system for report year ending November 30, 2017.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day for each 24-hour period beginning 0800 local time. For December 1– May 31, the average is computed beginning June 1, 2015, to the given date. For June 1–November 30, the average is computed beginning June 1, 2016, to the given date. The diversion calculation is computed as authorized within the Decree. —, not applicable] Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

2/1/2017

548

3/1/2017

175

450

504

2/2/2017

546

3/2/2017

401

504

2/3/2017

544

3/3/2017

347

189

504

2/4/2017

542

3/4/2017

420

299

505

540

3/5/2017

420

299

506

2/5/2017

2/6/2017

538

3/6/2017

275

308

112

507

2/7/2017

536

3/7/2017

257

474

507

2/8/2017

534

3/8/2017

249

474

508

2/9/2017

532

3/9/2017

249

474

509

2/10/2017

112

531

3/10/2017

474

223

510

2/11/2017

529

3/11/2017

454

242

510

2/12/2017

526

3/12/2017

474

248

511

2/13/2017

120

525

3/13/2017

140

473

119

512

2/14/2017

524

3/14/2017

210

474

512

2/15/2017

522

3/15/2017

210

179

512

2/16/2017

521

3/16/2017

210

141

511

2/17/2017

519

3/17/2017

211

264

511

2/18/2017

517

3/18/2017

209

191

511

2/19/2017

515

3/19/2017

211

192

510

2/20/2017

513

3/20/2017

421

510

2/21/2017

511

3/21/2017

474

510

2/22/2017

211

510

3/22/2017

474

510

2/23/2017

250

228

199

511

3/23/2017

473

510

2/24/2017

509

3/24/2017

149

473

510

2/25/2017

508

3/25/2017

214

472

511

2/26/2017

506

3/26/2017

214

472

511

2/27/2017

504

3/27/2017

214

472

512

2/28/2017

152

416

504

3/28/2017

200

473

512

1,358

285

1,154

—

3/29/2017

201

474

513

3/30/2017

201

163

513

3/31/2017

202

203

512

5,789

9,524

2,840

—

Total

Tables 1, 3–11, and 13–20 25 Table 6. Diversions to New York City water supply system for report year ending November 30, 2017.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day for each 24-hour period beginning 0800 local time. For December 1– May 31, the average is computed beginning June 1, 2015, to the given date. For June 1–November 30, the average is computed beginning June 1, 2016, to the given date. The diversion calculation is computed as authorized within the Decree. —, not applicable] East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

5/1/2017

450

503

5/2/2017

450

502

509

5/3/2017

450

502

508

5/4/2017

383

502

259

501

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

4/1/2017

203

511

4/2/2017

203

510

4/3/2017

204

4/4/2017

Date

4/5/2017

506

5/5/2017

4/6/2017

505

5/6/2017

222

236

501

4/7/2017

503

5/7/2017

409

205

502

4/8/2017

501

5/8/2017

451

226

502

4/9/2017

500

5/9/2017

451

120

502

4/10/2017

204

499

5/10/2017

451

502

4/11/2017

206

498

5/11/2017

451

502

4/12/2017

450

498

5/12/2017

286

501

4/13/2017

298

136

497

5/13/2017

253

501

4/14/2017

450

203

498

5/14/2017

434

500

4/15/2017

450

203

498

5/15/2017

417

163

501

4/16/2017

450

203

499

5/16/2017

450

194

501

4/17/2017

450

138

499

5/17/2017

450

195

502

4/18/2017

450

203

500

5/18/2017

448

107

502

4/19/2017

450

203

500

5/19/2017

400

183

502

4/20/2017

450

203

501

5/20/2017

400

200

502

4/21/2017

450

501

5/21/2017

400

200

120

503

4/22/2017

450

500

5/22/2017

385

503

4/23/2017

450

186

501

5/23/2017

375

129

503

4/24/2017

450

501

5/24/2017

252

299

503

4/25/2017

431

501

5/25/2017

252

299

151

503

4/26/2017

450

189

501

5/26/2017

295

299

179

504

4/27/2017

450

203

501

5/27/2017

323

207

504

4/28/2017

450

204

502

5/28/2017

387

200

505

4/29/2017

449

203

502

5/29/2017

215

200

504

4/30/2017

450

203

503

5/30/2017

205

142

504

9,434

2,739

—

5/31/2017

411

504

11,264

2,357

2,471

—

Total

26 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 6. Diversions to New York City water supply system for report year ending November 30, 2017.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day for each 24-hour period beginning 0800 local time. For December 1– May 31, the average is computed beginning June 1, 2015, to the given date. For June 1–November 30, the average is computed beginning June 1, 2016, to the given date. The diversion calculation is computed as authorized within the Decree. —, not applicable] Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

6/1/2017

449

7/1/2017

338

298

555

6/2/2017

449

7/2/2017

201

298

553

6/3/2017

450

472

7/3/2017

273

299

554

6/4/2017

450

467

7/4/2017

201

299

552

391

7/5/2017

333

299

554

6/5/2017

6/6/2017

137

349

7/6/2017

350

299

557

6/7/2017

411

155

380

7/7/2017

317

299

559

6/8/2017

450

204

414

7/8/2017

300

299

560

6/9/2017

446

204

440

7/9/2017

301

298

561

6/10/2017

446

444

7/10/2017

400

274

565

6/11/2017

357

251

459

7/11/2017

400

274

570

6/12/2017

241

221

464

7/12/2017

400

274

574

6/13/2017

325

198

475

7/13/2017

448

274

580

6/14/2017

308

199

100

485

7/14/2017

178

274

577

6/15/2017

350

299

496

7/15/2017

300

275

577

6/16/2017

231

133

107

494

7/16/2017

301

274

577

6/17/2017

250

201

492

7/17/2017

400

274

579

6/18/2017

250

201

489

7/18/2017

400

274

582

6/19/2017

250

477

7/19/2017

400

226

115

585

6/20/2017

420

189

483

7/20/2017

400

225

153

589

6/21/2017

448

203

491

7/21/2017

384

225

113

592

6/22/2017

444

203

499

7/22/2017

374

225

592

6/23/2017

322

261

502

7/23/2017

375

227

592

6/24/2017

380

203

506

7/24/2017

439

225

594

6/25/2017

399

223

512

7/25/2017

449

226

595

6/26/2017

401

299

519

7/26/2017

449

226

596

6/27/2017

450

299

528

7/27/2017

449

226

598

6/28/2017

450

275

535

7/28/2017

448

226

599

6/29/2017

450

299

542

7/29/2017

449

225

600

6/30/2017

449

203

190

552

7/30/2017

449

225

602

10,950

3,301

2,311

—

7/31/2017

449

225

603

11,355

8,087

769

—

Total

Tables 1, 3–11, and 13–20 27 Table 6. Diversions to New York City water supply system for report year ending November 30, 2017.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day for each 24-hour period beginning 0800 local time. For December 1– May 31, the average is computed beginning June 1, 2015, to the given date. For June 1–November 30, the average is computed beginning June 1, 2016, to the given date. The diversion calculation is computed as authorized within the Decree. —, not applicable] East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

9/1/2017

450

299

634

9/2/2017

377

300

634

610

9/3/2017

377

300

634

612

9/4/2017

377

299

635

376

296

636

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

8/1/2017

449

225

605

8/2/2017

449

225

608

8/3/2017

450

225

8/4/2017

450

225

Date

8/5/2017

451

225

613

9/5/2017

8/6/2017

451

225

614

9/6/2017

299

633

8/7/2017

449

224

615

9/7/2017

299

629

8/8/2017

451

225

616

9/8/2017

273

299

629

8/9/2017

451

224

617

9/9/2017

325

299

629

8/10/2017

450

224

619

9/10/2017

325

298

629

8/11/2017

451

199

619

9/11/2017

328

296

629

8/12/2017

451

199

620

9/12/2017

326

299

629

8/13/2017

451

199

620

9/13/2017

326

299

629

8/14/2017

451

199

621

9/14/2017

327

299

630

8/15/2017

451

199

623

9/15/2017

400

299

631

8/16/2017

451

134

623

9/16/2017

400

299

632

8/17/2017

451

622

9/17/2017

400

299

632

8/18/2017

450

134

622

9/18/2017

400

202

115

633

8/19/2017

450

619

9/19/2017

400

202

633

8/20/2017

451

617

9/20/2017

400

201

116

634

8/21/2017

450

223

172

620

9/21/2017

400

201

634

8/22/2017

450

224

191

623

9/22/2017

448

201

635

8/23/2017

420

224

191

626

9/23/2017

450

201

635

8/24/2017

450

224

627

9/24/2017

449

200

636

8/25/2017

450

224

628

9/25/2017

449

194

153

637

8/26/2017

450

224

628

9/26/2017

449

200

115

638

8/27/2017

450

224

629

9/27/2017

449

200

638

8/28/2017

450

224

630

9/28/2017

451

200

639

8/29/2017

450

225

631

9/29/2017

306

202

638

8/30/2017

450

224

631

9/30/2017

450

299

639

8/31/2017

450

224

632

Total

10,889

7,781

1,073

—

13,929

5,773

1,698

—

Total

28 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 6. Diversions to New York City water supply system for report year ending November 30, 2017.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day for each 24-hour period beginning 0800 local time. For December 1– May 31, the average is computed beginning June 1, 2015, to the given date. For June 1–November 30, the average is computed beginning June 1, 2016, to the given date. The diversion calculation is computed as authorized within the Decree. —, not applicable] Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

10/1/2017

450

298

640

11/1/2017

401

253

627

10/2/2017

450

299

640

11/2/2017

401

255

627

10/3/2017

450

298

641

11/3/2017

401

626

10/4/2017

450

298

642

11/4/2017

418

625

10/5/2017

450

301

117

644

11/5/2017

401

623

10/6/2017

450

300

645

11/6/2017

401

622

10/7/2017

450

300

646

11/7/2017

401

621

10/8/2017

450

299

646

11/8/2017

401

619

10/9/2017

641

11/9/2017

401

618

10/10/2017

637

11/10/2017

401

226

618

10/11/2017

632

11/11/2017

401

617

10/12/2017

123

628

11/12/2017

401

615

10/13/2017

299

195

627

11/13/2017

441

226

616

10/14/2017

299

202

627

11/14/2017

451

300

616

10/15/2017

299

202

626

11/15/2017

376

300

617

10/16/2017

300

299

626

11/16/2017

451

301

153

618

10/17/2017

300

303

625

11/17/2017

302

301

618

10/18/2017

299

303

625

11/18/2017

302

301

618

10/19/2017

299

303

625

11/19/2017

302

300

618

10/20/2017

298

303

625

11/20/2017

615

10/21/2017

298

302

625

11/21/2017

217

174

613

10/22/2017

298

302

625

11/22/2017

302

300

114

614

10/23/2017

290

291

279

626

11/23/2017

302

300

614

10/24/2017

400

291

627

11/24/2017

302

300

614

10/25/2017

401

299

628

11/25/2017

302

300

614 613

10/26/2017

401

299

628

11/26/2017

289

268

10/27/2017

401

299

628

11/27/2017

171

228

612

10/28/2017

401

299

629

11/28/2017

286

228

612

10/29/2017

401

299

629

11/29/2017

226

610

10/30/2017

401

628

11/30/2017

302

298

610

Total

9,474

4,201

1,996

—

10/31/2017 Total

401

627

7,185

7,608

3,165

—

Tables 1, 3–11, and 13–20 29 Table 7. Consumption of water by New York City, 1950–2017. [Data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. Mgal/d, million gallons per day]

Average daily consumption Year

Total (Mgal/d)

Annual consumption (in billions of gallons)

City proper (Mgal/d)

Outside communities (Mgal/d)

1950

953.3

29.1

982.4

358.6

1951

1,041.9

28.1

1,070.0

390.6

1952

1,087.0

32.7

1,119.7

409.8

1953

1,093.9

44.6

1,138.5

415.6

1954

1,063.4

46.3

1,109.7

405.0

1955

1,109.9

45.3

1,155.2

421.6

1956

1,111.3

48.9

1,160.2

424.6

1957

1,169.0

57.2

1,226.2

447.6

1958

1,152.9

49.6

1,202.5

438.9

1959

1,204.3

60.3

1,264.6

461.6

1960

1,199.4

58.9

1,258.3

460.5

1961

1,221.0

64.0

1,285.0

469.0

1962

1,207.6

68.8

1,276.4

465.9

1963

1,218.0

76.7

1,294.7

472.6

1964

1,189.2

79.4

1,268.6

464.3

1965

1,052.1

71.2

1,123.3

410.0

1966

1,044.9

73.2

1,118.1

408.1

1967

1,135.3

71.0

1,206.3

440.3

1968

1,242.0

78.2

1,320.2

483.2

1969

1,328.7

80.1

1,408.8

514.2

1970

1,400.3

90.4

1,490.7

544.1

1971

1,423.6

87.9

1,511.5

551.7

1972

1,412.4

83.0

1,495.4

547.3

1973

1,448.9

95.4

1,544.3

563.7

1974

1,441.8

96.3

1,538.1

561.4

1975

1,415.0

92.1

1,507.1

550.1

1976

1,435.0

95.8

1,530.8

560.3

1977

1,483.0

104.7

1,587.7

579.5

1978

1,479.4

103.0

1,582.4

577.6

1979

1,513.0

104.6

1,617.6

590.4

1980

1,506.3

110.1

1,616.3

591.6

1981

1,309.5

100.0

1,409.5

514.5

1982

1,383.0

104.8

1,487.8

543.1

1983

1,424.2

112.6

1,536.8

561.0

1984

1,465.2

113.9

1,579.1

578.0

1985

1,325.4

106.5

1,431.9

522.7

1986

1,351.1

115.2

1,466.3

535.2

1987

1,447.1

119.8

1,566.9

571.9

1988

1,484.3

125.6

1,609.9

589.1

1989

1,402.0

113.4

1,515.4

553.2

1990

1,424.4

122.4

1,546.8

564.6

30 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 7. Consumption of water by New York City, 1950–2017.—Continued [Data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. Mgal/d, million gallons per day]

Average daily consumption City proper (Mgal/d)

Outside communities (Mgal/d)

Total (Mgal/d)

Annual consumption (in billions of gallons)

1991

1,469.9

123.6

1,593.5

581.6

1992

1,368.7

113.9

1,482.6

542.6

1993

1,368.9

118.8

1,487.7

543.0

1994

1,357.8

119.2

1,477.0

539.1

1995

1,326.1

123.1

1,449.2

529.0

1996

1,283.5

120.2

1,403.7

512.4

1997

1,201.3

123.5

1,324.8

483.6

1998

1,220.0

124.7

1,344.7

490.8

1999

1,237.2

128.6

1,365.8

498.5

2000

1,240.4

124.9

1,365.3

499.7

2001

1,184.0

128.4

1,312.4

479.0

2002

1,135.6

121.1

1,256.7

458.7

2003

1,093.7

115.9

1,209.6

441.5

2004

1,099.6

117.5

1,217.1

445.5

2005

1,107.6

123.8

1,231.4

449.5

2006

1,069.2

116.8

1,186.0

432.9

2007

1,114.0

122.9

1,237.0

451.5

2008

1,082.9

114.8

1,197.7

438.4

2009

1,007.2

109.4

1,116.6

407.6

2010

1,039.0

119.0

1,158.0

422.7

2011

1,021.0

116.0

1,137.0

415.0

2012

1,009.1

110.2

1,119.3

409.7

2013

1,006.1

110.1

1,116.2

407.4

2014

996.0

109.6

1,105.6

403.5

2015

1,009.8

114.1

1,123.9

410.2

2016

1,001.6

113.5

1,115.1

408.1

2017

990.2

109.3

1,099.5

401.3

Year

Tables 1, 3–11, and 13–20 31 Table 8. Diversions by New Jersey, daily mean discharge, Delaware and Raritan Canal at Port Mercer, New Jersey (U.S. Geological Survey site number 01460440), for year ending November 30, 2017. [U.S. Geological Survey (2019e). All values except total are in million gallons per day, Mgal/d. Total in million gallons, Mgal; e, estimated; —, not applicable] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

100

Nov. 2017 98

101

102

101

103

104

103

106

100

107

104

103

104

101

103

104

102

103

102

106

103

104

103

104

85e

101

104

86e

101

105

86e

102

106

105

107

104

106

105

106

105

104

105

100

105

101

105

101

103

—

101

103

—

100

102

—

Total1

2,235

2,316

2,501

2,577

2,439

2,532

2,491

2,665

2,815

2,884

3,164

3,107

Mean2

72.1

74.7

89.3

83.1

1The year’s total is 31,726 million gallons. 2The combined mean is 86.9 million gallons per day.

81.3

81.7

83.0

86.0

90.8

96.1

102.1

103.6

[Delaware River Master daily operations record. The Montague design rate was 1,650 cubic feet per second (ft3/s) from December 1, 2016, through January 18, 2017, when a drought watch was ended. The Montague flow objective was 1,750 ft3/s from January 19, 2017, until June 15, 2017, when the flow objective was increased to 1,858 ft3/sec to account for excess release flows. The Montage flow objective returned to 1,750 ft3/s on October 23, 2017, when the 2017 Flexible Flow Management Program became effective. The Montague design rate was 1,750 (ft3/s) for the remainder of the year. Column (col.) 1 was provided by electric utility Brookfield Renewable U.S.; col. 2 was provided by electric utility Eagle Creek Renewable Energy, LLC; col. 3 computed using baseflow recession curve of uncontrolled runoff at the Montague site; col. 4 computed increase in runoff based on quantitative precipitation forecasts; col 5 = col. 1 + col. 2 + col. 3 + col. 4; col. 6 = design rate – col. 5, when positive, otherwise col. 6 = 0; col. 7 = col. 14 ( 4 days earlier); col. 8, directed release amount from the Office of the Delaware River Master = col. 6 + col. 7, when positive, otherwise, col. 8 = 0; col. 9 = col. 7 from table 10; col. 10 = summation of col. 9; col. 11 = flow objective – (col. 9 + col. 10 from table 10) when positive, otherwise, col. 11 = 0; col. 12 = summation of col. 11; col. 13 = col. 10 – col. 12; col. 14 = col. 13 divided by –10, limited to +/– 50 ft3/s. ft3/s, cols. 10, 12, 13, and 14 are accumulated from the previous water year starting June 1, 2016, with these values being reset on June 1, 2017; –x, a miscalculation of cumulative adjusted directed release occurred—values are reported as originally calculated] Advance estimate of discharge of Delaware River at Montague, New Jersey, exclusive of New York City

Computation of balancing adjustment

reservoir releases Powerplant release forecasts Date of

Uncontrolled runoff Discharge

Indicated

Balancing

deficiency

adjustment

Directed

Adjusted directed

release

(ft3/s)

Actual deficiency

Cumulative

Balancing

difference

adjustment

(ft3/s-d)

(ft3/s)

Col. 13

Col. 14

Rio

Current

Weather

Montague

Reservoir

condition

adjustment

date

(ft3/s)

Col. 1

Col. 2

Col. 3

Col. 4

8/4/2017

140

1,440

317

8/7/2017

1,950

8/5/2017

222

106

1,600

575

8/8/2017

2,503

235

–235

8/6/2017

140

106

1,685

494

8/9/2017

2,425

144

379

–379

8/7/2017

280

1,739

8/10/2017

2,154

412

–412

8/8/2017

280

1,550

8/11/2017

1,830

130

542

–542

8/9/2017

484

1,405

8/12/2017

1,894

542

–542

50 30

advance

Lake Wallenpau-

estimate

pack (ft3/s)

(ft3/s)

Col. 5

Col. 6

Col. 7

Col. 8

Daily

Cumulative

Daily

Cumulative

(ft3/s)

(ft3/s-d)

(ft3/s)

(ft3/s-d)

Col. 9

Col. 10

Col. 11

Col. 12

The estimated Montague discharge was greater than the Montague design rate from 12/1/2016 to 8/6/2017

8/10/2017

140

1,450

8/13/2017

1,617

241

279

†241

542

–301

8/11/2017

140

1,360

125

8/14/2017

1,625

233

274

†474

542

–68

8/12/2017

226

1,450

8/15/2017

1,694

164

214

†638

542

–10

8/13/2017

226

1,808

8/16/2017

2,039

638

560

–8

8/14/2017

468

1,951

8/17/2017

2,421

638

560

–8

8/15/2017

392

1,780

8/18/2017

2,195

638

560

–8

8/16/2017

430

1,550

8/19/2017

2,025

–10

638

560

–8

8/17/2017

140

177

1,390

8/20/2017

1,765

–8

638

560

–8

8/18/2017

140

1,370

130

8/21/2017

1,640

218

–8

210

848

560

288

–29

8/19/2017

602

1,308

8/22/2017

1,910

–8

848

560

288

–29

8/20/2017

602

1,700

8/23/2017

2,335

–8

848

560

288

–29

8/21/2017

640

1,790

105

8/24/2017

2,535

–8

848

560

288

–29

8/22/2017

441

1,830

103

8/25/2017

2,374

–29

848

560

288

–29

8/23/2017

527

1,685

8/26/2017

2,212

–29

848

560

288

–29

8/24/2017

140

1,700

8/27/2017

1,840

–29

848

214

774

–7

8/25/2017

151

1,750

8/28/2017

1,901

–29

848

364

1,138

–290

32 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Table 9. New York City reservoir release design data for report year ending November 30, 2017.

Table 9. New York City reservoir release design data for report year ending November 30, 2017.—Continued [Delaware River Master daily operations record. The Montague design rate was 1,650 cubic feet per second (ft3/s) from December 1, 2016, through January 18, 2017, when a drought watch was ended. The Montague flow objective was 1,750 ft3/s from January 19, 2017, until June 15, 2017, when the flow objective was increased to 1,858 ft3/sec to account for excess release flows. The Montage flow objective returned to 1,750 ft3/s on October 23, 2017, when the 2017 Flexible Flow Management Program became effective. The Montague design rate was 1,750 (ft3/s) for the remainder of the year. Column (col.) 1 was provided by electric utility Brookfield Renewable U.S.; col. 2 was provided by electric utility Eagle Creek Renewable Energy, LLC; col. 3 computed using baseflow recession curve of uncontrolled runoff at the Montague site; col. 4 computed increase in runoff based on quantitative precipitation forecasts; col 5 = col. 1 + col. 2 + col. 3 + col. 4; col. 6 = design rate – col. 5, when positive, otherwise col. 6 = 0; col. 7 = col. 14 ( 4 days earlier); col. 8, directed release amount from the Office of the Delaware River Master = col. 6 + col. 7, when positive, otherwise col. 8 = 0; col. 9 = col. 7 from table 10; col. 10 = summation of col. 9; col. 11 = flow objective – (col. 9 + col. 10 from table 10) when positive, otherwise, col. 11 = 0; col. 12 = summation of col. 11; col. 13 = col. 10 – col. 12; col. 14 = col. 13 divided by –10, limited to +/– 50 ft3/s. ft3/s, cols. 10, 12, 13, and 14 are accumulated from the previous water year starting June 1, 2016, with these values being reset on June 1, 2017; –x, a miscalculation of cumulative adjusted directed release occurred—values are reported as originally calculated] Advance estimate of discharge of Delaware River at Montague, New Jersey, exclusive of New York City

Computation of balancing adjustment

reservoir releases Powerplant release forecasts Date of

Uncontrolled runoff

Lake

Rio

Current

Weather

Montague

Wallenpaupack

Reservoir

condition

adjustment

date

(ft3/s)

Col. 1

Col. 2

Col. 3

Col. 4

8/26/2017

650

1,680

8/27/2017

699

1,420

8/28/2017

575

1,320

8/29/2017

575

1,200

8/30/2017

172

8/31/2017

140

9/1/2017

140

9/2/2017 9/3/2017

advance estimate

Discharge

Indicated

Balancing

deficiency

adjustment

(ft3/s)

Directed

Adjusted directed

release

(ft3/s)

Actual deficiency

Cumulative

Balancing

difference

adjustment

(ft3/s-d)

(ft3/s)

Daily

Cumulative

Daily

Cumulative

(ft3/s)

(ft3/s-d)

(ft3/s)

(ft3/s-d)

Col. 11

Col. 12

Col. 13

Col. 14

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

8/29/2017

2,330

–29

848

1,179

–331

8/30/2017

2,123

–29

848

213

1,392

–544

8/31/2017

1,895

–7

848

194

1,586

–738

9/1/2017

1,778

848

190

1,776

–928

1,120

9/2/2017

1,296

562

595

1,443

827

2,603

–1,160

1,105

9/3/2017

1,267

591

641

2,084

789

3,392

–1,308

1,085

120

9/4/2017

1,345

513

563

2,647

489

3,881

–1,234

317

954

315

9/5/2017

1,586

272

322

2,969

125

4,006

–1,037

650

933

246

9/6/2017

1,900

2,969

4,006

–1,037

9/4/2017

650

1,025

558

9/7/2017

2,233

2,969

4,006

–1,037

9/5/2017

398

1,035

419

9/8/2017

1,852

2,969

4,006

–1,037

9/6/2017

398

1,100

9/9/2017

1,567

291

341

3,310

4,006

–696

9/7/2017

1,200

1,160

9/10/2017

2,371

3,310

4,006

–696

9/8/2017

1,200

1,705

9/11/2017

2,910

3,310

4,006

–696

9/9/2017

688

1,830

9/12/2017

2,518

3,310

4,006

–696

9/10/2017

1,680

9/13/2017

1,680

178

228

3,538

111

4,117

–579

9/11/2017

564

1,430

9/14/2017

1,994

3,538

122

4,239

–701

9/12/2017

602

1,305

9/15/2017

1,940

3,538

150

4,389

–851

9/13/2017

591

1,150

9/16/2017

1,741

117

167

3,705

4,389

–684

9/14/2017

177

1,065

131

9/17/2017

1,373

485

535

549

4,254

317

4,706

–452

9/15/2017

1,090

9/18/2017

1,090

768

818

823

5,077

331

5,037

–4

9/16/2017

543

1,000

9/19/2017

1,543

315

365

5,442

323

5,360

–8

9/17/2017

405

1,100

9/20/2017

1,508

350

400

426

5,868

544

5,904

–36

Tables 1, 3–11, and 13–20 33

Col. 5

[Delaware River Master daily operations record. The Montague design rate was 1,650 cubic feet per second (ft3/s) from December 1, 2016, through January 18, 2017, when a drought watch was ended. The Montague flow objective was 1,750 ft3/s from January 19, 2017, until June 15, 2017, when the flow objective was increased to 1,858 ft3/sec to account for excess release flows. The Montage flow objective returned to 1,750 ft3/s on October 23, 2017, when the 2017 Flexible Flow Management Program became effective. The Montague design rate was 1,750 (ft3/s) for the remainder of the year. Column (col.) 1 was provided by electric utility Brookfield Renewable U.S.; col. 2 was provided by electric utility Eagle Creek Renewable Energy, LLC; col. 3 computed using baseflow recession curve of uncontrolled runoff at the Montague site; col. 4 computed increase in runoff based on quantitative precipitation forecasts; col 5 = col. 1 + col. 2 + col. 3 + col. 4; col. 6 = design rate – col. 5, when positive, otherwise col. 6 = 0; col. 7 = col. 14 ( 4 days earlier); col. 8, directed release amount from the Office of the Delaware River Master = col. 6 + col. 7, when positive, otherwise col. 8 = 0; col. 9 = col. 7 from table 10; col. 10 = summation of col. 9; col. 11 = flow objective – (col. 9 + col. 10 from table 10) when positive, otherwise, col. 11 = 0; col. 12 = summation of col. 11; col. 13 = col. 10 – col. 12; col. 14 = col. 13 divided by –10, limited to +/– 50 ft3/s. ft3/s, cols. 10, 12, 13, and 14 are accumulated from the previous water year starting June 1, 2016, with these values being reset on June 1, 2017; –x, a miscalculation of cumulative adjusted directed release occurred—values are reported as originally calculated] Advance estimate of discharge of Delaware River at Montague, New Jersey, exclusive of New York City

Computation of balancing adjustment

reservoir releases Powerplant release forecasts Date of

Uncontrolled runoff

Lake

Rio

Current

Weather

Montague

Wallenpaupack

Reservoir

condition

adjustment

date

(ft3/s)

Col. 1

Col. 2

Col. 3

Col. 4

9/18/2017

269

1,050

9/19/2017

269

1,037

9/20/2017

129

933

9/21/2017

129

9/22/2017

129

9/23/2017

323

9/24/2017

advance estimate

Discharge

Indicated

Balancing

deficiency

adjustment

(ft3/s)

Directed

Adjusted directed

release

(ft3/s)

Actual deficiency

Daily

Cumulative

Daily

Cumulative

(ft3/s)

(ft3/s-d)

(ft3/s)

(ft3/s-d)

Cumulative

Balancing

difference

adjustment

(ft3/s-d)

(ft3/s)

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

9/21/2017

1,332

526

571

568

6,436

726

6,630

–194

9/22/2017

1,306

552

–4

548

6,984

786

7,416

–432

9/23/2017

1,062

796

–8

788

781

7,765

879

8,295

–530

733

9/24/2017

862

996

1,000

993

8,758

731

9,026

–268

600

9/25/2017

729

1,129

1,148

1,143

9,901

631

9,657

244

–24

600

9/26/2017

923

935

978

1,173

11,074

721

10,378

696

–50

274

465

9/27/2017

739

1,119

1,169

1,307

12,381

855

11,233

1,148

–50

9/25/2017

226

490

9/28/2017

716

1,142

1,169

1,191

13,572

849

12,082

1,490

–50

9/26/2017

430

9/29/2017

442

1,416

–24

1,392

14,964

1,320

13,402

1,562

–50

9/27/2017

430

9/30/2017

516

1,342

–50

1,292

1,274

16,238

1,272

14,674

1,564

–50

9/28/2017

400

10/1/2017

412

1,446

–50

1,396

1,386

17,624

1,314

15,988

1,636

–50

9/29/2017

410

10/2/2017

416

1,442

–50

1,392

1,387

19,011

1,285

17,273

1,738

–50

9/30/2017

350

10/3/2017

350

1,508

–50

1,458

1,453

20,464

1,251

18,524

1,940

–50

10/1/2017

350

10/4/2017

350

1,508

–50

1,458

1,452

21,916

1,090

19,614

2,302

–50

10/2/2017

350

10/5/2017

350

1,508

–50

1,458

1,453

23,369

1,261

20,875

2,494

–50

10/3/2017

500

10/6/2017

500

1,358

–50

1,308

1,306

24,675

1,264

22,139

2,536

–50

10/4/2017

500

10/7/2017

545

1,313

–50

1,263

1,260

25,935

1,198

23,337

2,598

–50

10/5/2017

500

10/8/2017

531

1,327

–50

1,277

1,272

27,207

1,210

24,547

2,660

–50

10/6/2017

500

10/9/2017

540

1,318

–50

1,268

1,261

28,468

879

25,426

3,042

–50

10/7/2017

500

2,245

10/10/2017

2,745

–50

28,468

369

25,795

2,673

–50

10/8/2017

500

700

10/11/2017

1,200

658

–50

608

605

29,073

353

26,148

2,925

–50

10/9/2017

600

200

10/12/2017

800

1,058

–50

1,008

1,005

30,078

663

26,811

3,267

–50

10/10/2017

700

100

10/13/2017

800

1,058

–50

1,008

1,010

31,088

898

27,709

3,379

–50

34 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Table 9. New York City reservoir release design data for report year ending November 30, 2017.—Continued

Computation of balancing adjustment

reservoir releases Powerplant release forecasts Date of advance estimate

Uncontrolled runoff

Lake

Rio

Current

Weather

Montague

Wallenpaupack

Reservoir

condition

adjustment

date

(ft3/s)

Col. 1

Col. 2

Col. 3

Col. 4

Discharge

Indicated

Balancing

deficiency

adjustment

(ft3/s)

Directed

Adjusted directed

release

(ft3/s)

Actual deficiency

Daily

Cumulative

Daily

Cumulative

(ft3/s)

(ft3/s-d)

(ft3/s)

(ft3/s-d)

Cumulative

Balancing

difference

adjustment

(ft3/s-d)

(ft3/s)

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

10/11/2017

1,100

10/14/2017

1,158

700

–50

650

638

31,726

886

28,595

3,131

–50

10/12/2017

177

1,200

10/15/2017

1,377

481

–50

431

434

32,160

762

29,357

2,803

–50

10/13/2017

900

10/16/2017

900

958

–50

908

924

33,084

1,072

30,429

2,655

–50

10/14/2017

800

10/17/2017

800

1,058

–50

1,008

1,009

34,093

1,007

31,436

2,657

–50

10/15/2017

700

10/18/2017

700

1,158

–50

1,108

1,103

35,196

1,051

32,487

2,709

–50

10/16/2017

700

10/19/2017

700

1,158

–50

1,108

1,102

36,298

1,070

33,557

2,741

–50

10/17/2017

650

10/20/2017

650

1,208

–50

1,158

1,155

37,453

1,133

34,690

2,763

–50

10/18/2017

650

10/21/2017

650

1,208

–50

1,158

1,156

38,609

1,164

35,854

2,755

–50

10/19/2017

650

10/22/2017

650

1,208

–50

1,158

1,157

39,766

1,165

37,019

2,747

–50

10/20/2017

650

10/23/2017

650

1,208

–50

1,158

1,156

40,922

1,194

38,213

2,709

–50

10/21/2017

640

10/24/2017

648

1,210

–50

1,160

1,045

41,967

925

39,138

2,829

–50

630

2,995

10/25/2017

3,625

–50

315

39,453

3,089

–50

10/23/2017

630

300

10/26/2017

930

820

–50

770

713

43,255

233

39,686

3,569

–50

10/24/2017

600

300

10/27/2017

900

850

–50

800

796

44,051

206

39,892

4,159

–50

10/25/2017

650

10/28/2017

721

1,029

–50

979

972

45,023

542

40,434

4,589

–50

10/26/2017

650

1,100

10/29/2017

1,750

–50

†45,592

389

40,823

4,769

–50

10/27/2017

1,000

3,000

10/30/2017

4,000

–50

45,592

40,823

4,769

–50

10/28/2017

1,000

8,500

10/31/2017

9,500

–50

45,592

40,823

4,769

–50

The estimated Montague discharge was greater than the Montague design rate from 11/1/2017 to 11/30/2017 †A miscalculation of cumulative adjusted directed release occurred—values are reported as originally calculated.

Tables 1, 3–11, and 13–20 35

10/22/2017

†42,542

[Delaware River Master daily operations record. All provided measurements are given in the mean discharge in cubic feet per second (ft3/s) for 24 hours, except col. 14, which is in cubic feet per second accumulated daily. Column (col.) 1 = directed release ordered by the Office of the Delaware River Master; col. 2 = 24 hours beginning 1200 of date shown; col. 3 = 24 hours ending 2400, 1 day later; col. 4 = 24 hours beginning 1500, 1 day later; col. 5 = 24 hours beginning 0000 of date shown; col. 6 = 24 hours beginning 1600 of date shown; col. 7 = col. 2 + col. 3 + col. 4 in response to direction (col. 1); col. 8 = col. 2 + col. 3 + col. 4 – col. 7; col. 9 = col. 5 + col. 6; col. 10 = col. 11 – col. 7 – col. 8 – col. 9; col. 11 = 24 hours of calendar day shown; col. 12 = Interim Excess Release Quantity (IERQ) Bank releases. From 6/1/2017 to 10/23/2017 thermal releases were allowed per Delaware River Basin Commission Docket no. D–77–20 CP (Revised). Table footnotes in col. 12 indicate thermal release or Rapid Flow Change Mitigation Bank—refer to table footnotes. Starting on 10/23/2017, releases were made from 2017 Flexible Flow Management Program IERQ Banks; col. 13: if col. 7 > 0, col. 13 = col. 11 – col 8 –1,750 ft3/s but not greater than col. 7; if col 7 = 0, col. 13 = 1,858 ft3/s – (col. 11 – col. 8), positive values only and not greater than 108 ft3/s; col. 14 = cumulative summation of col. 13 values. Excess release credits were only applicable from June 1 to October 23, 2017. —, not applicable] Controlled releases from New York City reservoirs

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Controlled releases Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

11/28/2016

11/30/2016

11/29/2016

12/1/2016

11/30/2016

12/2/2016

12/1/2016

12/3/2016

12/2/2016

12/3/2016

12/4/2016

12/5/2016

12/6/2016

12/7/2016

Date

Excess release credits

Amount

Date

IERQ

New York City reservoirs

Date

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

12/1/2016

128

5,952

6,080

—

12/2/2016

128

8,872

9,000

—

12/3/2016

130

6,070

6,200

—

12/4/2016

130

4,560

4,690

—

12/4/2016

12/5/2016

131

3,709

3,840

—

12/5/2016

12/6/2016

131

3,249

3,380

—

12/6/2016

12/7/2016

131

3,079

3,210

—

12/7/2016

12/8/2016

132

3,088

3,220

—

12/8/2016

12/9/2016

130

3,030

3,160

—

12/9/2016

12/10/2016

130

2,640

2,770

—

12/8/2016

12/10/2016

12/11/2016

124

2,286

2,410

—

12/9/2016

12/11/2016

12/12/2016

127

2,133

2,260

—

12/10/2016

12/12/2016

12/13/2016

133

2,057

2,190

—

12/11/2016

12/13/2016

12/14/2016

130

2,150

2,280

—

12/12/2016

12/14/2016

12/15/2016

130

2,002

2,150

—

12/13/2016

12/15/2016

124

12/16/2016

130

124

2,246

2,500

—

12/14/2016

12/16/2016

106

12/17/2016

130

106

1,524

1,760

—

12/15/2016

12/17/2016

12/18/2016

130

1,670

1,800

—

12/16/2016

12/18/2016

12/19/2016

130

7,810

7,940

—

12/17/2016

12/19/2016

12/20/2016

130

7,720

7,850

—

12/18/2016

12/20/2016

12/21/2016

130

5,320

5,450

—

12/19/2016

12/21/2016

12/22/2016

131

4,509

4,640

—

12/20/2016

12/22/2016

12/23/2016

131

4,259

4,390

—

12/21/2016

12/23/2016

12/24/2016

131

3,589

3,720

—

12/22/2016

12/24/2016

12/25/2016

131

3,309

3,440

—

12/23/2016

12/25/2016

12/26/2016

131

3,349

3,480

—

36 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Table 10. Controlled releases from reservoirs in the upper Delaware River Basin and segregation of flow of Delaware River at Montague, New Jersey, for report year ending November 30, 2017.

Table 10. Controlled releases from reservoirs in the upper Delaware River Basin and segregation of flow of Delaware River at Montague, New Jersey, for report year ending November 30, 2017.—Continued [Delaware River Master daily operations record. All provided measurements are given in the mean discharge in cubic feet per second (ft3/s) for 24 hours, except col. 14, which is in cubic feet per second accumulated daily. Column (col.) 1 = directed release ordered by the Office of the Delaware River Master; col. 2 = 24 hours beginning 1200 of date shown; col. 3 = 24 hours ending 2400, 1 day later; col. 4 = 24 hours beginning 1500, 1 day later; col. 5 = 24 hours beginning 0000 of date shown; col. 6 = 24 hours beginning 1600 of date shown; col. 7 = col. 2 + col. 3 + col. 4 in response to direction (col. 1); col. 8 = col. 2 + col. 3 + col. 4 – col. 7; col. 9 = col. 5 + col. 6; col. 10 = col. 11 – col. 7 – col. 8 – col. 9; col. 11 = 24 hours of calendar day shown; col. 12 = Interim Excess Release Quantity (IERQ) Bank releases. From 6/1/2017 to 10/23/2017 thermal releases were allowed per Delaware River Basin Commission Docket no. D–77–20 CP (Revised). Table footnotes in col. 12 indicate thermal release or Rapid Flow Change Mitigation Bank—refer to table footnotes. Starting on 10/23/2017, releases were made from 2017 Flexible Flow Management Program IERQ Banks; col. 13: if col. 7 > 0, col. 13 = col. 11 – col 8 –1,750 ft3/s but not greater than col. 7; if col 7 = 0, col. 13 = 1,858 ft3/s – (col. 11 – col. 8), positive values only and not greater than 108 ft3/s; col. 14 = cumulative summation of col. 13 values. Excess release credits were only applicable from June 1 to October 23, 2017. —, not applicable] Controlled releases from New York City reservoirs

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

12/24/2016

12/26/2016

12/25/2016

12/27/2016

12/26/2016

12/28/2016

12/27/2016

12/29/2016

12/28/2016

12/29/2016

12/30/2016

12/31/2016

1/1/2017

1/2/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City reservoirs

Date

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

12/27/2016

131

3,259

3,390

—

12/28/2016

131

3,719

3,850

—

12/29/2016

131

4,079

4,210

—

12/30/2016

131

3,619

3,750

—

12/30/2016

12/31/2016

131

3,299

3,430

—

12/31/2016

1/1/2017

131

3,019

3,150

—

1/1/2017

1/2/2017

130

2,780

2,910

—

1/2/2017

1/3/2017

130

2,660

2,790

—

1/3/2017

1/4/2017

130

3,910

4,040

—

1/4/2017

1/5/2017

131

6,889

7,020

—

1/3/2017

1/5/2017

1/6/2017

131

5,739

5,870

—

1/4/2017

1/6/2017

1/7/2017

131

4,401

4,550

—

1/5/2017

1/7/2017

1/8/2017

132

3,957

4,160

—

1/6/2017

1/8/2017

195

1/9/2017

132

195

3,493

3,820

—

1/7/2017

1/9/2017

160

1/10/2017

132

177

3,231

3,540

—

1/8/2017

1/10/2017

1/11/2017

130

3,159

3,360

—

1/9/2017

1/11/2017

1/12/2017

129

3,901

4,030

—

1/10/2017

1/12/2017

160

1/13/2017

128

160

7,052

7,340

—

1/11/2017

1/13/2017

1/14/2017

131

10,680

10,900

—

1/12/2017

1/14/2017

1/15/2017

134

7,756

7,890

—

1/13/2017

1/15/2017

1/16/2017

134

6,036

6,170

—

1/14/2017

1/16/2017

1/17/2017

131

4,950

5,170

—

1/15/2017

1/17/2017

1/18/2017

130

5,294

5,500

—

1/16/2017

1/18/2017

1/19/2017

130

6,067

6,250

—

1/17/2017

1/19/2017

177

1/20/2017

130

177

5,783

6,090

—

1/18/2017

1/20/2017

124

1/21/2017

130

124

5,226

5,480

—

Tables 1, 3–11, and 13–20 37

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6 124

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

1/19/2017

1/21/2017

1/20/2017

1/22/2017

1/21/2017

1/23/2017

1/22/2017

1/24/2017

1/23/2017

1/25/2017

1/24/2017

1/25/2017

1/26/2017

1/27/2017

1/28/2017

1/29/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City Date

reservoirs

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

1/22/2017

130

124

5,066

5,320

—

1/23/2017

131

5,519

5,650

—

248

1/24/2017

132

248

8,960

9,340

—

390

1/25/2017

130

390

11,980

12,500

—

426

1/26/2017

128

426

9,116

9,670

—

1/26/2017

461

1/27/2017

130

461

8,659

9,250

—

1/27/2017

443

1/28/2017

130

443

7,477

8,050

—

1/28/2017

408

1/29/2017

128

408

6,244

6,780

—

1/29/2017

496

1/30/2017

128

496

5,526

6,150

—

1/30/2017

365

496

1/31/2017

130

861

4,639

5,630

—

1/31/2017

130

514

2/1/2017

131

644

3,945

4,720

—

1/30/2017

2/1/2017

514

2/2/2017

131

555

3,794

4,480

—

1/31/2017

2/2/2017

352

160

2/3/2017

130

512

3,868

4,510

—

2/1/2017

2/3/2017

585

160

2/4/2017

128

745

3,047

3,920

—

2/2/2017

2/4/2017

383

195

2/5/2017

130

578

2,882

3,590

—

2/3/2017

2/5/2017

342

195

2/6/2017

141

537

2,772

3,450

—

2/4/2017

2/6/2017

535

213

2/7/2017

146

748

2,766

3,660

—

2/5/2017

2/7/2017

235

195

2/8/2017

146

430

2,804

3,380

—

2/6/2017

2/8/2017

142

284

2/9/2017

146

426

3,578

4,150

—

2/7/2017

2/9/2017

426

2/10/2017

146

524

3,740

4,410

—

2/8/2017

2/10/2017

547

142

2/11/2017

148

689

3,453

4,290

—

2/9/2017

2/11/2017

158

2/12/2017

148

211

3,551

3,910

—

2/10/2017

2/12/2017

2/13/2017

148

3,181

3,400

—

2/11/2017

2/13/2017

274

496

2/14/2017

148

770

3,062

3,980

—

2/12/2017

2/14/2017

574

248

2/15/2017

153

822

3,215

4,190

—

2/13/2017

2/15/2017

594

142

2/16/2017

163

736

3,151

4,050

—

38 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

2/14/2017

2/16/2017

543

124

2/15/2017

2/17/2017

521

2/16/2017

2/18/2017

608

2/17/2017

2/19/2017

2/18/2017

2/19/2017

2/20/2017

2/21/2017

2/22/2017

2/23/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City reservoirs

Date

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

2/17/2017

173

667

2,720

3,560

—

2/18/2017

194

539

2,677

3,410

—

2/19/2017

198

626

2,796

3,620

—

724

2/20/2017

198

759

4,003

4,960

—

2/20/2017

835

2/21/2017

197

888

4,885

5,970

—

2/21/2017

1,055

2/22/2017

193

1,108

4,359

5,660

—

2/22/2017

929

2/23/2017

195

929

5,006

6,130

—

2/23/2017

763

124

2/24/2017

196

887

7,897

8,980

—

2/24/2017

751

213

2/25/2017

196

964

11,740

12,900

—

2/25/2017

1,186

301

2/26/2017

196

1,487

28,517

30,200

—

2/24/2017

2/26/2017

1,599

532

2/27/2017

196

2,131

20,173

22,500

—

2/25/2017

2/27/2017

1,246

567

2/28/2017

198

1,813

11,989

14,000

—

2/26/2017

2/28/2017

742

567

3/1/2017

196

1,309

9,495

11,000

—

2/27/2017

133

3/1/2017

787

567

3/2/2017

269

1,354

8,197

9,820

—

2/28/2017

139

226

3/2/2017

722

567

3/3/2017

439

1,289

6,782

8,510

—

3/1/2017

150

226

3/3/2017

660

567

3/4/2017

450

1,227

5,643

7,320

—

3/2/2017

150

226

3/4/2017

505

567

3/5/2017

450

1,072

4,518

6,040

—

3/3/2017

150

227

3/5/2017

602

496

3/6/2017

451

1,098

4,111

5,660

—

3/4/2017

150

227

3/6/2017

739

390

3/7/2017

451

1,129

3,960

5,540

—

3/5/2017

150

226

3/7/2017

502

372

3/8/2017

450

874

4,626

5,950

—

3/6/2017

150

226

3/8/2017

489

372

3/9/2017

450

861

5,099

6,410

—

3/7/2017

150

226

3/9/2017

519

372

3/10/2017

450

891

4,699

6,040

—

3/8/2017

150

224

3/10/2017

815

479

3/11/2017

448

1,294

4,398

6,140

—

3/9/2017

150

224

3/11/2017

1,224

479

3/12/2017

448

1,703

3,439

5,590

—

3/10/2017

150

224

3/12/2017

975

603

3/13/2017

445

1,578

3,057

5,080

—

3/11/2017

144

215

3/13/2017

1,215

851

3/14/2017

433

2,066

2,771

5,270

—

Tables 1, 3–11, and 13–20 39

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

3/12/2017

152

224

3/14/2017

1,121

851

3/13/2017

150

224

3/15/2017

1,531

3/14/2017

150

224

3/16/2017

1,535

3/15/2017

150

224

3/17/2017

3/16/2017

150

224

3/17/2017

150

224

3/18/2017

150

3/19/2017

150

3/20/2017

3/21/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City Date

reservoirs

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

3/15/2017

450

1,972

3,068

5,490

—

851

3/16/2017

448

2,382

3,090

5,920

—

851

3/17/2017

448

2,386

4,016

6,850

—

1,534

496

3/18/2017

448

2,030

3,832

6,310

—

3/18/2017

1,535

3/19/2017

448

1,606

3,226

5,280

—

3/19/2017

367

106

3/20/2017

448

473

3,259

4,180

—

223

3/20/2017

160

3/21/2017

447

189

3,644

4,280

—

224

3/21/2017

230

3/22/2017

448

230

4,222

4,900

—

150

492

3/22/2017

355

3/23/2017

716

355

4,689

5,760

—

150

1,264

3/23/2017

142

3/24/2017

1,488

142

3,970

5,600

—

3/22/2017

150

1,494

3/24/2017

3/25/2017

1,718

4,172

5,890

—

3/23/2017

150

1,493

3/25/2017

3/26/2017

1,717

5,480

7,200

—

3/24/2017

150

1,502

3/26/2017

3/27/2017

1,726

7,129

8,890

—

3/25/2017

150

1,508

3/27/2017

360

3/28/2017

1,732

360

12,808

14,900

—

3/26/2017

150

1,494

3/28/2017

1,532

106

3/29/2017

1,718

1,638

19,244

22,600

—

3/27/2017

150

1,494

3/29/2017

1,439

408

3/30/2017

1,718

1,847

22,435

26,000

—

3/28/2017

373

1,501

3/30/2017

640

851

3/31/2017

1,948

1,491

19,761

23,200

—

3/29/2017

690

1,511

3/31/2017

1,139

851

4/1/2017

2,275

1,990

27,235

31,500

—

3/30/2017

696

1,513

4/1/2017

1,635

851

4/2/2017

2,283

2,486

20,731

25,500

—

3/31/2017

696

1,507

4/2/2017

1,643

851

4/3/2017

2,277

2,494

16,029

20,800

—

4/1/2017

696

1,513

161

4/3/2017

1,564

851

4/4/2017

2,370

2,415

16,215

21,000

—

4/2/2017

695

1,511

190

4/4/2017

1,530

851

4/5/2017

2,396

2,381

21,023

25,800

—

4/3/2017

696

1,515

192

4/5/2017

1,093

851

4/6/2017

2,403

1,944

18,353

22,700

—

4/4/2017

696

1,507

192

4/6/2017

1,630

851

4/7/2017

2,395

2,481

35,324

40,200

—

4/5/2017

696

1,496

192

4/7/2017

470

851

4/8/2017

2,384

1,321

30,295

34,000

—

4/6/2017

696

518

192

4/8/2017

659

851

4/9/2017

1,406

1,510

22,884

25,800

—

40 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

4/7/2017

138

192

4/9/2017

479

851

4/8/2017

196

4/10/2017

650

4/9/2017

286

189

4/11/2017

837

4/10/2017

364

1,394

192

4/12/2017

4/11/2017

696

1,491

192

4/12/2017

699

1,488

4/13/2017

699

4/14/2017

699

4/15/2017

4/16/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City Date

reservoirs

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

4/10/2017

370

1,330

19,200

20,900

—

851

4/11/2017

272

1,501

16,027

17,800

—

851

4/12/2017

511

1,688

13,701

15,900

—

854

851

4/13/2017

1,950

1,705

10,445

14,100

—

4/13/2017

1,082

674

4/14/2017

2,379

1,756

7,365

11,500

—

190

4/14/2017

141

532

4/15/2017

2,377

673

6,140

9,190

—

1,493

189

4/15/2017

284

4/16/2017

2,381

284

5,375

8,040

—

1,497

189

4/16/2017

284

4/17/2017

2,385

284

5,001

7,670

—

620

1,494

170

4/17/2017

315

390

4/18/2017

2,284

705

3,871

6,860

—

532

704

110

4/18/2017

489

355

4/19/2017

1,346

844

4,660

6,850

—

4/17/2017

500

1,241

110

4/19/2017

502

372

4/20/2017

1,851

874

4,395

7,120

—

4/18/2017

500

1,239

110

4/20/2017

593

372

4/21/2017

1,849

965

7,286

10,100

—

4/19/2017

493

1,239

110

4/21/2017

496

4/22/2017

1,842

496

13,362

15,700

—

4/20/2017

399

1,375

110

4/22/2017

461

4/23/2017

1,884

461

10,155

12,500

—

4/21/2017

399

1,499

110

4/23/2017

443

4/24/2017

2,008

443

8,449

10,900

—

4/22/2017

399

1,499

110

4/24/2017

862

408

4/25/2017

2,008

1,270

7,122

10,400

—

4/23/2017

399

1,499

110

4/25/2017

1,015

426

4/26/2017

2,008

1,441

6,391

9,840

—

4/24/2017

399

1,497

110

4/26/2017

724

408

4/27/2017

2,006

1,132

6,112

9,250

—

4/25/2017

545

1,497

110

4/27/2017

728

301

4/28/2017

2,152

1,029

5,429

8,610

—

4/26/2017

699

1,496

110

4/28/2017

301

4/29/2017

2,305

301

4,584

7,190

—

4/27/2017

495

1,496

105

4/29/2017

301

4/30/2017

2,096

301

3,833

6,230

—

4/28/2017

331

1,454

4/30/2017

284

5/1/2017

1,859

284

3,497

5,640

—

4/29/2017

300

948

5/1/2017

355

408

5/2/2017

1,321

763

7,246

9,330

—

4/30/2017

195

299

5/2/2017

268

532

5/3/2017

564

800

17,236

18,600

—

5/1/2017

300

5/3/2017

265

567

5/4/2017

481

832

13,787

15,100

—

5/2/2017

473

101

5/4/2017

350

727

5/5/2017

610

1,077

11,113

12,800

—

Tables 1, 3–11, and 13–20 41

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

5/3/2017

473

101

5/5/2017

210

603

5/4/2017

150

473

5/6/2017

5/5/2017

150

473

101

5/7/2017

5/6/2017

150

475

101

5/8/2017

5/7/2017

150

473

101

5/8/2017

150

473

5/9/2017

150

5/10/2017

150

5/11/2017

5/12/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City reservoirs

Date

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

5/6/2017

625

813

12,762

14,200

—

443

5/7/2017

722

443

13,535

14,700

—

284

5/8/2017

724

284

12,492

13,500

—

269

142

5/9/2017

726

411

10,463

11,600

—

5/9/2017

281

5/10/2017

724

370

8,906

10,000

—

101

5/10/2017

288

5/11/2017

724

377

7,779

8,880

—

473

101

5/11/2017

637

124

5/12/2017

724

761

6,515

8,000

—

473

101

5/12/2017

427

195

5/13/2017

724

622

5,624

6,970

—

150

473

101

5/13/2017

5/14/2017

724

8,617

9,430

—

150

473

101

5/14/2017

284

5/15/2017

724

284

9,192

10,200

—

5/13/2017

150

473

101

5/15/2017

327

160

5/16/2017

724

487

7,639

8,850

—

5/14/2017

150

473

101

5/16/2017

228

195

5/17/2017

724

423

6,803

7,950

—

5/15/2017

150

473

101

5/17/2017

204

372

5/18/2017

724

576

5,990

7,290

—

5/16/2017

201

600

101

5/18/2017

383

337

5/19/2017

902

720

5,118

6,740

—

5/17/2017

251

600

5/19/2017

324

106

5/20/2017

936

430

4,054

5,420

—

5/18/2017

183

283

5/20/2017

177

5/21/2017

551

177

4,072

4,800

—

5/19/2017

110

257

5/21/2017

5/22/2017

457

3,748

4,240

—

5/20/2017

113

288

101

5/22/2017

312

5/23/2017

502

312

3,446

4,260

—

5/21/2017

130

303

101

5/23/2017

393

5/24/2017

534

428

3,098

4,060

—

5/22/2017

128

303

101

5/24/2017

459

5/25/2017

532

459

2,989

3,980

—

5/23/2017

130

303

101

5/25/2017

428

5/26/2017

534

428

3,598

4,560

—

5/24/2017

130

302

101

5/26/2017

328

5/27/2017

533

328

3,399

4,260

—

5/25/2017

130

302

101

5/27/2017

177

5/28/2017

533

177

3,070

3,780

—

5/26/2017

130

302

101

5/28/2017

5/29/2017

533

3,062

3,630

—

5/27/2017

130

302

101

5/29/2017

5/30/2017

533

4,017

4,550

—

5/28/2017

130

302

101

5/30/2017

391

5/31/2017

533

391

3,956

4,880

—

42 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

457

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

5/29/2017

130

302

101

5/31/2017

5/30/2017

130

302

104

6/1/2017

511

5/31/2017

135

317

110

6/2/2017

450

6/1/2017

152

325

110

6/3/2017

6/2/2017

150

325

110

6/3/2017

150

325

6/4/2017

150

6/5/2017

150

6/6/2017

6/7/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City reservoirs

Date

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

6/1/2017

533

475

4,342

5,350

—

106

6/2/2017

536

617

4,447

5,600

—

195

6/3/2017

562

645

3,173

4,380

—

6/4/2017

587

3,040

3,680

—

6/4/2017

6/5/2017

585

3,260

3,880

—

110

6/5/2017

523

301

6/6/2017

585

824

11,091

12,500

—

325

110

6/6/2017

704

851

6/7/2017

585

1,555

19,760

21,900

—

326

110

6/7/2017

321

567

6/8/2017

586

888

14,526

16,000

—

152

326

110

6/8/2017

238

390

6/9/2017

588

628

10,684

11,900

—

152

353

110

6/9/2017

266

6/10/2017

615

280

8,835

9,730

—

6/8/2017

243

979

110

6/10/2017

301

6/11/2017

1,332

301

6,557

8,190

—

6/9/2017

300

1,213

110

6/11/2017

355

6/12/2017

1,623

355

5,502

7,480

—

6/10/2017

497

1,502

110

6/12/2017

838

372

6/13/2017

2,109

1,210

3,621

6,940

—

6/11/2017

500

1,501

110

6/13/2017

853

213

6/14/2017

2,111

1,066

2,713

5,890

—

6/12/2017

464

1,303

105

6/14/2017

556

6/15/2017

1,872

627

1,981

4,480

†20

6/13/2017

203

495

6/15/2017

267

6/16/2017

788

338

2,164

3,290

6/14/2017

125

274

6/16/2017

6/17/2017

489

2,382

2,960

6/15/2017

125

336

101

6/17/2017

195

6/18/2017

562

265

2,303

3,130

6/16/2017

139

433

101

6/18/2017

266

213

6/19/2017

673

479

2,588

3,740

†59

6/17/2017

139

441

101

6/19/2017

513

319

6/20/2017

681

832

4,627

6,140

†73

6/18/2017

139

402

101

6/20/2017

381

284

6/21/2017

642

665

4,723

6,030

6/19/2017

141

402

101

6/21/2017

212

6/22/2017

644

247

3,389

4,280

6/20/2017

139

402

101

6/22/2017

438

6/23/2017

642

491

2,717

3,850

6/21/2017

139

402

101

6/23/2017

449

6/24/2017

642

502

2,506

3,650

6/22/2017

138

394

101

6/24/2017

367

195

6/25/2017

633

562

2,525

3,720

6/23/2017

138

398

101

6/25/2017

457

6/26/2017

637

457

2,096

3,190

Tables 1, 3–11, and 13–20 43

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

201

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

6/24/2017

139

401

101

6/26/2017

6/25/2017

139

401

101

6/27/2017

6/26/2017

139

402

101

6/28/2017

180

6/27/2017

139

489

101

6/29/2017

6/28/2017

139

647

101

6/29/2017

139

699

101

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City Date

reservoirs

Computed Powerplants

uncontrolled

Col. 10

Total

Bank releases

Daily

Cumulative

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 11

Col. 12

Col. 13

Col. 14

6/27/2017

641

201

1,948

2,790

6/28/2017

641

1,839

2,480

6/29/2017

642

180

1,828

2,650

189

6/30/2017

729

189

1,732

2,650

†122

6/30/2017

486

7/1/2017

887

486

1,777

3,150

†320

7/1/2017

301

7/2/2017

939

319

1,762

3,020

†374

6/30/2017

139

699

101

7/2/2017

453

7/3/2017

939

506

2,155

3,600

†374

7/1/2017

139

613

101

7/3/2017

618

7/4/2017

853

707

1,620

3,180

†278

7/2/2017

139

503

101

7/4/2017

629

7/5/2017

743

647

1,510

2,900

†175

7/3/2017

139

596

101

7/5/2017

559

7/6/2017

836

612

1,362

2,810

†271

7/4/2017

139

651

101

7/6/2017

424

7/7/2017

891

459

1,420

2,770

†325

7/5/2017

139

603

101

7/7/2017

650

124

7/8/2017

843

774

1,443

3,060

†275

7/6/2017

139

603

101

7/8/2017

497

7/9/2017

843

497

1,400

2,740

†275

7/7/2017

139

603

101

7/9/2017

509

7/10/2017

843

544

1,343

2,730

†275

7/8/2017

139

654

101

7/10/2017

386

142

7/11/2017

894

528

1,348

2,770

†325

7/9/2017

139

625

101

7/11/2017

521

213

7/12/2017

865

734

1,111

2,710

†291

7/10/2017

139

395

101

7/12/2017

312

177

7/13/2017

635

489

1,216

2,340

108

140

7/11/2017

139

394

101

7/13/2017

310

124

7/14/2017

634

434

1,272

2,340

108

248

7/12/2017

139

394

101

7/14/2017

388

7/15/2017

634

441

2,235

3,310

248

7/13/2017

139

401

101

7/15/2017

290

7/16/2017

641

290

3,209

4,140

248

7/14/2017

139

401

101

7/16/2017

391

106

7/17/2017

641

497

2,032

3,170

248

7/15/2017

139

401

101

7/17/2017

292

142

7/18/2017

641

434

1,725

2,800

248

7/16/2017

139

401

101

7/18/2017

356

284

7/19/2017

641

640

1,679

2,960

248

7/17/2017

141

473

101

7/19/2017

601

355

7/20/2017

715

956

1,579

3,250

†237

248

7/18/2017

139

600

101

7/20/2017

630

355

7/21/2017

840

985

1,505

3,330

†275

248

2,990

†275

248

7/19/2017

139

600

101

7/21/2017

692

124

7/22/2017

840

816

1,334

44 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Date

7/20/2017

Excess release credits

Controlled releases Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

139

600

101

Amount

Date

7/22/2017

Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

602

177

IERQ

New York City Date

7/23/2017

reservoirs

Computed Powerplants

uncontrolled

Col. 10

Directed

Other

Col. 7

Col. 8

Col. 9

840

779

1,221

Total

Bank releases

Daily

Cumulative

Col. 11

Col. 12

Col. 13

Col. 14

2,840

†275

248

139

537

101

7/23/2017

568

7/24/2017

777

568

1,695

3,040

248

7/22/2017

141

404

101

7/24/2017

7/25/2017

646

7,019

7,740

248

7/23/2017

139

378

101

7/25/2017

7/26/2017

618

7,092

7,710

248

7/24/2017

139

362

105

7/26/2017

672

7/27/2017

606

672

4,982

6,260

248

7/25/2017

139

503

127

7/27/2017

718

7/28/2017

769

718

3,613

5,100

248

7/26/2017

142

503

139

7/28/2017

708

7/29/2017

784

708

2,858

4,350

248

7/27/2017

150

503

139

7/29/2017

278

7/30/2017

792

278

2,460

3,530

248

7/28/2017

150

503

139

7/30/2017

376

7/31/2017

792

429

2,069

3,290

248

7/29/2017

150

503

139

7/31/2017

655

213

8/1/2017

792

868

1,720

3,380

248

7/30/2017

150

503

139

8/1/2017

656

248

8/2/2017

792

904

1,484

3,180

248

7/31/2017

150

501

139

8/2/2017

541

177

8/3/2017

790

718

1,662

3,170

248

8/1/2017

149

501

139

8/3/2017

425

177

8/4/2017

789

602

1,909

3,300

248

8/2/2017

150

500

139

8/4/2017

592

160

8/5/2017

789

752

1,979

3,520

248

8/3/2017

150

498

139

8/5/2017

339

8/6/2017

787

339

2,054

3,180

248

8/4/2017

150

498

139

8/6/2017

168

8/7/2017

787

168

1,745

2,700

248

8/5/2017

150

498

139

8/7/2017

8/8/2017

787

1,605

2,410

108

356

8/6/2017

150

497

139

8/8/2017

8/9/2017

786

1,688

2,500

108

464

8/7/2017

150

506

139

8/9/2017

296

8/10/2017

795

296

1,529

2,620

497

8/8/2017

150

503

139

8/10/2017

474

8/11/2017

792

474

1,254

2,520

108

605

8/9/2017

150

498

139

8/11/2017

455

8/12/2017

787

455

2,138

3,380

605

8/10/2017

279

150

498

139

8/12/2017

172

8/13/2017

279

508

172

2,741

3,700

279

884

8/11/2017

274

150

497

139

8/13/2017

170

8/14/2017

274

512

170

2,264

3,220

274

1,158

8/12/2017

214

150

497

141

8/14/2017

254

8/15/2017

214

574

254

1,808

2,850

214

1,372

8/13/2017

150

500

150

8/15/2017

249

8/16/2017

800

249

1,591

2,640

1,390

8/14/2017

150

493

150

8/16/2017

443

8/17/2017

793

443

1,624

2,860

1,390

Tables 1, 3–11, and 13–20 45

7/21/2017

†53

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6 0

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

8/15/2017

150

497

150

8/17/2017

474

8/16/2017

150

500

150

8/18/2017

463

8/17/2017

150

500

150

8/19/2017

552

8/18/2017

210

150

501

150

8/20/2017

549

8/19/2017

150

501

150

8/21/2017

8/20/2017

149

501

150

8/21/2017

149

500

8/22/2017

149

500

8/23/2017

149

8/24/2017

8/25/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City Date

reservoirs

Computed Powerplants

uncontrolled

Col. 10

Total

Bank releases

Daily

Cumulative

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 11

Col. 12

Col. 13

Col. 14

8/18/2017

797

474

1,579

2,850

1,390

8/19/2017

800

498

2,082

3,380

1,390

177

8/20/2017

800

729

2,471

4,000

1,390

124

8/21/2017

210

591

673

2,356

3,830

210

1,600

599

142

8/22/2017

801

741

1,978

3,520

1,600

8/22/2017

804

8/23/2017

800

857

2,173

3,830

1,600

150

8/23/2017

707

8/24/2017

799

707

2,434

3,940

1,600

150

8/24/2017

599

8/25/2017

799

599

1,992

3,390

1,600

500

147

8/25/2017

444

8/26/2017

796

444

1,640

2,880

1,600

149

498

139

8/26/2017

187

8/27/2017

786

187

1,457

2,430

108

1,708

149

498

139

8/27/2017

174

8/28/2017

786

174

1,320

2,280

108

1,816

8/26/2017

149

495

139

8/28/2017

611

8/29/2017

783

611

1,206

2,600

1,857

8/27/2017

149

497

139

8/29/2017

463

8/30/2017

785

463

1,182

2,430

108

1,965

8/28/2017

150

497

139

8/30/2017

510

8/31/2017

786

510

1,154

2,450

108

2,073

8/29/2017

150

503

139

8/31/2017

680

9/1/2017

792

680

988

2,460

108

2,181

8/30/2017

595

149

492

128

9/1/2017

9/2/2017

595

174

960

1,800

2,231

8/31/2017

641

150

430

101

9/2/2017

9/3/2017

641

1,069

1,750

2,231

9/1/2017

563

149

401

101

9/3/2017

170

9/4/2017

563

170

1,199

2,020

182

2,413

9/2/2017

322

150

396

101

9/4/2017

329

9/5/2017

322

325

329

1,404

2,380

305

2,718

9/3/2017

150

401

101

9/5/2017

613

9/6/2017

652

613

1,415

2,680

2,718

9/4/2017

150

350

101

9/6/2017

443

9/7/2017

601

443

2,016

3,060

2,718

9/5/2017

150

323

101

9/7/2017

447

9/8/2017

574

447

2,319

3,340

2,718

9/6/2017

341

150

323

101

9/8/2017

548

9/9/2017

341

233

548

2,058

3,180

341

3,059

9/7/2017

150

323

101

9/9/2017

363

9/10/2017

574

363

1,653

2,590

3,059

9/8/2017

150

322

101

9/10/2017

361

9/11/2017

573

396

1,471

2,440

3,059

9/9/2017

150

322

101

9/11/2017

627

9/12/2017

573

698

1,289

2,560

3,059

46 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

9/10/2017

228

150

322

101

9/12/2017

461

9/11/2017

150

303

101

9/13/2017

523

9/12/2017

149

302

101

9/14/2017

553

9/13/2017

167

150

305

101

9/15/2017

9/14/2017

535

150

303

9/15/2017

818

142

596

9/16/2017

365

110

9/17/2017

400

110

9/18/2017

571

9/19/2017

Amount

Date

IERQ

New York City

Pepacton

Date

Excess release credits

Controlled releases Date

Computed

reservoirs

Powerplants

uncontrolled

Col. 10

Total

Bank releases

Daily

Cumulative

Other

Col. 7

Col. 8

Col. 9

Col. 11

Col. 12

Col. 13

Col. 14

9/13/2017

228

345

550

1,197

2,320

225

3,284

9/14/2017

554

594

1,142

2,290

108

3,392

9/15/2017

552

553

1,155

2,260

108

3,500

566

9/16/2017

167

389

566

1,308

2,430

167

3,667

9/16/2017

139

177

9/17/2017

549

316

1,225

2,090

340

4,007

9/17/2017

356

9/18/2017

823

427

1,100

2,350

600

4,607

300

9/18/2017

439

9/19/2017

365

130

474

1,061

2,030

150

4,757

231

9/19/2017

296

9/20/2017

426

296

1,018

1,740

–10

4,747

110

373

9/20/2017

256

9/21/2017

568

256

876

1,700

–50

4,697

548

110

353

9/21/2017

151

9/22/2017

548

151

921

1,620

–130

4,567

9/20/2017

788

110

586

9/22/2017

155

9/23/2017

781

155

824

1,760

4,577

9/21/2017

1,000

110

798

9/23/2017

282

9/24/2017

993

282

845

2,120

370

4,947

9/22/2017

1,148

110

948

9/24/2017

557

9/25/2017

1,143

557

670

2,370

620

5,567

9/23/2017

978

110

978

9/25/2017

421

9/26/2017

1,173

421

716

2,310

560

6,127

9/24/2017

1,169

110

1,112

9/26/2017

369

9/27/2017

1,307

369

634

2,310

560

6,687

9/25/2017

1,169

108

998

9/27/2017

364

9/28/2017

1,191

364

645

2,200

450

7,137

9/26/2017

1,392

108

1,199

9/28/2017

9/29/2017

1,392

538

1,930

180

7,317

9/27/2017

1,292

108

1,081

9/29/2017

9/30/2017

1,274

586

1,860

110

7,427

9/28/2017

1,396

110

1,191

9/30/2017

10/1/2017

1,386

544

1,930

180

7,607

9/29/2017

1,392

110

1,197

10/1/2017

10/2/2017

1,387

573

1,960

210

7,817

9/30/2017

1,458

105

1,278

10/2/2017

10/3/2017

1,453

607

2,060

310

8,127

10/1/2017

1,458

1,298

10/3/2017

124

10/4/2017

1,452

124

644

2,220

470

8,597

10/2/2017

1,458

1,298

10/4/2017

10/5/2017

1,453

579

2,050

300

8,897

10/3/2017

1,308

1,151

10/5/2017

10/6/2017

1,306

594

1,900

150

9,047

10/4/2017

1,263

1,105

10/6/2017

10/7/2017

1,260

589

1,920

170

9,217

10/5/2017

1,277

1,117

10/7/2017

10/8/2017

1,272

648

1,920

170

9,387

Tables 1, 3–11, and 13–20 47

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

1,268

1,106

10/8/2017

10/9/2017

10/7/2017

316

10/9/2017

106

10/8/2017

608

495

10/10/2017

10/9/2017

1,008

869

10/11/2017

10/10/2017

1,008

102

852

10/12/2017

10/11/2017

650

101

492

10/13/2017

10/12/2017

431

101

288

10/13/2017

908

811

10/14/2017

1,008

896

10/15/2017

1,108

10/16/2017

1,108

10/17/2017 10/18/2017

Amount

Date

IERQ

New York City

Pepacton

Date

Excess release credits

Controlled releases Date

Computed

reservoirs

Powerplants

uncontrolled

Col. 10

Total

Bank releases

Daily

Cumulative

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 11

Col. 12

Col. 13

Col. 14

1,261

908

2,240

490

9,877

10/10/2017

411

106

1,383

1,900

108

9,985

10/11/2017

605

1,434

2,110

360

10,345

10/12/2017

1,005

1,195

2,200

450

10,795

10/13/2017

1,010

960

1,970

220

11,015

10/14/2017

638

972

1,610

–140

10,875

10/14/2017

177

10/15/2017

434

177

919

1,530

–220

10,655

10/15/2017

10/16/2017

924

786

1,710

–40

10,615

10/16/2017

10/17/2017

1,009

851

1,860

110

10,725

990

10/17/2017

10/18/2017

1,103

807

1,910

160

10,885

987

10/18/2017

10/19/2017

1,102

788

1,890

140

11,025

1,158

1,040

10/19/2017

10/20/2017

1,155

725

1,880

130

11,155

1,158

1,043

10/20/2017

10/21/2017

1,156

694

1,850

100

11,255

10/19/2017

1,158

1,044

10/21/2017

10/22/2017

1,157

693

1,850

100

11,355

10/20/2017

1,158

1,026

10/22/2017

10/23/2017

1,156

664

1,820

11,425

10/21/2017

1,160

905

10/23/2017

10/24/2017

1,045

825

1,870

—

10/6/2017

10/22/2017

435

10/24/2017

10/25/2017

575

1,424

2,010

††285

—

10/23/2017

770

481

152

10/25/2017

10/26/2017

713

1,517

2,230

—

10/24/2017

800

656

10/26/2017

10/27/2017

796

1,544

2,340

—

10/25/2017

979

832

10/27/2017

10/28/2017

972

1,137

2,180

—

10/26/2017

429

10/28/2017

10/29/2017

569

1,361

1,930

††279

—

10/27/2017

220

10/29/2017

10/30/2017

360

10,151

10,600

††70

—

10/28/2017

152

10/30/2017

851

10/31/2017

292

851

17,457

18,600

—

10/29/2017

152

10/31/2017

851

11/1/2017

286

851

8,163

9,300

—

10/30/2017

152

11/1/2017

851

11/2/2017

279

878

5,433

6,590

—

10/31/2017

150

11/2/2017

851

11/3/2017

290

851

4,329

5,470

—

48 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

11/1/2017

152

11/3/2017

603

11/2/2017

152

11/4/2017

11/3/2017

152

11/5/2017

11/4/2017

158

11/5/2017

152

11/6/2017

11/7/2017

11/8/2017

Date

Excess release credits

Controlled releases Amount

Date

IERQ

New York City reservoirs

Date

Computed Powerplants

uncontrolled

Total

Bank releases

Daily

Cumulative

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

11/4/2017

292

603

3,595

4,490

—

603

11/5/2017

292

603

3,045

3,940

—

160

11/6/2017

295

160

2,715

3,170

—

11/6/2017

11/7/2017

302

2,598

2,900

—

11/7/2017

11/8/2017

292

2,738

3,030

—

153

11/8/2017

11/9/2017

293

2,587

2,880

—

152

11/9/2017

11/10/2017

292

2,398

2,690

—

150

11/10/2017

11/11/2017

290

2,310

2,600

—

11/9/2017

150

11/11/2017

11/12/2017

290

2,160

2,450

—

11/10/2017

152

11/12/2017

11/13/2017

292

1,998

2,290

—

11/11/2017

152

11/13/2017

11/14/2017

292

1,895

2,240

—

11/12/2017

152

11/14/2017

11/15/2017

292

1,835

2,180

—

11/13/2017

152

11/15/2017

11/16/2017

292

1,790

2,100

—

11/14/2017

152

11/16/2017

11/17/2017

292

1,778

2,070

—

11/15/2017

152

11/17/2017

11/18/2017

292

1,808

2,100

—

11/16/2017

152

11/18/2017

11/19/2017

292

1,888

2,180

—

11/17/2017

152

11/19/2017

11/20/2017

292

2,768

3,060

—

11/18/2017

153

11/20/2017

11/21/2017

293

3,167

3,460

—

11/19/2017

150

11/21/2017

11/22/2017

290

2,630

2,920

—

11/20/2017

149

11/22/2017

11/23/2017

289

2,381

2,670

—

11/21/2017

152

11/23/2017

11/24/2017

292

2,218

2,510

—

11/22/2017

152

11/24/2017

11/25/2017

292

2,098

2,390

—

11/23/2017

152

11/25/2017

11/26/2017

292

2,018

2,310

—

11/24/2017

152

11/26/2017

11/27/2017

292

1,948

2,240

—

11/25/2017

152

11/27/2017

11/28/2017

292

1,809

2,190

—

11/26/2017

152

11/28/2017

11/29/2017

292

1,723

2,050

—

11/27/2017

153

11/29/2017

11/30/2017

293

1,659

1,970

—

Tables 1, 3–11, and 13–20 49

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Date

Excess release credits

Controlled releases Amount Col. 1

Pepacton

Cannonsville

Neversink

Col. 2

Col. 3

Col. 4

Date

Lake

Rio

Wallenpaupack

Reservoir

Col. 5

Col. 6

IERQ

New York City Date

reservoirs Directed

Other

Col. 7

Col. 8

Computed Powerplants

uncontrolled

Col. 9

Col. 10

Total

Bank releases

Daily

Cumulative

Col. 11

Col. 12

Col. 13

Col. 14

Monthly totals Dec. 2016

1,398

1,738

899

Dec. 2016

248

Dec. 2016

4,035

248

118,157

122,440

—

Jan. 2017

1,404

1,741

899

Jan. 2017

423

4,734

Jan. 2017

4,044

5,157

179,169

188,370

—

Feb. 2017

1,488

2,044

1,081

Feb. 2017

14,504

6,046

Feb. 2017

4,613

21,796

159,571

185,980

—

Mar. 2017

4,681

16,954

2,261

Mar. 2017

22,122

12,762

Mar. 2017

23,896

34,884

198,840

257,620

—

Apr. 2017

16,003

38,095

4,355

Apr. 2017

20,634

17,871

Apr. 2017

58,453

38,505

376,992

473,950

—

May 2017

4,691

14,072

2,998

May 2017

7,127

6,489

May 2017

21,761

13,616

216,823

252,200

—

June 2017

5,576

15,796

3,123

June 2017

9,455

5,601

June 2017

24,495

15,056

142,899

182,450

274

—

July 2017

4,338

16,249

3,275

July 2017

14,292

2,730

July 2017

23,862

17,022

69,046

109,930

4,673

—

Aug. 2017

977

4,641

15,476

4,429

Aug. 2017

13,069

1,506

Aug. 2017

977

23,569

14,575

55,819

94,940

—

Sept. 2017

15,030

4,003

15,674

2,882

Sept. 2017

10,469

620

Sept. 2017

15,390

7,169

11,089

34,302

67,950

—

Oct. 2017

28,456

2,545

26,000

1,872

Oct. 2017

1,660

Oct. 2017

28,210

2,207

1,660

53,973

86,050

634

—

Nov. 2017

2,385

4,558

1,803

Nov. 2017

4,185

Nov. 2017

8,746

4,212

79,482

92,440

—

†Thermal release. ††Rapid Flow Change Mitigation Bank.

50 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Tables 1, 3–11, and 13–20 51 Table 11. Daily mean discharge of the Delaware River at Montague, New Jersey (U.S. Geological Survey site number 01438500), for report year ending November 30, 2017. [Data from U.S. Geological Survey, 2019d. All values except the year’s total discharge volume are in cubic feet per second (ft3/s). The total volume discharged is given in cubic feet per second accumulated daily ([ft3/s]-d). —, not applicable] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

6,060

3,150

4,720

11,000

31,500

5,640

5,350

3,130

3,360

2,480

2,020

9,390

9,000

2,910

4,480

9,820

25,200

9,330

5,590

2,980

3,200

1,820

2,060

6,690

6,200

2,790

4,510

8,510

20,600

18,600

4,380

3,540

3,190

1,760

2,080

5,470

4,690

4,040

3,920

7,320

21,300

15,100

3,680

3,110

3,320

2,040

2,240

4,490

3,840

7,020

3,590

6,040

25,800

12,800

3,880

2,810

3,540

2,400

2,080

3,940

3,380

5,870

3,450

5,660

22,900

14,200

12,500

2,700

3,200

2,700

1,930

3,170

3,210

4,550

3,660

5,540

40,900

14,700

21,900

2,650

2,720

3,070

1,960

2,900

3,220

3,980

3,380

5,950

33,500

13,500

16,000

2,910

2,430

3,350

1,970

3,030

3,160

3,190

3,960

6,410

25,600

11,600

11,900

2,580

2,520

3,190

2,290

2,880

2,770

3,300

4,250

6,040

20,700

10,000

9,730

2,560

2,640

2,610

1,950

2,690

2,410

3,360

4,200

6,140

17,700

8,880

8,190

2,570

2,540

2,460

2,170

2,600

2,260

4,030

3,910

5,570

15,800

8,000

7,480

2,500

3,400

2,580

2,270

2,450

2,190

7,340

3,400

5,070

14,000

6,970

6,940

2,130

3,710

2,340

2,040

2,290

2,280

10,900

3,980

5,280

11,400

9,430

5,890

2,270

3,210

2,310

1,680

2,240

1,970

7,540

4,190

5,350

9,120

10,200

4,480

3,030

2,830

2,280

1,600

2,180

1,700

5,800

4,050

5,790

8,010

8,850

3,290

3,830

2,620

2,450

1,790

2,100

1,760

5,170

3,560

6,870

7,700

7,950

2,960

3,150

2,880

2,110

1,860

2,070

1,800

5,500

3,410

6,270

6,820

7,290

3,130

2,780

2,860

2,370

1,910

2,100

7,870

6,250

3,620

5,200

6,840

6,740

3,740

2,940

3,400

2,050

1,890

2,180

7,850

6,090

4,960

4,200

7,170

5,420

6,140

3,230

4,010

1,770

1,880

3,060

5,450

5,480

5,970

4,290

10,400

4,800

6,030

3,300

3,840

1,730

1,850

3,460

4,640

5,320

5,660

4,940

15,600

4,240

4,280

2,970

3,530

1,660

1,850

2,920

4,390

5,650

6,130

5,780

12,400

4,260

3,850

2,820

3,850

1,810

1,820

2,670

3,720

9,340

8,980

5,590

10,900

4,060

3,650

3,020

3,950

2,180

1,870

2,510

3,440

12,500

12,900

5,920

10,300

3,980

3,720

7,730

3,410

2,440

2,010

2,390

3,480

9,670

30,200

7,270

9,810

4,560

3,190

7,690

2,900

2,390

2,230

2,310

3,390

9,250

22,500

9,030

9,220

4,260

2,790

6,240

2,440

2,390

2,340

2,240

3,850

8,050

14,000

15,200

8,580

3,780

2,480

5,080

2,300

2,280

2,180

2,190

4,210

6,780

—

22,900

7,100

3,630

2,650

4,330

2,620

2,010

1,930

2,050

3,750

6,150

—

25,800

6,200

4,550

2,650

3,510

2,450

1,940

10,600

1,970

3,430

5,630

—

23,400

—

4,880

—

3,270

2,470

—

18,600

—

Total1

121,370

186,600

185,540

258,150

473,070

252,200

182,440

107,360

95,340

68,970

86,950

92,630

Mean2

3,915

6,019

6,626

8,327

15,769

8,135

6,081

3,463

3,075

2,299

2,805

3,088

1The year’s total is 2,110,620 cubic feet per second accumulated daily. 2The combined mean is 5,800 cubic feet per second.

52 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 13. Daily mean discharge of the East Branch Delaware River at Downsville, New York (U.S. Geological Survey site number 01417000), for report year ending November 30, 2017. [Data from U.S. Geological Survey, 2019a. All values except for the year’s total discharge volume are in cubic feet per second (ft3/s). The total discharge volume is given in cubic feet per second accumulated daily ([ft3/s]-d). —, not applicable] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

147

703

103

261

132

143

154

147

703

2,700

179

132

143

154

147

703

3,120

147

132

143

154

147

703

2,190

143

132

144

154

147

703

1,830

175

132

144

154

147

703

1,860

1,330

132

146

154

147

1,840

1,430

1,700

132

147

154

147

3,070

1,080

1,310

134

147

154

147

2,740

820

1,030

136

147

154

147

2,190

617

817

134

147

154

100

147

1,870

468

623

133

147

154

110

147

1,420

373

523

134

147

154

110

146

1,090

485

324

135

147

154

146

852

732

128

136

147

154

144

682

657

122

136

147

154

144

519

582

129

136

147

128

145

480

543

136

147

117

145

469

422

134

136

149

117

145

469

275

137

136

151

117

145

410

254

158

136

151

117

145

372

210

135

136

151

117

145

371

157

132

136

152

117

147

374

131

132

136

151

117

147

407

128

132

138

151

116

147

469

166

132

136

151

116

147

663

130

132

136

151

116

147

602

141

132

141

151

116

270

359

133

132

143

153

116

—

703

285

129

132

143

154

116

—

703

262

195

133

143

154

116

—

703

—

313

—

143

154

—

Total1

1,496

1,484

1,673

6,328

2,483

22,374

10,830

4,213

4,604

4,069

2,752

2,615

Mean2

204

883

722

361

136

149

136

1The year’s total is 88,921 cubic feet per second accumulated daily. 2The combined mean is 243 cubic feet per second.

Tables 1, 3–11, and 13–20 53 Table 14. Daily mean discharge, West Branch Delaware River at Stilesvillle, New York (U.S. Geological Survey site number 01425000), for report year ending November 30, 2017. [Data from U.S. Geological Survey, 2019b. All values except for the year’s total discharge are in cubic feet per second (ft3/s). The total discharge volume is given in cubic feet per second accumulated daily ([ft3/s]-d); —, not applicable] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

205

1,410

316

591

674

526

423

1,180

150

201

1,410

925

628

613

527

374

1,200

150

203

1,410

1,800

627

529

526

374

1,200

151

203

1,420

1,920

630

594

529

374

1,070

152

206

1,850

1,960

706

633

527

336

1,030

152

204

2,680

2,210

2,040

597

526

316

1,040

152

205

3,800

2,280

2,790

597

529

316

1,030

154

204

4,350

2,210

2,590

597

534

317

313

152

201

3,900

2,050

2,620

638

531

316

496

151

202

3,420

1,820

2,290

607

518

316

811

151

203

3,460

1,600

2,010

367

518

314

787

152

201

2,740

1,390

1,560

365

519

302

528

152

202

2,300

1,280

1,200

368

518

299

267

152

208

1,940

1,360

472

371

518

299

745

152

200

1,680

1,420

274

370

519

299

829

153

199

1,490

1,400

316

370

518

587

917

153

200

765

1,390

413

372

518

296

916

153

200

1,200

1,270

428

449

528

250

968

154

100

199

1,130

937

368

589

523

375

969

154

100

201

1,120

814

365

590

521

336

969

152

100

310

1,530

728

365

590

520

562

960

151

101

1,320

2,110

659

365

524

748

847

152

101

1,410

2,160

643

362

373

526

900

415

154

103

1,410

2,040

569

365

355

522

919

460

154

107

1,410

1,860

415

366

340

518

1,030

652

154

108

1,420

1,710

350

368

533

518

942

774

153

104

1,410

1,560

320

369

534

524

1,100

401

153

120

1,410

1,430

306

466

534

530

1,010

213

154

—

1,410

1,320

298

628

529

534

1,110

154

153

—

1,420

861

300

673

526

534

1,110

159

153

—

1,420

—

402

—

526

527

—

151

—

Total1

2,379

2,391

2,568

18,397

60,056

35,342

27,245

15,654

16,250

22,451

4,573

Mean2

593

2,002

1,140

908

505

524

542

724

152

1The year’s total is 223,556 cubic feet per second accumulated daily. 2The combined mean is 611 cubic feet per second.

54 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 15. Daily mean discharge, Neversink River at Town of Neversink, New York (U.S. Geological Survey site number 01436000), for report year ending November 30, 2017. [Data from U.S. Geological Survey, 2019c. All values except for the year’s total are in cubic feet per second (ft3/s). The total discharge volume is given in cubic feet per second accumulated daily, ([ft3/s]-d). —, not applicable] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

120

135

103

138

135

187

120

132

135

187

102

106

135

187

145

164

134

566

102

1,460

134

1,970

122

757

134

1,080

123

259

133

650

142

100

133

496

110

100

134

452

111

141

100

134

424

180

154

134

349

252

129

133

187

408

100

139

180

304

143

189

121

100

142

143

102

100

141

114

100

142

114

104

100

142

116

166

100

142

117

100

143

115

143

115

142

115

100

142

116

133

109

451

118

110

113

129

117

132

129

117

136

130

—

136

129

—

109

136

129

—

102

—

135

130

—

Total1

931

924

1,530

2,320

8,863

3,903

5,518

3,260

4,213

2,564

1,618

1,637

Mean2

295

126

184

105

136

1The year total is 37,281 cubic feet per second accumulated daily. 2The combined mean is 102 cubic feet per second.

Tables 1, 3–11, and 13–20 55 Table 16. Daily mean discharge, Delaware River at Trenton, New Jersey (U.S. Geological Survey site number 01463500), for report year ending November 30, 2017. [Data from U.S. Geological Survey, 2019f. All values except the year’s total are in cubic feet per second (ft3/s). The total discharge volume is given in cubic feet per second accumulated daily ([ft3/s]-d). —, not applicable] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sep. 2017

7,590

6,290

10,300

18,500

54,500

10,800

10,400

5,150

6,640

4,590

3,230

23,600

10,700

5,880

9,130

17,000

50,600

10,000

6,790

6,310

4,550

3,180

14,700

13,600

5,870

8,540

15,400

40,900

13,200

9,810

6,270

6,990

5,120

3,240

11,400

10,400

7,310

8,230

13,900

38,200

21,900

8,990

5,710

7,660

5,500

3,210

9,800

8,290

8,160

7,390

11,900

42,100

19,900

8,010

5,770

8,110

4,910

3,220

8,450

7,110

11,100

6,800

10,500

44,300

19,200

8,780

5,190

9,450

5,480

3,380

7,480

6,980

10,400

6,650

9,830

57,400

20,300

20,500

5,890

8,170

7,830

3,290

6,820

6,790

7,630

7,160

10,100

65,400

20,300

27,900

14,300

8,630

8,540

3,630

6,230

6,320

5,580

7,370

10,300

50,300

18,700

21,300

9,570

6,940

7,750

5,410

6,040

6,110

5,000

7,670

10,600

39,400

16,600

16,800

7,570

6,070

6,900

5,350

5,740

5,750

5,680

7,890

10,500

33,000

14,500

14,400

6,380

5,690

6,110

5,440

5,310

5,530

6,550

8,130

9,980

28,500

13,100

12,400

5,790

7,150

5,400

4,960

5,100

5,560

7,390

8,420

9,420

25,200

15,500

11,200

5,870

10,700

5,150

4,920

5,010

5,140

10,400

8,070

9,100

22,200

19,300

10,400

6,010

9,420

5,010

4,460

4,890

4,850

14,800

7,940

9,050

18,900

18,800

9,400

7,970

8,250

4,770

3,880

4,580

4,830

11,400

8,390

9,060

16,100

18,300

8,050

8,540

7,530

4,600

3,360

4,360

3,230

9,830

8,240

10,100

14,600

16,100

6,980

8,080

6,660

4,570

3,180

4,310

3,750

9,810

7,500

11,700

13,800

14,000

6,360

7,660

6,490

4,470

3,380

4,150

4,040

9,660

6,970

10,900

12,500

13,000

6,020

6,600

9,900

4,250

3,480

4,460

5,740

10,400

7,190

10,700

11,900

7,410

6,370

8,630

4,440

3,490

4,900

9,770

10,700

8,550

11,000

12,600

10,700

11,000

6,510

8,060

3,990

3,360

5,000

7,920

10,400

10,100

13,400

17,000

9,180

10,600

7,050

7,460

3,590

3,280

5,910

7,340

10,200

9,720

13,300

21,200

8,690

8,130

8,030

9,230

3,410

3,170

5,690

7,090

17,400

9,740

13,000

17,800

8,380

11,800

8,670

7,880

3,270

3,210

5,200

6,800

19,200

12,300

12,600

16,100

8,730

10,800

15,800

7,280

3,340

3,990

4,890

6,180

20,500

18,600

12,800

16,000

11,800

8,410

16,800

6,690

3,720

3,980

4,710

5,930

16,900

36,700

15,200

15,500

10,100

7,290

14,800

6,290

3,870

3,790

4,600

5,880

15,700

26,300

20,000

14,200

9,440

6,050

12,300

5,540

3,800

4,000

4,450

5,990

14,100

—

31,400

14,400

8,330

5,340

10,400

5,040

3,670

4,790

4,470

7,310

12,500

—

38,400

12,400

9,740

4,940

8,990

4,820

3,490

11,300

4,370

6,870

11,200

—

44,100

—

10,300

—

7,400

4,760

—

19,300

—

Total1

209,390

327,940

289,990

453,740

37,000

430,790

319,470

258,230

228,440

146,090

141,860

196,620

Mean2

6,755

10,579

10,357

14,637

27,900

13,896

10,649

8,330

7,369

4,870

4,576

6,554

1The year’s total is 3,839,560 cubic feet per second accumulated daily. 2The combined mean is 10,539 cubic feet per second.

Oct. 2017 Nov. 2017

[Data from U.S. Geological Survey, 2020h. Specific conductance measurements provided in microsiemens per centimeter at 25 degrees Celsius. —, not applicable; max, maximum; min, minimum]

Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

23,000

15,500

15,900

7,550

13,400

5,610

11,600

4,700

11,000

2,480

5,420

1,570

6,810

3,320

7,370

2,040

13,500

4,570

16,600

23,000

11,800

14,900

8,400

21,600

14,100

17,500

8,180

12,300

5,500

9,510

2,480

9,370

1,440

5,470

1,530

7,570

3,190

8,020

1,960

14,000

4,410

17,000

22,100

12,200

13,900

7,810

18,600

11,900

19,100

9,570

12,400

5,410

7,370

2,210

6,740

1,240

4,960

1,420

8,620

2,990

8,980

1,900

15,200

4,730

17,400

22,500

13,200

14,100

7,380

22,300

12,400

18,000

9,800

10,900

4,980

8,060

1,960

5,580

1,080

5,940

1,540

9,600

2,960

10,500

2,010

16,300

5,080

16,800

20,300

12,900

15,100

7,360

22,700

13,200

14,500

8,820

14,000

4,870

10,500

1,910

5,840

1,140

6,690

1,640

9,980

3,010

11,700

2,330

13,700

5,520

16,700

20,200

12,700

15,700

7,750

22,100

12,500

16,200

7,890

13,800

4,240

12,900

2,620

5,200

1,260

4,970

1,610

11,700

3,220

10,700

3,000

14,600

4,840

14,600

19,100

12,300

14,600

7,540

23,400

14,400

16,300

7,870

14,000

4,890

13,700

4,530

1,980

730

3,470

1,140

11,400

3,710

11,500

3,290

14,700

5,090

14,500

20,100

12,800

14,100

7,160

21,900

13,300

18,200

7,980

13,400

5,610

11,300

4,120

1,540

934

5,120

984

11,200

3,430

11,500

3,600

13,000

4,700

13,400

19,500

12,600

16,100

7,850

18,900

12,700

19,600

8,030

14,500

4,760

10,300

3,180

1,290

739

5,600

935

9,860

3,050

11,200

3,410

13,600

4,610

12,600

18,900

12,000

16,500

7,970

20,600

12,200

19,200

9,410

14,100

5,090

11,700

3,120

996

574

5,810

946

9,150

2,700

12,600

3,510

14,000

4,940

14,600

17,800

11,500

13,200

7,970

21,900

12,000

17,900

9,040

13,900

5,350

10,600

2,840

953

581

6,960

968

7,990

2,500

13,000

3,740

13,900

5,120

14,000

18,200

11,500

15,200

7,320

22,300

12,600

17,600

8,740

16,100

5,810

11,000

3,000

904

642

5,990

1,060

8,290

2,350

12,400

3,740

12,700

5,330

15,000

20,600

12,100

15,600

7,400

21,100

12,400

15,100

7,580

14,300

5,190

10,900

2,920

776

590

6,280

1,130

8,220

2,310

12,400

3,910

12,700

5,370

15,800

19,800

12,800

15,400

7,670

21,700

12,600

16,300

7,500

15,100

5,460

13,200

3,080

804

513

5,800

1,110

8,860

2,410

12,600

3,980

12,000

5,150

15,500

18,900

12,400

16,900

7,920

19,600

11,500

15,100

7,430

16,800

6,010

11,200

3,470

1,100

518

5,100

848

9,900

2,820

13,100

4,500

13,000

5,170

14,800

18,000

12,000

18,000

9,070

18,300

9,900

14,400

7,260

12,600

5,290

9,820

2,630

846

466

7,380

993

9,960

3,090

12,900

4,460

13,200

5,260

15,100

17,100

11,700

18,300

9,360

20,400

9,920

14,000

7,150

14,100

5,180

13,000

3,010

1,440

490

8,300

1,300

10,100

3,340

13,100

4,730

12,800

4,690

15,000

18,000

11,600

14,800

8,980

17,900

9,770

14,400

7,100

14,400

4,430

14,300

3,890

4,420

491

7,880

1,640

8,650

3,420

13,200

4,870

12,000

4,730

15,800

17,800

12,000

17,300

9,150

18,000

9,770

16,000

7,080

16,000

5,620

17,200

6,840

4,730

970

8,710

1,830

7,190

3,120

13,800

4,940

11,900

4,370

16,300

17,200

11,700

13,900

6,760

19,400

9,760

15,300

6,940

16,400

6,720

17,600

8,080

4,590

687

10,100

2,080

8,340

2,600

13,800

4,810

11,600

4,140

16,700

16,800

11,000

12,200

6,150

19,400

10,700

16,000

7,120

18,300

7,520

18,900

7,960

5,770

973

10,200

2,810

8,520

2,410

14,300

4,730

11,600

4,090

16,100

16,600

10,800

13,800

5,670

19,300

10,900

16,500

7,100

18,700

8,600

18,900

8,080

6,860

1,090

9,470

3,300

8,770

2,310

15,200

4,970

11,100

4,050

16,200

16,800

11,000

14,000

5,190

19,600

9,410

20,000

9,370

17,900

8,450

18,600

9,110

7,390

1,140

11,000

3,320

8,560

2,470

15,300

5,390

10,200

3,740

16,100

17,300

11,100

15,600

5,610

20,600

10,000

22,600

11,800

18,000

8,580

18,000

8,870

6,440

1,220

11,900

3,610

8,710

2,280

15,300

5,640

9,500

3,600

15,100

18,100

12,100

15,300

6,350

19,300

9,490

18,700

8,580

17,500

8,200

17,700

7,060

8,190

1,340

11,800

4,120

7,430

1,980

14,700

4,780

9,090

3,540

16,400

17,900

11,800

15,900

6,680

20,200

10,200

18,600

9,750

16,400

7,190

18,700

8,340

8,190

1,220

10,900

3,680

7,830

1,930

12,900

4,330

9,080

3,570

15,400

18,000

11,800

14,800

7,000

20,500

11,000

14,800

7,520

13,200

5,350

18,400

7,720

7,810

1,500

9,180

3,420

7,720

2,000

10,800

4,040

10,300

3,740

16,600

18,000

11,500

15,900

6,900

19,000

9,710

13,200

5,800

11,500

4,780

16,800

7,890

5,940

1,540

9,340

3,490

7,820

2,080

9,500

3,950

11,500

3,920

18,300

19,000

11,400

16,400

6,070

20,400

10,600

13,800

5,400

—

16,300

6,960

5,660

1,480

9,980

3,490

8,340

2,240

11,300

3,730

11,700

4,330

20,200

19,300

11,900

17,800

8,110

17,800

10,300

14,500

5,480

—

15,000

6,130

4,910

1,480

9,520

3,650

6,770

2,210

14,600

4,290

14,600

5,940

20,000

15,400

10,400

17,800

8,470

17,900

8,910

15,100

5,660

—

13,400

4,960

—

7,870

3,410

—

13,700

4,860

14,000

5,480

—

14,000

8,500

—

Mean

20,313

11,408

16,594

7,887

14,786

5,882

13,757

4,957

4,575

1,018

7,649

2,083

8,795

2,715

12,322

3,917

12,615

4,639

15,953

7,771

18,590

11,777

15,437

7,434

Maximum

23,400

15,500

22,600

11,800

18,700

8,600

18,900

9,110

11,000

2,480

11,900

4,120

11,700

3,710

15,300

5,640

16,300

5,940

20,200

10,700

23,000

13,200

18,300

9,360

Minimum

17,800

8,910

13,200

5,400

4,240

7,370

1,910

776

466

3,470

848

6,770

1,930

7,370

1,900

9,080

3,540

12,600

5,220

14,000

8,500

12,200

5,190

56 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Table 17. Daily maximum and minimum specific conductance, Delaware River at Reedy Island Jetty, Delaware (site number 01482800), for report year ending November 30, 2017.

Table 18. Daily maximum and minimum chloride concentrations, Delaware River at Chester, Pennsylvania (site number 01477050), for report year ending November 30, 2017. [Record provided by Kimberly-Clark Chester Operations. Concentrations are in milligrams per liter. *, missing data; —, not applicable; max, maximum; min, minimum] Day

Dec. 2016

Jan. 2017

Feb. 2017

Mar. 2017

Apr. 2017

May 2017

June 2017

July 2017

Aug. 2017

Sept. 2017

Oct. 2017

Nov. 2017

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

651

602

103

167

651

310

109

103

480

310

109

124

414

288

109

103

414

230

109

385

333

109

124

358

288

109

124

358

230

109

203

230

169

109

272

114

213

143

203

169

143

188

103

155

131

219

161

169

131

109

293

148

169

131

254

136

143

123

203

114

143

123

203

114

143

123

174

169

120

161

136

155

161

136

169

120

161

143

180

140

143

119

196

152

123

109

212

166

119

109

361

166

119

109

361

180

130

109

311

166

130

267

152

109

248

140

109

—

389

212

109

—

152

128

109

—

124

—

Mean

228

202

117

Maximum

651

109

199

389

212

103

Minimum

109

Tables 1, 3–11, and 13–20 57

Max

58 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Table 19. Daily mean dissolved-oxygen concentration, Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (site number 01467200), April 1 to November 30, 2017. [Station was renamed “Delaware River at Penn’s Landing, Philadelphia, PA,” in January 2020. Data from U.S. Geological Survey, 2020d. Concentrations are in milligrams per liter. —, not applicable]

Day

Apr.

May

June

July

Aug.

Sept.

Oct.

Nov.

11.8

8.9

6.4

6.8

6.0

5.9

6.0

8.0

11.9

8.8

6.6

6.4

6.0

8.1

11.8

8.8

6.7

6.3

6.0

5.8

6.0

8.0

11.8

8.8

6.8

6.2

6.4

5.9

6.0

8.0

11.7

8.5

6.7

6.0

6.6

6.1

7.9

11.4

8.2

6.6

5.8

6.7

5.9

6.0

7.9

10.9

8.4

6.7

5.4

6.5

5.7

5.9

8.1

11.0

8.6

7.0

5.4

6.2

5.8

5.9

8.3

11.2

8.6

7.3

5.6

6.2

6.0

5.8

8.2

11.2

8.6

7.7

5.7

6.2

5.6

8.5

11.3

8.7

8.0

5.7

6.1

6.2

5.6

8.8

11.2

8.8

8.1

5.6

5.9

6.1

5.9

8.8

11.0

8.9

8.2

5.6

5.8

5.9

6.0

8.7

10.7

9.1

8.3

5.4

5.9

5.8

6.1

8.7

10.4

9.4

8.4

5.0

5.7

5.8

6.1

8.7

10.1

9.3

8.4

5.0

5.6

5.8

6.2

8.6

9.9

9.1

8.2

5.1

5.5

5.7

6.3

9.0

9.8

8.8

7.9

5.2

5.4

5.6

6.3

9.0

9.8

8.6

7.8

5.4

5.1

5.7

6.4

9.2

9.7

8.4

7.5

5.5

5.2

5.7

6.5

9.6

8.3

7.5

5.6

5.2

5.7

6.5

9.7

9.3

8.0

7.5

5.7

5.2

5.6

6.4

9.7

9.1

7.6

7.3

5.4

5.3

5.6

6.5

9.8

9.0

7.3

7.1

5.3

5.2

5.6

6.6

9.8

9.0

7.1

7.0

5.3

5.2

5.4

6.6

9.8

8.9

6.8

6.9

5.3

5.4

6.6

9.9

8.9

6.8

5.4

6.8

10.1

9.0

6.7

6.8

5.4

5.6

5.4

6.9

10.1

8.9

6.6

6.8

5.4

5.7

5.6

6.8

10.0

9.0

6.4

7.0

5.6

5.8

7.2

10.0

—

6.3

—

5.8

5.7

—

7.8

—

Mean

10.3

8.2

7.3

5.6

5.8

6.3

9.0

Maximum

11.9

9.4

8.4

6.8

6.7

6.2

7.8

10.1

Minimum

8.9

6.3

6.4

5.0

5.1

5.4

5.6

7.9

Tables 1, 3–11, and 13–20 59 Table 20. Daily mean dissolved-oxygen concentration, Delaware at Chester, Pennsylvania (site number 01477050), April 1 to November 30, 2017. Day

Apr.

May

June

July

Aug.

Sept.

Oct.

Nov.

11.2

8.5

6.5

6.6

7.2

6.2

6.7

7.6

11.2

8.6

6.6

6.4

7.0

6.2

6.8

7.4

11.2

8.6

6.8

6.2

7.0

6.3

6.8

7.1

11.1

8.8

7.3

6.2

7.3

6.3

6.8

7.1

10.9

8.8

7.3

6.2

7.3

6.5

6.7

7.1

10.8

8.5

7.4

6.1

7.1

6.1

6.4

7.2

10.6

8.4

7.6

5.9

6.6

6.0

6.3

7.2

10.6

8.2

7.4

5.8

6.4

6.1

6.4

7.4

10.6

8.1

7.5

5.9

6.4

6.2

7.4

10.5

7.9

6.1

6.2

6.3

5.8

7.6

10.5

7.9

8.3

6.3

6.1

6.4

5.7

7.9

10.4

7.9

8.8

6.2

5.9

6.3

7.9

10.3

8.2

9.3

6.1

5.7

6.1

6.6

7.8

10.2

8.2

9.5

5.8

5.6

6.1

6.4

7.8

10.1

8.4

9.8

5.5

5.2

6.1

6.3

7.9

10.0

8.5

9.7

5.5

5.0

5.9

6.2

8.0

9.9

8.6

9.1

5.6

5.2

6.0

6.4

8.3

9.7

8.7

8.6

5.7

5.1

5.9

6.6

8.3

9.7

8.9

8.1

5.9

5.2

5.9

6.7

8.8

9.5

8.9

7.7

6.2

5.3

6.0

6.8

9.0

9.3

7.6

6.4

5.4

5.9

6.7

9.3

9.1

9.0

7.5

6.6

5.7

5.8

6.7

9.2

9.0

8.6

7.1

6.6

6.0

5.8

6.8

9.2

9.0

8.7

6.8

6.5

5.8

5.7

7.4

9.1

8.6

6.6

6.2

5.8

5.7

7.2

9.0

8.9

8.4

6.6

6.2

5.9

5.8

7.1

9.0

8.7

8.2

6.5

6.2

6.1

5.8

7.2

9.0

8.5

8.2

6.4

6.0

6.4

5.9

7.4

9.0

8.4

7.6

6.5

6.1

6.4

6.2

7.6

9.0

8.4

7.1

6.7

6.6

6.4

7.7

8.9

—

6.6

—

7.0

6.3

—

7.7

—

Mean

9.9

8.4

7.6

6.2

6.1

6.7

8.2

Maximum

11.2

9.3

9.8

7.0

7.3

6.5

7.7

9.3

Minimum

8.4

6.6

6.4

5.5

5.0

5.7

7.1

60 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

References Cited Delaware River Basin Commission [DRBC], 2016, DRBC approves drought management special permit—Basin placed in “Drought Watch” stage effective immediately: DRBC news release, November 23, 2016, accessed May 2, 2019, at https://www.nj.gov/drbc/home/newsroom/ news/approved/20161123_newsrel_drought-mgt-special- permit.html. Delaware River Basin Commission [DRBC], 2017, DRBC lifts basinwide drought watch—Commission urges water efficiency and compliance with Stateissued drought watches and warnings: DRBC news release, January 18, 2017, accessed May 2, 2019, at https://www.nj.gov/drbc/home/newsroom/news/approved/ 20170118_newsrel_end-drought-watch.html. Delaware River Basin Commission [DRBC], 2021, Delaware Estuary Water Quality Monitoring Program: DRBC website, accessed November 5, 2021, at https://www.nj.gov/drbc/ programs/quality/boat-run.html. Delaware River Basin Commission [DRBC], 2023, Docket no. D–77–20 CP (Revised)—Delaware River Basin Commission—Modification to the release schedules from Cannonsville, Pepacton, and Neversink Reservoirs, Delaware and Sullivan Counties, New York: DRBC, West Trenton, N.J., [proceedings], 5 p., accessed March 16, 2023, at https://www.nj.gov/drbc/library/documents/Reservoir_ NYC/D-77-20CPRev.pdf. DiFrenna, V.J., Andrews, W.J., Russell, K.L., Norris, J.M., and Mason, R.R., Jr., 2020, Report of the River Master of the Delaware River for the period December 1, 2010– November 30, 2011: U.S. Geological Survey Open-File Report 2020–1020, 127 p., accessed April 15, 2021, at https://doi.org/10.3133/ofr20201020. Kauffman, G., Belden, A., and Homsey, A., 2009, Technical summary—State of the Delaware Basin report—A report on the health of the 13,539-square-mile Delaware River Basin in Delaware, New Jersey, New York, and Pennsylvania: Delaware River Basin Commission and Partnership for the Delaware Estuary, prepared by University of Delaware, 195 p., accessed on March 11, 2019, at https://www.wrc.udel.edu/wp-content/uploads/2020/10/ State-of-the-Delaware-Basin-Report-2008.pdf. Russell, K.L., Andrews, W.J., DiFrenna, V.J., Norris, J.M., and Mason, R.R., Jr., 2024, Report of the River Master of the Delaware River for the period December 1, 2015– November 30, 2016: U.S. Geological Survey Open-File Report 2024–1022, 105 p., https://doi.org/10.3133/ ofr20241022.

Russell, K.L., Ockerman, D., Krejmas, B.E., Paulachok, G.N., and Mason, R.R., Jr., 2019, Report of the River Master of the Delaware River for the period December 1, 2009– November 30, 2010: U.S. Geological Survey OpenFile Report, 2019–1093, 128 p. [Also available at https://doi.org/10.3133/ofr20191093.] U.S. Environmental Protection Agency [EPA], 2016, Indicators—Conductivity: EPA web page, accessed August 7, 2018, at https://www.epa.gov/national-aquatic- resource-surveys/indicators-conductivity. U.S. Geological Survey [USGS], 2019a, USGS 01417000 East Branch Delaware River at Downsville NY: USGS National Water Information System database, accessed January 23, 2019, at https://waterdata.usgs.gov/nwis/dv? cb_00060=on&format=html&site_no=01417000&referred_ module=sw&period=&begin_date=2016-12-01&end_date= 2017-11-30. U.S. Geological Survey [USGS], 2019b, USGS 01425000 West Branch Delaware River at Stilesville NY: USGS National Water Information System database, accessed January 23, 2019, at https://nwis.waterdata .usgs.gov/nwis/dv?cb_00060=on&format=html&site_no= 01425000&referred_module=sw&period=&begin_date= 2016-12-01&end_date=2017-11-30. U.S. Geological Survey [USGS], 2019c, USGS 01436000 Neversink River at Neversink NY: USGS National Water Information System database, accessed January 23, 2019, at https://nwis.waterdata.usgs.gov/nwis/dv?cb_00060= on&format=html&site_no=01436000&referred_module= sw&period=&begin_date=2016-12-01&end_date= 2017-11-30. U.S. Geological Survey [USGS], 2019d, USGS 01438500 Delaware River at Montague NJ: USGS National Water Information System database, accessed January 23, 2019, at https://nwis.waterdata.usgs.gov/nwis/dv?cb_00060= on&format=html&site_no=01438500&referred_module= sw&period=&begin_date=2016-12-01&end_date= 2017-11-30. U.S. Geological Survey [USGS], 2019e, USGS 01460440 Delaware and Raritan Canal at Port Mercer NJ: USGS National Water Information System database, accessed January 23, 2019, at https://nwis.waterdata .usgs.gov/nwis/dv?cb_00060=on&format=%20html&site_ no=01460440&referred_%20module=sw&period=&begin_ date=2016-12-01&end_%20date=2017-11-30. U.S. Geological Survey [USGS], 2019f, USGS 01463500 Delaware River at Trenton NJ: USGS National Water Information System database, accessed January 23, 2019, at https://waterdata.usgs.gov/nwis/dv?cb_00060=on&format= html&site_no=01463500&referred_module=sw&period= &begin_date=2016-12-01&end_date=2017-11-30.

References Cited 61 U.S. Geological Survey [USGS], 2020a, Dissolved oxygen and water: USGS web page, accessed April 10, 2020, at https://usgs.gov/special-topic/water-science-school/science/ dissolved-oxygen-and-water?qt-science_center_objects= 0#qt-science_center_objects. U.S. Geological Survey [USGS], 2020b, pH and water: USGS web page, accessed April 10, 2020, at https://usgs.gov/special-topic/water-science-school/science/ ph-and-water?qt-science_center_objects=0#qt-science_ center_objects. U.S. Geological Survey [USGS], 2020c, Temperature and water: USGS web page, accessed April 10, 2020, at https://usgs.gov/special-topic/water-science-school/science/ temperature-and-water?qt_science_center_objects=0. U.S. Geological Survey [USGS], 2020d, USGS 01467200 Delaware River at Penn’s Landing, Philadelphia, PA: USGS National Water Information System database, accessed April 10, 2020, at https://waterdata.usgs.gov/ nwis/dv?cb_00010=on&cb_00010=on&cb_00010=on&cb_ 00010=on&cb_00010=on&cb_00300=on&cb_00300= on&cb_00400=on&cb_00400=on&format=html&site_ no=01467200&legacy=&referred_module=sw&period= &begin_date=2017-04-01&end_date=2017-11-30.

U.S. Geological Survey [USGS], 2020e, USGS 01467200 Delaware River at Penn’s Landing, Philadelphia, PA: USGS National Water Information System database, accessed March 16, 2023, at https://waterdata.usgs.gov/ monitoring-location/01467200/#parameterCode= 00300&timeSeriesId=121396&startDT=2016-12- 01&endDT=2017-11-30. U.S. Geological Survey [USGS], 2020f, USGS 01477050 Delaware River at Chester PA: USGS National Water Information System database, accessed April 10, 2020, at https://waterdata.usgs.gov/nwis/dv?cb_00300=on&cb_ 00400=on&format=html&site_no=01477050&legacy= &referred_module=sw&period=&begin_date=2016-12- 01&end_date=2017-11-30. U.S. Geological Survey [USGS], 2020g, USGS 01477050 Delaware River at Chester PA: USGS National Water Information System database, accessed March 16, 2023, at https://waterdata.usgs.gov/monitoring-location/01477050/ #parameterCode=00300&startDT=2016-12-01&endDT= 2017-11-30. U.S. Geological Survey [USGS], 2020h, USGS 01482800 Delaware River at Reedy Island Jetty, DE: USGS National Water Information System database, accessed April 10, 2020, at https://waterdata.usgs.gov/nwis/dv? cb_00095=on&cb_00400=on&format=html&site_no= 01482800&legacy=&referred_module=sw&period= &begin_date=2016-12-01&end_date=2017-11-30.

62 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Glossary The following definitions apply to various terms and procedures used in the operations documented in this report. balancing adjustment An operating procedure used by the Office of the Delaware River Master to correct for inaccuracies inherent in the design of releases from New York City reservoirs to meet the Montague flow objective at Montague, New Jersey (U.S. Geological Survey streamgaging site 01438500). The balancing adjustment calls for more water to be released when previous directed releases (a lack of releases) were insufficient to meet the Montague flow objective. This adjustment calls for less water to be released when previous directed releases were higher than required to meet the Montague flow objective. Based on provisional data, the balancing adjustment is computed as 10 percent of the difference between the cumulative adjusted directed release and the cumulative directed release required for exact forecasting. The balancing adjustment is applied to the following day’s release design. The maximum daily balancing adjustment is intentionally limited to preclude unacceptably large variations in the flow at the Montague streamgage. capacity Total useable volume in a reservoir between the point of maximum depletion and the elevation of the lower crest of the spillway. conservation releases Controlled releases from the Pepacton, Cannonsville, and Neversink Reservoirs in New York designed to maintain specified minimum flows in stream channels immediately below the reservoirs (tailwaters). The following conservation release rate zones are defined in the October 21, 2017, Flexible Flow Management Plan:

• Spill Mitigation (L1) Discharge Mitigation Releases are releases designed to help mitigate the effects of spilling immediately below the Delaware River Basin reservoirs. New York City shall make such controlled releases from the Delaware River Basin reservoirs in accordance with figures 1 and 2 and tables 4a-g in the 2017 Flexible Flow Management Program (FFMP2017). Zones or volumes may change depending on the specific requirements of the FFMP in effect at the time and may change during a report year if a new FFMP becomes effective. Three zones of reservoir-specific storage (L1–a, L1–b, and L1–c) are defined relative to two rule curves for each reservoir. • Normal (L2) Conservation releases when New York City combined reservoir storage is in the normal (L2) storage zone. • Watch (L3) Conservation releases from table 3 of FFMP2017 when New York City combined reservoir storage is in the drought watch (L3) storage zone. • Warning (L4) Conservation releases from table 3 of FFMP2017 when New York City combined reservoir storage is in the drought warning (L4) storage zone. • Drought (L5) Conservation releases from table 3 of FFMP2017 when New York City combined reservoir storage is in the drought (L5) storage zone (also referred to as Drought Emergency). directed releases Controlled releases from New York City reservoirs in the upper Delaware River Basin, designed by the Office of the Delaware River Master to meet the Montague flow objective. diversions The out-of-basin transfer of water by New York City from the Pepacton, Cannonsville, and Neversink Reservoirs of New York State in the upper Delaware River Basin through the East Delaware, West Delaware, and Neversink Tunnels, respectively, to New York City’s water supply system. Also, the out-of-basin transfer of water by New Jersey from the Delaware River through the Delaware and Raritan Canal.

Glossary 63 excess quantity As defined by the Decree, the excess quantity of water is “equal to 83 percent of the amount by which the estimated consumption by New York City during the year is less than New York City’s estimate of continuous safe yield (1,665 million gallons per day [Mgal/d] stipulated by the 1954 Decree) from all its sources of supply obtainable without pumping, except that the excess quantity shall not exceed 70 billion gallons and the seasonal period of release of the excess quantity begins on June 15 and concludes on the following March 15.” daily excess release credits Daily credits and deficits during the seasonal period (from June 15 to the following March 15) are computed as the arithmetic difference between the daily mean discharge of the Delaware River at Montague, New Jersey, and 1,750 cubic feet per second (ft3/s). The daily credit cannot exceed the 24-hour period releases from Pepacton, Cannonsville, and Neversink Reservoirs route to Montague and made in accordance with direction, except as follows: during the seasonal period, credits are also applied for part of all of the other releases from these reservoirs that contribute to the daily mean discharge at Montague between 1,750 (ft3/s) and the applicable excess release rate. Flexible Flow Management Program (FFMP) A set of rules for the management of storage, diversions, releases, and flow targets relating to the apportioning of water from the Delaware River Basin under a 1954 Decree of the Supreme Court of the United States (available at https://webapps.usgs.gov/odrm/about/ decree) and unanimously agreed to by the Decree Parties (Delaware, New Jersey, New York, New York City, and Pennsylvania). Interim Excess Release Quantity An Interim Excess Release Quantity (IERQ) was defined in the 2017 Flexible Flow Management Program (app. 2).

Effective from December 1, 2016, to May 31, 2017, the IERQ is computed as 83 percent of the difference between the highest year’s consumption of the New York City water supply system during the period 2002–2006 (1,257 million gallons per day [Mgal/d])—and New York City’s current estimate of continuous safe yield of the New York City water supply system of 1,290 Mgal/d, obtainable without pumping. The IERQ was available for release of 15,468 cubic feet per second accumulated daily ([ft3/s]-d). 3.91 billion gallons (6,045 [ft3/s]-d) of the IERQ is incorporated in the releases tables to enhance base releases from the New York City Delaware River Basin reservoirs. The IERQ balance of 6.09 billion gallons (9,423 [ft3/s]-d) is reserved and can be used for additional releases to meet the Trenton Equivalent Flow Objective or to establish an Extraordinary Needs Bank. Effective October 23, 2017, in FFMP2017, an IERQ of 10.0 billion gallons (15,468 [ft3/s]-d) shall be provided (determined as in the original FFMP) and based upon 83 percent of the difference between 1,257 Mgal/d (the highest year’s consumption of the New York City water supply system between 2002 and 2006, inclusive) and 1,290 Mgal/d (New York City’s estimate of continuous safe yield of the New York City water supply system at that time, obtainable without pumping). The IERQ shall reset to 10.0 billion gallons (15,468 [ft3/s]-d) on June 1st of each year of the Agreement or upon return to normal conditions after drought. For each year beginning June 1st of the current program, the IERQ shall be used as defined below:

64 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 Trenton Equivalent Flow Objective: 6.09 billion gallons (9,423 cubic feet per second accumulated daily [(ft3/s)-d]) of the IERQ, upon request by the “Lower Basin States” or the Delaware River Basin Commission (DRBC), New York City shall release from the IERQ water in sufficient quantities to maintain a flow at Trenton of 3,000 cubic feet per second (ft3/s) during basin-wide normal conditions for the period commencing on June 1 and continuing through May 31. NYC shall make releases from the IERQ as provided above until the aggregate quantity of the IERQ is exhausted. Thermal Mitigation: 1.62 billion gallons (2,500 [ft3/s]-d) of the IERQ is banked and available during basinwide normal conditions to support mitigation of thermal events that could adversely impact the cold-water fishery below the New York City Delaware reservoirs. Use of the water for any single event is informed by the current and forecasted basin conditions and the thermal mitigation guidance as developed by the Decree Parties. Releases for thermal mitigation shall be made at the direction of the New York State Department of Environmental Conservation (NYSDEC) and administered by the Office of the Delaware River Master (ODRM) and the New York City Department of Environmental Protection (NYCDEP) with notification made to all Decree Parties. Rapid Flow Change Mitigation: 0.65 billion gallons (1,000 [ft3/s]-d) of the IERQ is to be banked and is available during basinwide normal conditions to mitigate potentially ecologically harmful conditions caused by rapid reductions in the New York City Delaware reservoir directed releases because of the requirements of the Montague flow objective in Section 2.a. Use of the water for any single event is informed by the current basin conditions and the guidance for its use as developed by the Decree Parties. Releases to mitigate rapid flow changes shall be made at the direction of the ODRM and NYCDEP, with notification to all Decree Parties. New Jersey Diversion Amelioration: 1.65 billion gallons (2,545 [ft3/s]-d) of the IERQ is banked and reserved for use during drought conditions (basinwide or lower basin) to supply New Jersey’s increased diversion when the New Jersey Diversion Offset Bank

as described below in Section 4.d., has been exhausted. Once the New York City reservoirs enter into drought watch, the combined storage of the City Delaware Reservoirs shall be computed as the actual storage volume minus the NJ Diversion Amelioration Bank and NJ Diversion Offset Bank volumes for purposes of determining storage zones. Interim Excess Release Quantity Extraordinary (IERQ) Needs Bank In addition to the hydrologic criteria described in section 2.5.6.A. of the Water Code (18 CFR part 410) and subject to other provisional uses of the Interim Excess Release Quantity (IERQ) as provided herein, the Decree Parties, the DRBC, and the ODRM may at any time review extraordinary water needs to support such research, aquatic-life, or other water-use activity as may be approved by the DRBC. Upon unanimous agreement, the Decree Parties may reallocate all or a portion of the IERQ uses identified in section 3.c remaining at such time, and such portion shall be placed in an IERQ Extraordinary Needs Bank and used to provide for such extraordinary water needs. Such quantity as may be reallocated shall be deducted from the agreed upon IERQ source as defined above. Any unused Extraordinary Needs Bank water shall be returned to IERQ. key gaging stations Specific sites on the East Branch Delaware River, West Branch Delaware River, Neversink River, Delaware and Raritan Canal, and mainstem Delaware River where continuous, systematic observations of gage height and discharge are made. Data from these sites are used on a year-round basis in the Office of the Delaware River Master operations. maximum reservoir depletion The minimum water-surface level or elevation below which a reservoir ceases to continue making delivery of quantities of water for all purposes for which the reservoir was designed. This level is also referred to as minimum full-operating level.

Glossary 65 Montague flow objective In section 2a of the October 21, 2017 Flexible Flow Management Program (FFMP2017; app. 2), “Except with respect to limitations provided herein in Section 5, releases from the City Delaware Basin Reservoirs shall be in quantities designed to maintain, during Normal storage conditions, a minimum basic rate of flow at the gaging station of the U.S. Geological Survey * * * at Montague, N. J. of 1,750 cubic feet per second (cfs), as directed by the River Master in accordance with Section VII. [sic] of the Decree. During Basinwide Drought Watch, Drought Warning, and Drought Emergency, in accordance with Section 5 of this Agreement and Section 2.5.3.B. [sic] and Tables 1 and 2 of the Delaware River Basin Water Code * * *, the Montague flow objective shall vary based upon the time of year and location of the salt front, and minimum compensating releases shall be made by the City of New York from its reservoirs in the upper Delaware Basin.” The Delaware River Basin Water Code can be found in the Code of Federal Regulations (18 CFR part 410). rate of flow Mean discharge for a specified 24-hour period, in cubic feet per second (ft3/s) or million gallons per day (Mgal/d). rate of flow at Montague Daily mean discharge of the Delaware River at Montague, New Jersey, computed on a calendar-day basis. The Montague flow objective is a benchmark used to control upstream releases and withdrawals of water from the Delaware River Basin. reservoir-controlled releases Controlled releases from reservoirs passed through outlet valves in the dams or through turbines in powerplants. These releases do not include spillway overflow at the reservoirs.

salt front The salt front is defined as the 250 parts-per-million isochlor, or line of equal chloride concentration, in the Delaware River estuary—1 part per million is 1 part of solute (in this case, chloride) per 1 million parts of solvent (river water). The 7-day average location of the salt front is used as an indicator of salinity intrusion in the Delaware River estuary and a factor affecting the Montague and Trenton flow objectives during drought emergencies. storage or contents Usable volume of water in a reservoir. Unless otherwise indicated, volume is computed on the basis of the level of pool above the point of maximum depletion. time of day Time of day is expressed in 24-hour Eastern Standard Time, which during the report year included a 23-hour day on March 12 and a 25-hour day on November 5. Trenton flow objective In section 2b of the October 21, 2017, Flexible Flow Management Program (FFMP2017; app. 2), “Section 2.5.3 of the Water Code establishes a set of equivalent flow objectives at Trenton, N.J. to control salinity intrusion in the Delaware Estuary. * * * During Basinwide Drought Watch, Drought Warning, and Drought Emergency, in accordance with Section 5 of this Agreement and Section 2.5.3.B. [sic] and Tables 1 and 2 of the Water Code, the Trenton Equivalent Flow Objective shall vary based upon the time of year and location of the salt front, and minimum compensating releases shall be made by the City of New York from its reservoirs in the upper Delaware Basin.” The Delaware River Basin Water Code can be found in the Code of Federal Regulations (18 CFR part 410). uncontrolled runoff at Montague Runoff from the 3,480-square-mile drainage area above Montague, New Jersey, excluding the drainage area above the Pepacton, Cannonsville, and Neversink Reservoirs; Lake Wallenpaupack: and the Rio Reservoir, but including spillway overflow at these dams.

66 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Appendix 1. Four-Party Letter for Interim Operations A letter, signed by four of the five Decree Parties of the Amended Decree of the U.S. Supreme Court (New Jersey v. New York, 347 U.S. 995 (1954)), notified the Office of the Delaware River Master of the intent to continue higher conservation releases consistent with recent operational plans rather than those established by reverting to DRBC Docket No. D–77–20 CP (Revised), which went into effect June 1, 2017. A copy of the letter is provided here as appendix 1.

Appendix 1. Four-Party Letter for Interim Operations 67

68 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

Appendix 2. Agreement For a Flexible Flow Management Program 69

Appendix 2. Agreement For a Flexible Flow Management Program An agreement affecting the Amended Decree of the U.S. Supreme Court in New Jersey v. New York, 347 U.S. 995 (1954), for managing diversions and releases under the Decree, was consented to by all of the Decree Parties: the State of Delaware, the State of New Jersey, the State of New York, the Commonwealth of Pennsylvania, and the City of New York. The agreement is a 10-year, two-part successor to the Flexible Flow Management Program that ended on May 31, 2016. A copy of the agreement and the associated operations plan, both of which went into effect beginning October 23, 2017, are included as appendix 2 here; the original page numbers were removed to avoid confusion. The agreement and operations plan, respectively, are available through the U.S. Geological Survey website (https://webapps.usgs.gov/odrm/documents/ffmp/FFMP2017.pdf; https://webapps.usgs.gov/odrm/documents/ffmp/FFMP2017_Appendix_A.pdf).

70 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 AGREEMENT FOR A FLEXIBLE FLOW MANAGEMENT PROGRAM

This Agreement to establish a Flexible Flow Management Program (FFMP2017 or this Agreement), is consented to by and among the State of Delaware (DE), the State of New Jersey (NJ), the State of New York (NY), the Commonwealth of Pennsylvania (PA), and the City of New York (NYC or City), (herea�er Decree Par�es) who are Par�es to the Amended Decree (Decree) of the U.S. Supreme Court in New Jersey v. New York, 347 U.S. 995 (1954). RECITALS 1. In 1954, the United States Supreme Court entered a Decree in New Jersey v New York, 347 U.S. 995 (1954) (Decree). That Decree established certain rights and obliga�ons for New York City and New Jersey concerning diversions of water out of the Delaware River Basin. Delaware, New Jersey, New York, Pennsylvania and New York City (hereina�er collec�vely referred to as the Decree Par�es) were all Par�es to the Supreme Court ac�on and are bound by the terms of the Decree. 2. In 1961, Delaware, New Jersey, New York, Pennsylvania and the United States (hereina�er referred to collec�vely as the Compact Par�es) entered into the Delaware River Basin Compact (Compact). The Compact established the Delaware River Basin Commission (DRBC or Commission), made up of the Compact Par�es. The Compact provided the Commission with various authori�es regarding water and associated management within the Delaware River Basin, subject to certain restric�ons related to the Decree. 3. Ar�cle 3.4 of the Compact provides that the Compact Par�es waived and relinquished for the dura�on of the Compact any right, privilege or power they may have to apply for any modiﬁca�on of the terms of the Decree which would increase or decrease the diversions

Appendix 2. Agreement For a Flexible Flow Management Program 71 FFMP2017 authorized or increase or decrease the releases required under the Decree except as may otherwise be provided in Ar�cle 3.3 of the Compact. 4. Ar�cle 3.3 of the Compact provides that the diversions, compensa�ng releases, rights, condi�ons, obliga�ons, and provisions for the administra�on of the Decree shall not be impaired, diminished or otherwise adversely aﬀected without the unanimous consent of the Decree Par�es, except during a Commission-declared state of emergency and a�er the Commission consults with the River Master. 5. In November 1982, the Decree Par�es nego�ated the Good Faith Agreement (GFA). The GFA included recommenda�ons to the Commission for modiﬁed diversions and releases related to the opera�on of Cannonsville, Pepacton, and Neversink Reservoirs (New York City Reservoirs) and diversions by New Jersey. The recommended modiﬁca�ons, among other things, addressed drought-related diversion and release issues emana�ng from record drought in the 1960s as well as conserva�on-related releases. The GFA also included the unanimous consent of the Decree Par�es to these proposed modiﬁca�ons. 6. The GFA recommenda�ons for reduc�ons during periods of drought in diversions by New York City and New Jersey and in ﬂow objec�ves were incorporated into the Commission’s Water Code through DRBC Resolu�on 83-13, also with the unanimous consent of the Decree Par�es. 7. The GFA recommenda�ons for augmented conserva�on releases from the New York City Reservoirs were adopted by the Commission as Docket D-77-20 CP (Revised) and were made a part of the Commission’s Comprehensive Plan. With the unanimous consent of the Decree Par�es, the provisions of D-77-20 CP (Revised) were modiﬁed several �mes on a temporary and experimental basis by means of Commission-issued dockets, through 2007.

8. In 2007, the Decree Par�es, through unanimous consent, s�pulated to the ﬁrst of a series of ﬂexible ﬂow management programs that were implemented in lieu of D-77-20 CP (Revised) and

72 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 revisions. The ﬂexible ﬂow management program and its subsequent revisions modiﬁed the diversions by New Jersey under drought condi�ons and created a tailwater habitat protec�on program and a discharge mi�ga�on program. 9. Upon termina�on of each applicable ﬂexible ﬂow management program and absent an agreement to proceed in another way, diversions and releases from New York City reservoirs and diversions by New Jersey would be in accordance with the provisions of D-77-20 CP (Revised) and the Water Code. 10. The most recent Flexible Flow Management Program terminated on May 31, 2017. 11. The Decree Par�es have sought and obtained public comments in the formula�on of this and prior agreements for the implementa�on of ﬂexible ﬂow management programs on the Delaware River. The Decree Par�es will con�nue to seek public input as they implement the 2017 Flexible Flow Management Program (FFMP2017) and nego�ate successor agreements. 12. The Decree Par�es have met and conferred and have agreed to a program for the management of diversions, releases, and related opera�onal procedures on the Delaware River that, for the term of this Agreement, will supersede and replace exis�ng diversion, release and related opera�onal procedures for the Delaware River. The Decree Par�es during the term of this Agreement shall work to modify the program and to nego�ate a long-term agreement to replace this agreement. AGREEMENT AND UNANIMOUS CONSENT Accordingly, the Decree Par�es, consistent with the provisions of the Compact, HEREBY UNANIMOUSLY AGREE AND CONSENT to the following:

Appendix 2. Agreement For a Flexible Flow Management Program 73

74 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 result of the studies referenced in Sec�on IV.3, the FFMP2017 shall be modiﬁed and implemented accordingly. Nego�a�on necessary to reach unanimous consent regarding modiﬁca�ons to Appendix A or the Agreement may be based on the criteria set forth in Sec�on IV.3. Modiﬁca�ons shall be recorded by and managed through the Oﬃce of the River Master at the request of the Decree Par�es. A�er any modiﬁca�on is signed by all the Decree Par�es, it will be made available to the public. 2. The Decree Par�es have iden�ﬁed in Sec�ons IV.3 through IV.5 a list of ma�ers to be evaluated throughout the term of this Agreement. In reviewing proposed modiﬁca�ons to the FFMP2017 the Decree Par�es shall consider, but are not limited to, in no order of priority, the following: (a.) Decree Party equity (b.) Net beneﬁts and costs to environmental and economic resources (c.) Source and sustainability of water available to support modiﬁca�on and the environmental or economic resource(s) (d.) Habitat types—with naturally-occurring habitats receiving considera�on over humanmade habitats (e.) Scien�ﬁc basis for modiﬁca�on (f.) Impacts to drought management, water supply and ﬂood mi�ga�on, including but not limited to: (i.) frequency, dura�on and seasonal �ming of the various levels of drought; and (ii.) frequency, dura�on, levels of storage, diversions, releases and ﬂows (g.) Extent to which the diversions and the Montague minimum basic rate of ﬂow provided in the Decree are met (h.) Poten�al impacts to water quality, exis�ng or dra� Na�onal and State Pollu�on Discharge Elimina�on System permits and the assimila�ve capacity of the Delaware River (i.) Ease and prac�cability of opera�on (j.) Consistency with adap�ve management principles (k.) Applicability and implementa�on of water conserva�on prac�ces (l.) Impacts to salinity, including those associated with sea level rise.

Appendix 2. Agreement For a Flexible Flow Management Program 75 FFMP2017 3. Through May 31, 2023, the Decree Par�es shall support and conduct the required studies and evalua�ons outlined in this Agreement in accordance with mutually agreeable scope, work schedules and �melines. The scope and work schedules will include progress monitoring and deﬁned milestones. The Decree Par�es will endeavor to commence the studies described below within six months of the execu�on of this Agreement, including comple�ng scopes and schedules of work and iden�fying roles and responsibili�es of the Decree Par�es, the River Master’s Oﬃce and other external par�es as appropriate. a. The primary objec�ves of the studies will be to evaluate the impacts and condi�ons resul�ng from the following: i. The detachment of releases from the New York City Delaware Reservoirs from the posi�on of the salt front during drought emergency and replacing the beneﬁt that New York City releases have with respect to the salt front with an alterna�ve methodology or methodologies that will provide comparable protec�on for exis�ng resources within the Basin. ii. The increase in the New Jersey Diversion during drought condi�ons (basinwide and/or lower basin). iii. The increase in available storage for the lower Basin from either the op�miza�on of exis�ng storage or the development of new storage in the Basin in accordance with the mutually adopted GFA and water planning eﬀorts conducted by the Decree Par�es. b. The studies iden�ﬁed in subdivision (a) above will evaluate the impacts to: the salt front, aqua�c and ﬁshery resources in the Basin, and projec�ons of future sea level rise to salinity. The studies will also evaluate whether the changes iden�ﬁed in subdivisions IV.3.a.i through iii above will provide for comparable protec�on for exis�ng resources

76 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 and uses within the Basin to avoid signiﬁcant adverse impacts to the Basin. If studies by the Decree Par�es or external en��es on behalf of a Decree Party support that detachment provides comparable protec�on for exis�ng resources and uses within the Basin and does not cause signiﬁcant adverse impacts, then detachment will be implemented between June 1, 2023 and May 31, 2028, based on a schedule to be unanimously determined by the Decree Par�es. 4. The Decree Par�es shall study, evaluate, and consider the River Master’s balancing adjustment procedure. 5. During the second ﬁve years of this Agreement, from June 1, 2023 through May 31, 2028, the Decree Par�es shall iden�fy and s�pulate by unanimous consent the method of calcula�ng the Excess Release Quan�ty. 6. The studies described in Sec�ons IV.3 and IV.4 shall consider the following, as relevant, in no par�cular order of priority: (a.) Coordina�on with DRBC plans and programs (b.) Climate change and sea level rise (c.) Thermal mi�ga�on for habitat and ecological protec�on (d.) Rapid ﬂow change mi�ga�on (e.) Alternate uses of the F.E. Walter Reservoir (f.) Montague and Trenton ﬂow objec�ves (g.) Drought management (h.) Flood mi�ga�on (i.) Op�miza�on of use of other sources of augmenta�on ﬂows (j.) Endangered species (k.) Cold and warm-water and migratory ﬁshery resources (l.) Estuary and bay ecological health

Appendix 2. Agreement For a Flexible Flow Management Program 77 FFMP2017 (m.) Other relevant condi�ons

V. CONSENT PURSUANT TO ARTICLE 3.3 OF THE COMPACT; RESOLUTION OF CONFLICTS This Agreement is a s�pula�on among the Decree Par�es and cons�tutes the unanimous consent for DRBC to take certain ac�ons authorized by Ar�cle 3.3 of the Compact. The Decree Par�es shall implement this Agreement in advance and independent of any ac�on by DRBC to amend Docket D77-20 CP (Revised) and the Water Code to be consistent with this Agreement. In the case of a conﬂict among the provisions of this Agreement on the one hand, and DRBC Docket D 77-20 CP (Revised) or the Delaware River Basin Water Code, 18 CFR Part 410, Sec�ons 2.5.3 through 2.5.6 (drought opera�ons) on the other, the provisions of FFMP2017 will, nonetheless, be implemented during the term of this Agreement, un�l and unless the conﬂicts are resolved. VI. RESERVATIONS 1. Nothing contained herein is nor should it be deemed to cons�tute a waiver or modiﬁca�on of, or limita�on on, the Decree Par�es’ rights under the Decree or with respect to any other legal right, obliga�on, or duty. This Agreement shall not be cited as precedent of any inten�on to waive, modify, or limit such rights. 2. The Decree Par�es have authorized certain ac�ons, as part of FFMP2017 including, but not limited to discharge mi�ga�on releases, to assist in mi�ga�ng the impacts of ﬂooding immediately below the New York City Delaware Basin Reservoirs. By incorpora�ng ﬂood mi�ga�on as an objec�ve and taking the ac�ons provided herein, the Decree Par�es do not create or assume any du�es or obliga�ons regarding ﬂood mi�ga�on or in any way modify any such du�es or obliga�ons that may be otherwise prescribed by law.

78 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017

VII. TERMINATION AND REVERSION 1. Any Decree Party may terminate this Agreement by providing wri�en no�ce to the other Decree Par�es of its intent to terminate this Agreement. This wri�en no�ce shall be provided not less than 30 days prior to such termina�on date. The Decree Par�es agree to enter into good faith nego�a�ons to determine a course of ac�on in the event of such termina�on. 2. Upon any failure by the Decree Par�es to con�nue this Agreement, including opera�ons described in Appendix A, as described in Sec�on III.4 or Sec�on VII.1, and without a subsequent executed agreement, opera�ons shall revert to those provided in DRBC Docket D-77-20 CP (Revised) and Sec�ons 2.5.3 through 2.5.6 of the DRBC Water Code. VIII.

SAVINGS PROVISION FOR NEW JERSEY DIVERSIONS AND DIVERSION BANK 1. Upon termina�on of this Agreement prior to May 31, 2028, pursuant to Sec�on III.4 or Sec�on VII.1, by any Decree Party other than New Jersey: a. The River Master shall set aside, maintain, and make available a total of 1.034 billion gallons of the Excess Release Quan�ty as the “New Jersey Surviving Diversions Bank” for purpose of oﬀse�ng New Jersey’s diversions under Subdivision VIII.1.b during drought condi�ons. b. New Jersey’s right to diversions in accordance with Sec�on 4, Table 1 of Appendix A shall be allowed to take place un�l May 31, 2023 if such termina�on occurs prior to June 1, 2023 or un�l May 31, 2028 if such termina�on occurs a�er May 31, 2023. 2. The New Jersey Surviving Diversions Bank shall be accounted for and used as follows: a. Once the New York City Reservoirs enter into drought watch, the combined storage of the New York City Delaware Reservoirs, for the purposes of determining drought

Appendix 2. Agreement For a Flexible Flow Management Program 79 FFMP2017 opera�ons, shall be computed as the actual storage volume minus the New Jersey Surviving Diversions Bank volumes for purposes of determining storage zones. b. If the accumulated incremental increased diversions by New Jersey, 1 at any �me, exceed the available water in the New Jersey Surviving Diversions Bank, the Lower Basin Reservoirs in Pennsylvania will provide the addi�onal water to oﬀset New Jersey’s diversions. c. Releases from the New Jersey Surviving Diversions Bank shall be at the direc�on of DRBC with prior no�ﬁca�on to New Jersey, and will be implemented by the River Master. Releases from the Lower Basin Reservoirs for New Jersey’s diversion, if necessary, shall be at the direc�on of DRBC, in consulta�on with and at the request of New Jersey. d. Releases from the New Jersey Surviving Diversions Bank or from the Lower Basin Reservoirs in Pennsylvania to oﬀset New Jersey’s incremental increases in out-ofbasin diversions, measured at Port Mercer, NJ shall be in accordance with �ming procedures agreed upon by DRBC, New Jersey and the River Master. No oﬀse�ng or accoun�ng for oﬀse�ng is required for New Jersey’s increased diversion on any day when DRBC determines that no water is required to meet the current Trenton ﬂow objec�ve. e. The River Master will maintain the ongoing accoun�ng for releases made from this bank. At no �me during the year commencing June 1st shall releases from the New Jersey Surviving Diversions Bank exceed the balance of the bank. The bank will reset under normal condi�ons on June 1st. If under basin wide drought condi�ons on May

The accumulated incremental increased diversions by New Jersey shall be the diﬀerences in New Jersey’s diversion, computed on the basis of Table 1 of the Good Faith Agreement, and the corresponding rates in Sec�on 4, Table 1 of FFMP2017.

80 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 31st the balance of the New Jersey Surviving Diversions Bank shall remain available for use until normal conditions resume based on Figure 1 of Section 2.5.3. of the Water Code. Upon return to normal conditions, the New Jersey Surviving Diversions Bank will reset. 3. This Section VIII shall survive this Agreement until it expires on May 31, 2028.

Appendix 2. Agreement For a Flexible Flow Management Program 81

FFMP2017

Agreement and Consent of the Par�es to the 1954 U.S. Supreme Court Decree Eﬀec�ve October 21, 2017

STATE OF DELAWARE

The State of Delaware hereby approves this Agreement of the Par�es to the U.S. Supreme Court Decree of 1954 for a Flexible Flow Management Program and consents to the submission of this Agreement to the Delaware River Basin Commission for adop�on, exactly as dra�ed, or exactly as otherwise unanimously consented to by the Decree Par�es, as appropriate through rules, dockets and/ or resolu�ons, provided, however, that the State of Delaware retains the right to terminate this Agreement or otherwise withdraw consent, consistent with the provisions of Paragraphs III.4, VII and VIII herein, in which case opera�ons shall revert to those provided in DRBC Docket D-77-20 CP (Revised) and sec�ons 2.5.2 through 2.5.6 of the DRBC Water Code, adopted by Resolu�ons 88-13 and 88-22 (revised) except as otherwise provided in the agreement and provided further that this approval and consent is subject to the further agreement of the Par�es as provided for in Sec�on 3.3(a) of the Delaware River Basin Compact.

//Signed by David R. Wunsch// ____________________________________

82 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

FFMP2017

Agreement of the Par�es to the 1954 U.S. Supreme Court Decree Eﬀec�ve October 21, 2017

STATE OF NEW JERSEY

The State of New Jersey hereby approves this Agreement of the Par�es to the U.S. Supreme Court Decree of 1954 for a Flexible Flow Management Program and consents to the submission of this Agreement to the Delaware River Basin Commission for adop�on, exactly as dra�ed, or exactly as otherwise unanimously consented to by the Decree Par�es, as appropriate through rules, dockets and/ or resolu�ons, provided, however, that the State of New Jersey retains the right to terminate this Agreement or otherwise withdraw consent, consistent with the provisions of Paragraphs III.4, VII and VIII herein, in which case opera�ons shall revert to those provided in DRBC Docket D-77-20 CP (Revised) and sec�ons 2.5.2 through 2.5.6 of the DRBC Water Code, adopted by Resolu�ons 88-13 and 88-22 (revised) except as otherwise provided in the agreement and provided further that this approval and consent is subject to the further agreement of the Par�es as provided for in Sec�on 3.3(a) of the Delaware River Basin Compact.

//Signed by Michelle Putnam// ____________________________________

Appendix 2. Agreement For a Flexible Flow Management Program 83

FFMP2017

Agreement of the Par�es to the 1954 U.S. Supreme Court Decree Eﬀec�ve October 21, 2017

CITY OF NEW YORK

The City of New York hereby approves this Agreement of the Par�es to the U.S. Supreme Court Decree of 1954 for a Flexible Flow Management Program and consents to the submission of this Agreement to the Delaware River Basin Commission for adop�on, exactly as dra�ed, or exactly as otherwise unanimously consented to by the Decree Par�es, as appropriate through rules, dockets and/ or resolu�ons, provided, however, that the City of New York retains the right to terminate this Agreement or otherwise withdraw consent, consistent with the provisions of Paragraphs III.4, VII and VIII herein, in which case opera�ons shall revert to those provided in DRBC Docket D-77-20 CP (Revised) and sec�ons 2.5.2 through 2.5.6 of the DRBC Water Code, adopted by Resolu�ons 88-13 and 88-22 (revised) except as otherwise provided in the agreement and provided further that this approval and consent is subject to the further agreement of the Par�es as provided for in Sec�on 3.3(a) of the Delaware River Basin Compact.

//Signed by Paul Rush// ____________________________________

84 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

FFMP2017

Agreement of the Par�es to the 1954 U.S. Supreme Court Decree Eﬀec�ve October 21, 2017

STATE OF NEW YORK

The State of New York hereby approves this Agreement of the Par�es to the U.S. Supreme Court Decree of 1954 for a Flexible Flow Management Program and consents to the submission of this Agreement to the Delaware River Basin Commission for adop�on, exactly as dra�ed, or exactly as otherwise unanimously consented to by the Decree Par�es, as appropriate through rules, dockets and/ or resolu�ons, provided, however, that the State of New York retains the right to terminate this Agreement or otherwise withdraw consent, consistent with the provisions of Paragraphs III.4, VII and VIII herein, in which case opera�ons shall revert to those provided in DRBC Docket D-77-20 CP (Revised) and sec�ons 2.5.2 through 2.5.6 of the DRBC Water Code, adopted by Resolu�ons 88-13 and 88-22 (revised) except as otherwise provided in the agreement and provided further that this approval and consent is subject to the further agreement of the Par�es as provided for in Sec�on 3.3(a) of the Delaware River Basin Compact.

//Signed by Mark Klotz// ____________________________________

Appendix 2. Agreement For a Flexible Flow Management Program 85

FFMP2017

Agreement of the Par�es to the 1954 U.S. Supreme Court Decree Eﬀec�ve October 21, 2017

COMMONWEALTH OF PENNSYLVANIA

The Commonwealth of Pennsylvania hereby approves this Agreement of the Par�es to the U.S. Supreme Court Decree of 1954 for a Flexible Flow Management Program and consents to the submission of this Agreement to the Delaware River Basin Commission for adop�on, exactly as dra�ed, or exactly as otherwise unanimously consented to by the Decree Par�es, as appropriate through rules, dockets and/ or resolu�ons, provided, however, that the Commonwealth of Pennsylvania retains the right to terminate this Agreement or otherwise withdraw consent, consistent with the provisions of Paragraphs III.4, VII and VIII herein, in which case opera�ons shall revert to those provided in DRBC Docket D-77-20 CP (Revised) and sec�ons 2.5.2 through 2.5.6 of the DRBC Water Code, adopted by Resolu�ons 88-13 and 88-22 (revised) except as otherwise provided in the agreement and provided further that this approval and consent is subject to the further agreement of the Par�es as provided for in Sec�on 3.3(a) of the Delaware River Basin Compact.

//Signed by Lisa Daniels// ____________________________________

86 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN

APPENDIX A FLEXIBLE FLOW MANAGEMENT PROGRAM

This Flexible Flow Management Program (FFMP or FFMP2017) is the program referred to in the Agreement for a Flexible Flow Management Program and consented to by the Parties (the State of Delaware, the State of New Jersey, the State of New York, the Commonwealth of Pennsylvania, and the City of New York; hereafter Decree Parties or Parties) to the Amended Decree of the Supreme Court in New Jersey v. New York, 347 U.S. 995 (1954), (hereafter Decree). References herein to “Agreement” are to that document and modifications, if any, to this FFMP shall be pursuant to the provisions of the Agreement. Accordingly, the FFMP shall be implemented as follows:

DIVERSIONS a.

New York City

In accordance with Section III.A. of the Decree, and subject to the limitations provided herein, at st no time during any twelve-month period, commencing June 1 , shall the aggregate total quantity of water diverted by the City, divided by the number of days elapsed since the preceding May st 31 , exceed 800 million gallons per day (mgd). The City shall be subject to the conditions and obligations in connection with the diversions, and releases to maintain the Montague flow objective, set forth in Section III.B. of the Decree, and to the limitations provided herein in Section 4. For the term of the Agreement, the City shall make releases from its Delaware Basin Reservoirs in accordance with the releases schedules incorporated herein. b.

New Jersey

In accordance with Section V. of the Decree, except with respect to limitations provided herein in Section 4, the State of New Jersey may divert outside the Delaware River watershed, from the Delaware River or its tributaries in New Jersey, without compensating releases, the equivalent of 100 mgd under the supervision of the Delaware River Master (River Master) established by the Decree and shall be subject to the following conditions and obligations: i.

The State of New Jersey may divert not to exceed 100 mgd as a monthly average, with the diversion on any day not to exceed 120 million gallons.

ii.

Pursuant to Section V.2. of the Decree, if and when the State of New Jersey has built and is utilizing one or more reservoirs to store waters of the Delaware River or its tributaries for the purpose of diversion to another watershed, it may withdraw water from the Delaware River or its tributaries into such impounding reservoirs without limitation except during the months of July, August, September and October of any year, when not more than 100 mgd as a monthly average and not more than 120 million gallons in any day shall be withdrawn. This restriction may be modified upon unanimous consent of the Decree Parties should the State of New Jersey purchase or lease reallocated water or new storage from an existing or new facility.

iii.

Regardless of whether the State of New Jersey builds and utilizes storage reservoirs for diversion, its total diversion for use outside of the Delaware River

Appendix 2. Agreement For a Flexible Flow Management Program 87 FFMP2017 OPERATIONS PLAN watershed without compensating releases shall not exceed an average of 100 mgd during any calendar year. 2.

FLOW OBJECTIVES a.

Montague Flow Objective

Except with respect to limitations provided herein in Section 3, releases from the City Delaware Basin Reservoirs shall be in quantities designed to maintain, during Normal storage conditions, a minimum basic rate of flow at the gaging station of the United States Geological Survey (USGS) at Montague, N.J. of 1,750 cubic feet per second (cfs), as directed by the River Master in accordance with Section VII. of the Decree. During Basinwide Drought Watch, Drought Warning, and Drought Emergency, in accordance with Section 4 of this FFMP and Section 2.5.3.B. and Tables 1 and 2 of the Delaware River Basin Water Code (Water Code), the Montague flow objective shall vary based upon the time of year and location of the salt front, and minimum compensating releases shall be made by the City of New York from its reservoirs in the upper Delaware Basin. The Decree Parties, with the guidance of the Operations Support Tool described herein in Section 5 shall seek to maximize the frequency of the minimum basic rate of 1,750 cfs flows at the USGS gaging station at Montague, N.J. without adversely impacting basin water supplies and other objectives of the FFMP. b.

Trenton Equivalent Flow Objective

Section 2.5.3 of the Water Code establishes a set of equivalent flow objectives at Trenton, N.J. to control salinity intrusion in the Delaware Estuary. One means to manage salinity is through releases from Beltzville and Blue Marsh Reservoirs. Blue Marsh Reservoir is located on the Schuylkill River and is downstream of the USGS gaging station at Trenton, N.J. Releases from Blue Marsh Reservoir, as well as bypass flows from Yardley and the Point Pleasant Pumping station, are considered to be as effective at repelling salinity as water entering the estuary from the main stem Delaware River at Trenton. The Trenton Equivalent Flow is computed as the sum of flows at the USGS Trenton gaging station, releases in excess of conservation releases from Blue Marsh Reservoir, and an amount of water, determined by the Delaware River Basin Commission (DRBC), to account for bypass flows via Yardley and the Point Pleasant Pumping Station. This value is compared to the Trenton Equivalent Flow Objective to determine if the flow objective was satisfied. During Basinwide Drought Watch, Drought Warning, and Drought Emergency, in accordance with Section 4 of this Agreement and Section 2.5.3.B. and Tables 1 and 2 of the Water Code, the Trenton Equivalent Flow Objective shall vary based upon the time of year and location of the salt front. 3.

RELEASES a.

Conservation Releases from the City Delaware Basin Reservoirs

Conservation releases designed for protection of the ecology in the stream reaches below the City Delaware Basin Reservoirs, including water quality, fisheries, and aquatic habitat needs, shall be made at the rates described in the Habitat Protection Program in Section 5 below.

88 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN b.

Excess Release Quantity

Section III.B.1.(c) of the Decree defines an excess amount of water, known herein as the Excess Release Quantity (ERQ). For the period of the current program, the Decree Parties agree to use the Excess Release Quantity in support of an Interim Excess Release Quantity (IERQ) as defined in Paragraph c. below. c.

Interim Excess Release Quantity

An IERQ of 10.0 billion gallons (15,468 cfs-days) shall be provided (determined as in the original FFMP) and based upon 83 percent of the difference between 1,257 mgd (the highest year’s consumption of the NYC water supply system between 2002 and 2006 inclusive) and 1,290 mgd (NYC’s estimate of continuous safe yield of the NYC water supply system at that time, obtainable st without pumping). The IERQ shall reset to 10.0 BG (15,468 cfs-days) on June 1 of each year of the Agreement or upon return to normal conditions after drought. st

For each year beginning June 1 of the current program, the IERQ shall be used as defined below: i.

Trenton Equivalent Flow Objective: 6.09 billion gallons (9,423 cfs-days) of the IERQ, upon request by the Lower Basin States or the DRBC, NYC shall release from the IERQ water in sufficient quantities to maintain a flow at Trenton of 3,000 cfs during basin wide normal conditions for the period commencing on June 1 and continuing through May 31. NYC shall make releases from the IERQ as provided above until the aggregate quantity of the IERQ is exhausted.

ii.

Thermal Mitigation: 1.62 billion gallons (2,500 cfs-days) of the IERQ will be banked and is available during basinwide normal conditions to support mitigation of thermal events which may adversely impact the cold-water fishery below the NYC Delaware Reservoirs. Use of the water for any single event will be informed by the current and forecasted basin conditions and the thermal mitigation guidance as developed by the Decree Parties. Releases for Thermal Mitigation shall be made at the direction of the New York State Department of Environmental Conservation (“NYSDEC”) and administered by the River Master and the New York City Department of Environmental Protection (“NYCDEP”) with notification made to all Decree Parties.

iii.

Rapid Flow Change Mitigation: 0.65 billion gallons (1,000 cfs-days) of the IERQ will be banked and is available during basinwide normal conditions to mitigate potentially ecologically harmful conditions caused by rapid reductions in the NYC Delaware Reservoir directed releases because of the requirements of the Montague Flow Objective in Section 2.a. Use of the water for any single event will be informed by the current basin conditions and the guidance for its use as developed by the Decree Parties. Releases to mitigate rapid flow changes shall be made at the direction of the River Master and NYCDEP, with notification to all Decree Parties.

iv.

NJ Diversion Amelioration: 1.65 billion gallons (2,545 cfs-days) of the IERQ will be banked and reserved for use during drought conditions (basinwide and/or lower basin), to supply NJ’s increased diversion when the NJ Diversion Offset Bank, as described below in Section 4.d., has been exhausted. Once the NYC Reservoirs enter into drought watch, the combined storage of the City Delaware Reservoirs shall be computed as the actual storage volume minus the NJ Diversion Amelioration Bank and NJ Diversion Offset Bank volumes for purposes of determining storage zones.

Appendix 2. Agreement For a Flexible Flow Management Program 89 FFMP2017 OPERATIONS PLAN d.

Interim Excess Release Quantity Extraordinary Needs Bank

In addition to the hydrologic criteria described in Section 2.5.6.A. of the Water Code and subject to other provisional uses of the IERQ as provided herein, the Decree Parties, the DRBC and the River Master may at any time review extraordinary water needs to support such research, aquatic-life, or other water-use activity as may be approved by the DRBC. Upon unanimous agreement, the Decree Parties may reallocate all or a portion of the IERQ uses identified in section 3.c remaining at such time, and such portion shall be placed in an IERQ Extraordinary Needs Bank and used to provide for such extraordinary water needs. Such quantity as may be reallocated shall be deducted from the agreed upon IERQ source as defined above. Any unused Extraordinary Needs Bank water shall be returned to IERQ. 4.

DROUGHT MANAGEMENT Figure 1 defines five zones of combined reservoir usable storage relative to the three drought management rule curves (Drought Watch, Drought Warning, and Drought Emergency creating Zones L3, L4, and L5, respectively) and one additional curve that subdivides the Normal storage zone into two zones (L1 – discharge mitigation and L2- normal). The three drought management zones are described below. The two normal conditions storage zones are described in Section 5. During the effective period of this Agreement, the following drought stage definitions and procedures will be in effect: a.

Drought Watch (L3)

The seasonally segmented line (shown as dashes) dividing the current Drought Warning in Figure 1 of DRBC Resolution No. 83-13 and DRBC Docket No. D-77-20 CP (Revised) is raised by four (4) billion gallons during the entire year. In addition, the upper half of the Drought Warning zone, previously referred to as DW1 in DRBC Resolution No. 83-13, is hereby designated Drought Watch, with diversions and flow objectives as shown in Table 1. b.

Drought Warning (L4)

The lower half of the Drought Warning zone (DW2), based upon the rule curves included in DRBC Resolution No. 83-13 and as modified by Paragraph a. above, is hereby designated Drought Warning, with diversions and flow objectives as shown in Table 1. New Jersey’s maximum average monthly diversion from the Delaware River Basin via the Delaware and Raritan Canal shall be in accordance with Table 1, when said diversion shall not exceed a daily running average of 90 mgd commencing on the day such Drought Emergency becomes effective. Under all City Delaware Basin Reservoir combined storage conditions, New Jersey’s diversion on any day shall not exceed 120 million gallons.

Drought Emergency (L5)

The operation level named “Drought” in the rule curves included in DRBC Resolution No. 83-13 and Docket D-77-20 CP (Revised) is hereby designated Drought Emergency. During Drought Emergency, diversions shall be limited as shown in Table 1. The Montague and Trenton Equivalent Flow Objectives are shown in Tables 1 and 2.

90 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN New York City’s diversions from the Delaware River Basin shall be in accordance with Table 1 (Interstate Operation Formula for Diversions and Flow Objectives). Minimum releases from the New York City Delaware Basin Reservoirs shall be in accordance with Table 3 (Schedule of Releases during Drought Operations). New Jersey’s maximum average monthly diversion from the Delaware River Basin via the Delaware and Raritan Canal shall be in accordance with Table 1, when said diversion shall not exceed a daily running average of 80 mgd commencing on the day such Drought Emergency becomes effective. Under all City Delaware Basin Reservoir combined storage conditions, New Jersey’s diversion on any day shall not exceed 120 million gallons. d.

New Jersey Diversion Offset Bank

There is hereby established a NJ Diversion Offset Bank, not to exceed 1.49 billion gallons (2,300 cfs-days) of water in the City Delaware Basin Reservoirs, for the purpose of offsetting the increased diversions by New Jersey as provided in Table 1 of this FFMP, during drought conditions (basinwide and/or lower basin). The increases are in increments, not to be exceeded on any day, as follows: 0 mgd during Normal conditions; up to 15 mgd during Drought Watch; up to 20 mgd during Drought Warning; and up to 15 mgd during Drought Emergency. The differences in New Jersey’s diversion, computed on the basis of Table 1 of the Good Faith Agreement, and the corresponding rates in Table 1 of this FFMP, establish the additional increments for New Jersey’s diversion as incorporated herein. This Diversion Offset Bank shall be created by use of Forecast Available Water from June 1 to August 31 as described in Section 5 of this Appendix and reserved for New Jersey to offset the increased diversion during drought periods (basinwide and/or lower basin). Water shall be accumulated in the Diversion Offset Bank (up to 25 cfs per day) and shall be excluded from the Forecast Available Water calculation. Once the NYC Reservoirs enter into drought watch, the combined storage of the City Delaware Reservoirs shall be computed as the actual storage volume minus the NJ Amelioration Bank and NJ Diversion Offset Bank volumes for purposes of determining storage zones. If the accumulated incremental increased diversions by New Jersey, at any time, exceed the available water in the Diversion Offset Bank, the IERQ water dedicated to the NJ diversion amelioration will be used in the same manner. If the accumulated incremental increased diversions by New Jersey exceed both the combined NJ Diversion Offset Bank and the IERQ water dedicated to NJ diversion amelioration, the Lower Basin Reservoirs in Pennsylvania will provide the additional water to offset New Jersey’s increased diversions. Releases from the NJ Diversion Offset Bank and the IERQ dedicated to the NJ diversion amelioration shall be at the direction of DRBC with prior notification to New Jersey, and will be implemented by the River Master. Releases from the Lower Basin Reservoirs for New Jersey’s diversion, if necessary, shall be at the direction of DRBC, in consultation with and at the request of New Jersey. Releases from the NJ Diversion Offset Bank, the IERQ dedicated to the NJ diversion amelioration, or the Lower Basin Reservoirs in Pennsylvania to offset New Jersey’s incremental increases in out-of-basin diversions, measured at Port Mercer, NJ shall be in accordance with timing procedures agreed upon by DRBC, New Jersey, and the River Master. No offsetting or accounting for offsetting is required for New Jersey’s increased diversions on any day when DRBC determines that no water is required to meet the current Trenton flow objective.

Appendix 2. Agreement For a Flexible Flow Management Program 91 FFMP2017 OPERATIONS PLAN The River Master will maintain the ongoing accounting for releases made from this bank and the st Diversion Amelioration Bank. At no time during the year commencing June 1 shall releases from the NJ Diversion Offset Bank exceed the balance of the bank. The bank will reset under st normal conditions on June 1 and begin accumulating water as defined in this section. If under st basin wide drought conditions on May 31 the balance of the NJ Diversion Offset Bank shall remain available for use until normal conditions resume. Upon return to normal conditions, the NJ Diversion Offset Bank will reset and begin accumulating water as described in this and Section 5. Figure 1 New York City Delaware System Usable Combined Storage (Cannonsville, Pepacton, and Neversink Reservoirs)

Combined System Storage Zones

110%

Combined Useable Reservoir Storage (percent)

100% 90% 80%

70% 60%

50% 40%

30%

20%

Storage Zone Descrip�ons L1 - Spill Mi�ga�on L2 - Normal L3 - Drought Watch L4 - Drought Warning L5 - Drought Emergency

10% 0% 1-Jun

1-Jul

1-Aug

1-Sep

1-Oct

1-Nov

1-Dec

1-Jan

1-Feb 1-Mar

1-Apr

1-May

92 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN Table 1 Interstate Operation Formula for Diversions and Flow Objectives NYC

Montague

Trenton

Diversion

Flow Objective

NYC Storage Condition

(mgd)

(cfs)

Normal (L1, L2)

800

100

1,750

3,000

Drought Watch (L3)

680

100

1,650

2,700

Drought Warning (L4)

560

1,550

2,700

Drought Emergency (L5)

520

1,100-1,650*

2,500-2,900*

Severe Drought

(to be negotiated depending upon conditions)

* Varies with time of year and location of salt front, in accordance with Table 2. _____________________________________________________________________

Table 2 Interstate Operation Formula for Adjusting Montague and Trenton Flow Objectives during Drought Emergency (L5) Operations

Flow objective, cubic feet per second at: Montague, NJ

Trenton, NJ***

7-day average location of Salt Front*,

Dec-

May-

Sept-

Dec-

May-

Sept-

River Mile**

Apr.

Aug.

Nov.

Apr.

Aug.

Nov.

Upstream of R.M. 92.5

1,600

1,650

2,700

2,900

Between R.M. 87.0 and R.M. 92.5

1,350

1,600

1,500

2,700

Between R.M. 82.9 and R.M. 87.0

1,350

1,600

1,500

2,500

Downstream of R.M. 82.9

1,100

2,500

* Defined as the 250 milligrams per liter isochlor in the Delaware Estuary. **Measured in statute miles along the navigation channel from the mouth of Delaware Bay. *** The Trenton Equivalent Flow Objective is achieved if the sum of flows observed at the USGS Trenton gaging station, releases in excess of conservation releases from Blue Marsh Reservoir, and an amount to account for water withdrawn above Trenton and returned below the gage is greater than the Trenton Flow Objective listed above.

Appendix 2. Agreement For a Flexible Flow Management Program 93 FFMP2017 OPERATIONS PLAN Table 3 Schedule of Releases (cfs) during Drought Operations Summer

Fall

Winter

Spring

Cannonsville

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

135

100

Summer

Fall

Winter

Spring

Pepacton

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

Summer

Fall

Winter

Spring

Neversink

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

Entry and Exit Criteria

Criteria for entry into and exit from the various stages of drought operations shall be in accordance with Section 2.5.3.E. of the Water Code. Normal (L2 or higher) level releases will be restored when combined storage in the City Delaware Basin Reservoirs reaches 25 billion gallons above the L3 curve in Figure 1 and remains at or above that level for 15 consecutive days.

94 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN f.

Balancing Adjustment

In order to conserve water, the River Master is requested to utilize a balancing adjustment, based upon procedures agreed upon by the Decree Parties, when calculating the releases to be directed to meet the Montague flow objectives in Tables 1 and 2. 5.

HABITAT PROTECTION PROGRAM a.

Applicability and Management Objectives

The overall management goal of the Habitat Protection Program (HPP) is to protect the coldwater fishery while maintaining aquatic community diversity, structure, and function through improved ecological flow releases. A series of four categorical protection levels for describing cold water ecosystem management objectives for waters downstream of the City Delaware Basin Reservoirs was developed by New York and Pennsylvania fishery managers and is shown on Plate 1. These protection levels apply in non-drought years and are defined as follows: Excellent:

Excellent year-round cold-water aquatic habitat protection. Summer water temperatures are routinely 68ºF or less and only very rarely exceed a daily maximum of 75ºF. Excellent protection level applies to the West Branch Delaware River from Cannonsville Reservoir to the junction with the East Branch Delaware River, the East Branch Delaware River from Pepacton Reservoir to the hamlet of East Branch, N.Y., and Neversink River from Neversink Reservoir to Bridgeville, N.Y.

Good:

River section provides cold water aquatic habitat and thermal protection and maintains opportunities for a cold-water fishery. Summer water temperatures will occasionally exceed a daily maximum of 75ºF for short periods and water temperatures greater than 68ºF occur more frequently than with the Excellent protection level. Elevated temperatures will occasionally be an issue. Good protection level applies to the Delaware River main stem from the junction of the West and East Branches to Lordville, N.Y. and the Neversink River from Bridgeville, N.Y. to the mouth of Eden Brook near Oakland Valley, N.Y.

Moderate:

River sections will experience adequate flow and some thermal protection for cold water species. Seasonal opportunities for a cold-water fishery will occur, but thermal benefits will diminish. Moderate protection level applies to the East Branch Delaware River from East Branch, N.Y. to the mouth of Corn Creek near Peas Eddy, N.Y., the Neversink River from the mouth of Eden Brook near Oakland Valley, N.Y. to the Sullivan/Orange County, N.Y. boundary, and the Delaware River main stem from Lordville, N.Y. to Hankins, N.Y.

Minimal:

River sections with this designation will experience adequate flow, but only limited thermal protection. The quality of the fishery will be generally seasonal and will vary from year to year. Flows should be adequate to allow trout to reach cold water refugia and to protect dwarf wedgemussel populations in the

Appendix 2. Agreement For a Flexible Flow Management Program 95 FFMP2017 OPERATIONS PLAN vicinity of Callicoon, N.Y. Minimal protection level applies to the East Branch Delaware River from the mouth of Corn Creek near Peas Eddy, N.Y. to the junction with the West Branch Delaware River, and the Delaware River main stem from Hankins, N.Y. to Callicoon, N.Y. The Decree Parties recognize that the degree of protection in waters downstream of the City Delaware Basin Reservoirs will vary according to annual fluctuations in precipitation and temperature, reservoir releases rates, distance from the locations of reservoir releases, and tributary influences. Requirements for protection of the federally endangered dwarf wedgemussel are currently under study and are poorly defined.

96 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN Plate 1 Extent and Protection Level of the Cold-Water Ecosystem

Appendix 2. Agreement For a Flexible Flow Management Program 97 FFMP2017 OPERATIONS PLAN b.

Controlled Releases for Habitat Protection Program

There is hereby established a Habitat Protection Program (HPP), which consists of conservation releases designed for the protection of the cold-water fishery below the City Delaware Basin Reservoirs. The HPP is designed to make enhanced releases, above the base releases given in Table 4a, when an assessment by New York City, using its Operations Support Tool (OST) as guidance, determines that additional water is available for releases and that any risk to the City’s water supply is at an acceptable level. The Base Releases table is designed for drought neutral minimum releases, i.e., no additional drought risk relative to DRBC Docket D-77-20 CP Revised (Rev. 1), which can be maintained under Normal conditions, independent of inflow or the City’s demand. The City is using OST, a state-of-the-art forecast-driven analysis and decision support tool that provides the City with probabilistic predictions of future system status. In addition to its principal objective of improving operational decision making in providing a reliable supply of high quality drinking water for 9 million people, OST also provides assurance that the actions taken to support downstream objectives, such as fish habitat, stream ecosystems, and better discharge mitigation, will not adversely impact water supply reliability. It allows the City to compare different sets of operating scenarios using real-time system information (e.g., reservoir levels, water quality, streamflows) and forecasts (e.g., streamflows, meteorological drivers) to evaluate the impacts on water supply reliability so that objective risk-based decisions can be made quickly and efficiently. Under this agreement the City will voluntarily make enhanced releases using the Forecast-based Available Water (FAW) as determined by an OST assessment and in accordance with Figures 1 and 2 and the appropriate FAW or the base releases shown in Table 4a. During periods when Table 4g is in effect, a 25 cfs credit towards the New Jersey Diversion offset Bank shall be included with the total NYC Reservoir releases. During periods when Table 4f is in effect, a 10 cfs credit towards the New Jersey Diversion offset Bank shall be included with the total NYC Reservoir releases. When the assessment indicates that no additional water is available, the City shall make releases in accordance with the currently sustainable base releases shown in Table 4a. The City is under no obligation to make enhanced releases beyond the base releases, when the risk to water supply, as determined by the City using its OST assessment, is unacceptable. The City will make available to the Decree Parties the inputs to the OST model, the outputs from the model, and the releases table selection guidelines, including the forecasted probabilistic inflows, the status of the City Delaware Reservoirs, and the operational assumptions applicable to OST-based decisions. OST assessments shall be performed as frequently as necessary to confirm confidence in the selected FAW table but generally not less than monthly. Prior to making a releases table change, the City will provide notification, along with a general description of the rationale of such change to the Decree Parties, the River Master, and DRBC. The City shall provide the OST Summary Data, described above through the River Master’s website. As shown in Tables 4a through 4g, each reservoir has a schedule of seasonal releases based on the quantity of combined reservoir usable storage, and the quantity of water available for the HPP.

98 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN Figure 2 New York City Delaware System Usable Individual Storage (Cannonsville, Pepacton, and Neversink Reservoirs)

Appendix 2. Agreement For a Flexible Flow Management Program 99 FFMP2017 OPERATIONS PLAN Table 4a Schedule of Releases (cfs) during Normal Conditions Base Releases with no Forecast based Available Water (FAW) Summer

Fall

Winter

Spring

Cannonsville

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

1500

L1-b

600

L1-c

215

200

105

185

190

180

160

Summer

Fall

Winter

Spring

Pepacton

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

700

L1-b

300

L1-c

120

110

100

Summer

Fall

Winter

Spring

Neversink

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

190

L1-b

150

110

L1-c

* Indicates storage zone not present at this time period; release is entry in cell below.

100 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN Table 4b Schedule of Releases (cfs) during Normal Conditions Summer

Fall

Winter

Spring

Cannonsville

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

1500

L1-b

600

L1-c

300

250

200

110

165

245

265

245

225

140

110

200

210

Summer

Fall

Winter

Spring

Pepacton

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

700

L1-b

300

L1-c

135

125

110

100

Summer

Fall

Winter

Spring

Neversink

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

190

L1-b

150

110

L1-c

100

* Indicates storage zone not present at this time period; release is entry in cell below.

Appendix 2. Agreement For a Flexible Flow Management Program 101 FFMP2017 OPERATIONS PLAN Table 4c Schedule of Releases (cfs) during Normal Conditions Summer

Fall

Winter

Spring

Cannonsville

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

1500

L1-b

600

L1-c

350

300

225

110

175

275

300

270

190

155

240

255

Summer

Fall

Winter

Spring

Pepacton

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

700

L1-b

300

L1-c

140

125

105

100

120

115

105

100

Summer

Fall

Winter

Spring

Neversink

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

190

L1-b

150

110

L1-c

105

* Indicates storage zone not present at this time period; release is entry in cell below.

102 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN Table 4d Schedule of Releases (cfs) during Normal Conditions Summer

Fall

Winter

Spring

Cannonsville

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

1500

L1-b

600

L1-c

400

325

275

140

245

305

345

360

315

245

105

205

280

305

Summer

Fall

Winter

Spring

Pepacton

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

700

L1-b

300

L1-c

150

125

115

120

130

125

115

105

110

Summer

Fall

Winter

Spring

Neversink

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

190

L1-b

150

110

L1-c

110

* Indicates storage zone not present at this time period; release is entry in cell below.

Appendix 2. Agreement For a Flexible Flow Management Program 103 FFMP2017 OPERATIONS PLAN Table 4e Schedule of Releases (cfs) during Normal Conditions Summer

Fall

Winter

Spring

Cannonsville

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

1500

L1-b

600

L1-c

450

375

335

150

285

350

385

415

360

295

120

255

320

355

Summer

Fall

Winter

Spring

Pepacton

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

700

L1-b

300

L1-c

155

140

125

120

140

135

125

105

110

120

Summer

Fall

Winter

Spring

Neversink

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

190

L1-b

150

110

L1-c

115

105

100

* Indicates storage zone not present at this time period; release is entry in cell below.

104 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN Table 4f Schedule of Releases (cfs) during Normal Conditions Summer

Fall

Winter

Spring

Cannonsville

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

1500

L1-b

600

L1-c

500

425

400

175

160

325

375

425

460

405

350

135

300

360

400

Summer

Fall

Winter

Spring

Pepacton

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

700

L1-b

300

L1-c

160

145

135

130

150

140

130

115

120

130

Summer

Fall

Winter

Spring

Neversink

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1 -

Sep 16 -

Oct 1 -

Dec 1 -

Apr 1 -

May 1 -

May 21 -

Storage Zone

15Jun

30Jun

31Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

190

L1-b

150

110

L1-c

120

105

100

105

110

* Indicates storage zone not present at this time period; release is entry in cell below.

Appendix 2. Agreement For a Flexible Flow Management Program 105 FFMP2017 OPERATIONS PLAN Table 4g Schedule of Releases (cfs) during Normal Conditions Summer Cannonsville

Fall

Winter

Spring

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1-

Sep 16 -

Oct 1 -

Dec 1-

Apr 1 -

May 1-

May 21 -

15-Jun

30-Jun

31-Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

1500

L1-b

600

L1-c

550

475

425

175

375

425

475

500

450

400

150

350

400

450

Storage Zone

Summer Pepacton

Fall

Winter

Spring

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1-

Sep 16 -

Oct 1 -

Dec 1-

Apr 1 -

May 1-

May 21 -

15-Jun

30-Jun

31-Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

700

L1-b

300

L1-c

170

160

145

100

145

160

150

140

125

140

Storage Zone

Summer Neversink

Fall

Winter

Spring

Jun 1 -

Jun 16 -

Jul 1 -

Sep 1-

Sep 16 -

Oct 1 -

Dec 1-

Apr 1 -

May 1-

May 21 -

15-Jun

30-Jun

31-Aug

15Sep

30Sep

30Nov

31Mar

30Apr

20May

31May

L1-a

190

L1-b

150

110

120

L1-c

125

115

100

115

100

Storage Zone

* Indicates storage zone not present at this time period; release is entry in cell below.

106 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN 6.

DISCHARGE MITIGATION PROGRAM To enhance flood mitigation provided by the City Delaware Basin Reservoirs, a Conditional Seasonal Storage Objective (CSSO) rule curve in Figure 2 will be established. Consistent with good practices for water supply reservoirs, and in order to ensure that sufficient resources are available during an extended dry period to support both lower basin and NYC needs, it is essential to ensure that the City Delaware Basin Reservoirs are filled on or around June 1st every year. To accomplish this, the CSSO (boundary between the L1-b and L1-c storage zones in Figure 2) must be limited and ramped. NYC shall endeavor, to the maximum extent possible without impacting water supply reliability, to maintain reservoir levels at the CSSO, thus creating a high probability of maintaining fifteen (15) percent void spaces each year between November 1 through the following February 1to help mitigate flooding events. In determining the releases needed to maintain the CSSO, the following parameters are considered in the OST evaluation: forecasted inflows over the next seven (7) days, FAW table releases in effect over the next seven (7) days, anticipated diversions over the next seven (7) days, including inflow from the snow water equivalent (snowmelt) as forecast by the National Weather Service’s (NWS) Hydrological Ensemble Forecasting System (HEFS), and the current usable reservoir storage. Based on any projected seven (7) day storage surplus, the City will calculate new release volumes, above the FAW table releases in effect, to progress toward the CSSO and allocate those volumes over the upcoming 7-day period, within the limitations of the release works for each reservoir. Discharge Mitigation Program releases are designed to help mitigate the effects of flooding immediately below the City Delaware Basin Reservoirs. When the combined reservoir usable storage in Figure 1 is in Zone L1, the spill mitigation zone, Figure 2 defines three zones of reservoir-specific storage (L1-a, L1-b and L1-c) relative to two rule curves for each reservoir. Tables 4a through 4g further define spill mitigation releases based on reservoir-specific storage when combined storage is in Zone L1. When combined usable reservoir storage is below Zone L1, reservoir-specific storage zones as defined in Figure 2 are not applicable, and the releases to be made, as set forth in the tables, are for conservation purposes only. The City shall make discharge mitigation releases from the City Delaware Basin Reservoirs in accordance with the following: i.

If combined reservoir usable storage is in Zone L1 in accordance with Figure 1, discharge mitigation releases shall be made based upon individual reservoir usable storage in accordance with Zones L1-a, L1-b and L1-c as provided in Figure 2 and Tables 4a through 4g. HEFS will explicitly model the amount and timing of snowmelt in reservoir inflow forecasts. By incorporating the most recent City snowpack survey data, as well as the City’s automated snowpack sensor network data and the NWS’s meteorological forecasts into a runoff model, HEFS will determine an up to date prediction of reservoir inflows from rainfall and snowmelt.

ii.

For the period April 16 through June 15, discharge mitigation releases shall be made in accordance with standard practices for water supply reliability, toward achieving the CSSO, at rates up to but not exceeding L1-a release rates as provided in Figure 2 and Tables 4a through 4g.

iii.

NYCDEP and the NYSDEC reservoir releases managers, upon mutual agreement, may transfer spills to bottom releases to the extent possible at any reservoir.

iv.

The current National Weather Service (NWS) flood stage for the West Branch

Appendix 2. Agreement For a Flexible Flow Management Program 107 FFMP2017 OPERATIONS PLAN Delaware River at Hale Eddy is 11 feet. Accordingly, Zone L1 discharge mitigation releases will not be made from Cannonsville Reservoir when the river stage for the West Branch Delaware River at Hale Eddy is above 9 feet, or is forecasted to be above 9 feet within 48 hours of planned discharge mitigation releases, and releases shall be made in accordance with Zone L2 through L5 as provided in Tables 4a through 4g. This guidance may be modified at any time upon unanimous consent by the Decree Parties, if additional information demonstrates that a different cautionary stage should be used to limit the discharge mitigation releases. v.

The current NWS flood stage for the East Branch Delaware River at Fishs Eddy is 13 feet. Accordingly, Zone L1 discharge mitigation releases will not be made from Pepacton Reservoir when the river stage for the East Branch Delaware River at Fishs Eddy is above 11 feet or is forecast to be above 11 feet within 48 hours of planned discharge mitigation releases, and releases shall be made in accordance with Zone L2 through L5 as provided in Tables 4a through 4g. This guidance may be modified at any time upon unanimous consent by the Decree Parties, if additional information demonstrates that a different cautionary stage should be used to limit the discharge mitigation releases.

vi.

The current NWS flood stage for the Neversink River at Bridgeville is 13 feet. Accordingly, Zone L1 discharge mitigation releases will not be made from Neversink Reservoir when the river stage for the Neversink River at Bridgeville is above 12 feet, or is forecast to be above 12 feet within 48 hours of planned discharge mitigation releases, and releases shall be made in accordance with Zone L2 through L5 as provided in Tables 4a through 4g. This guidance may be modified at any time upon unanimous consent by the Decree Parties, if additional information demonstrates that a different cautionary stage should be used to limit the discharge mitigation releases.

vii.

Discharge mitigation releases may be suspended from the respective reservoir if NYCDEP and NYSDEC, in consultation with the NWS, determine that ice conditions threaten flood prone areas of the West Branch Delaware River below Cannonsville Reservoir, East Branch Delaware River below Pepacton Reservoir, or Neversink River below Neversink Reservoir.

viii.

Discharge mitigation releases will be designed so that the combined discharge from each reservoir’s controlled release works and spillway does not exceed the maximum rate given in Table 5 below. Respective controlled releases will be reduced to L5 in Table 3.

ix.

To more naturally effect downward or upward transitions between discharge mitigation releases rates identified in Tables 4a through 4g, discharge mitigation releases rates may be ramped, in cooperation with NYSDEC, generally over a period of three days at Cannonsville and Pepacton Reservoirs, and two days at Neversink Reservoir.

Modifications to the program necessary to accommodate emergencies, maintenance and repair operations or short-term needs shall be undertaken pursuant to Section V of the Agreement.

108 Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017 FFMP2017 OPERATIONS PLAN Table 5 Maximum Combined Discharge Rates Reservoir

Maximum Combined Discharge Rate (cfs)

Neversink 3,400 Pepacton 2,400 Cannonsville 4,200 ________________________________________ 7.

SALINITY REPULSION New York City will provide releases to protect the lower basin water supply from salt water movement up the Delaware River in accordance with Table 2 of the Interstate Water Management Recommendations of the Parties to the U.S. Supreme Court Decree of 1954 to the Delaware River Basin Commission pursuant to Delaware River Basin Commission Resolution 7820 (Good Faith Agreement). As stipulated in the Good Faith Agreement and in accordance with Table 2, herein (Interstate Operation Formula for Adjusting Montague And Trenton Flow Objectives During Drought Emergency (L5) Operations), the City shall make releases to meet the Montague flow objectives according to the location of the salt front.

TEMPERATURE MONITORING AND REPORTING During the term of the current Agreement, NYSDEC shall monitor water temperatures within the stream reaches defined and categorized in Section 5. Monitoring will be conducted at a sufficient number of locations (to be determined by NYSDEC) to adequately characterize temperatures. At the end of the current Agreement, NYSDEC shall provide a compilation of the monitoring data with a brief statement of the findings to the Decree Parties.

TEMPORARY SUSPENSION OR MODIFICATION OF FFMP From time to time, the Decree Parties and DRBC may agree that upgrades to facilities, emergencies, maintenance and repair operations, short-term needs, or unanticipated effects of the FFMP may require temporary suspension or modification of one or more of the provisions herein. In considering such temporary suspensions or modifications, the Decree Parties and DRBC may estimate probabilities and risks associated with such temporary suspensions or modifications. Any resultant action taken, other than the temporary suspension or modification to the releases as provided below, shall require the unanimous approval of the Decree Parties. New York City shall provide reasonable advance notification to the Decree Parties, River Master and DRBC of any planned extended tunnel shutdowns from New York City’s Delaware System reservoirs and/or changes in releases due to emergencies, maintenance and repair operations, upgrades to existing facilities or the construction and integration of new infrastructure. New York City shall establish the scope of work and the schedule for the work and shall inform the Decree Parties and DRBC of such plans as early as practicable. For work involving a temporary suspension or modification due to new infrastructure or an upgrade to an existing facility, New York City shall provide the Decree Parties and DRBC with the releases modification strategy and project design materials at the sixty (60) percent design point to allow for review, comment and discussion. The Decree Parties shall make their best effort to reach unanimous approval for a modified release schedule as may be required for purposes of performing the work. In the absence of unanimous approval, New York City, acting in cooperation with the New York State

Appendix 2. Agreement For a Flexible Flow Management Program 109 FFMP2017 OPERATIONS PLAN Department of Environmental Conservation (NYSDEC), will make releases to the best of its ability for the duration of the work, provided, however, that releases shall be sufficient to meet the Montague flow objective in effect at the time. Modifications to releases not to exceed seven (7) consecutive days for purposes of maintenance or repair of immediate necessity, or to avoid unreasonable fluctuations in releases, shall not require Decree Party approval, but shall be done in cooperation with the NYSDEC, provided, however, that releases shall be sufficient to meet the Montague flow objective in effect at the time.

For more information about this report, contact: Delaware River Master, Office of the Delaware River Master, U.S. Geological Survey. Visit our website at: https://webapps.usgs.gov/odrm/ Publishing support provided by the Reston Publishing Service Center

Russell and others—Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017—OFR 2024–1022

ISSN 0196-1497 (print) ISSN 2331-1258 (online) https://doi.org/10.3133/ofr20241022

Report of the River Master of the Delaware River for the Period December 1, 2016–November 30, 2017

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