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Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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

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Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Open-File Report 2024–1010

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

Calendar for Report Year 2015 S 7 14 21 28

4 11 18 25

December 2014 T W T

8 15 22 29

9 16 23 30

10 17 24 31

11 18 25

12 19 26

13 20 27

5 12 19 26

January 2015 1 6 7 8 14 15 13 21 20 22 28 27 29

9 16 23

10 17 24 31

February 2015 1 8

2 9

3 10

4 11

5 12

6 13

7 14

15 22

16 23

17 24

18 25

19 26

20 27

21 28

1 8

2 9

March 2015 3 4 5 10 11 12

6 13

7 14

15 22 29

16 23 30

17 24 31

20 27

21 28

2 6

April 2015 3 1 2 7 8 9

1 5

15 22 29

19 26

7 14 21 28

1 8 15 22 29

2 9 16 23 30

1 5 12 19 26

4 11 18 25

5 12 19 26

6 13 20 27

2 6

July 2015 3 1 2 7 8 9

3 10

4 11

13 20 27

14 21 28

16 23 30

17 24 31

18 25

1 2

2 3

August 2015 3 1 2 4 5 6

1 7

1 8

9 16 23 30

10 17 24 31

11 18 25

13 20 27

14 21 28

15 22 29

September 2015 1 2 3 8 9 10 15 16 17 22 23 24 29 30

4 11 18 25

5 12 19 26

2 9 16 23 30

3 10 17 24 31

6 13

7 14

20 27

21 28

3 10 17 24

4 11

15 22 29

12 19 26

18 25

7 14 21

1 8 15 22 29

11 18 25

5 12 19 26

6 13 20 27

November 2015 3 4 5 10 11 12

6 13

7 14

17 24

20 27

21 28

1 3

2 4

May 2015 3 1 2 5 6 7

1 8

2 9

1 8

2 9

10 17 24 31

11 18 25

12 19 26

15 22 29

16 23 30

15 22 29

16 23 30

14 21 28

3 10 17 24

October 2015

14 21 28

13 20 27

16 23 30

13 20 27

12 19 26

18 25

June 2015 T W T

18 25

19 26

Report of the River Master of the Delaware River for the Period December 1, 2014– November 30, 2015 By Kendra L. Russell, William J. Andrews, Vincent J. DiFrenna, J. Michael Norris, and Robert R. Mason, Jr.

Open-File Report 2024–1010

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, 2014–November 30, 2015: U.S. Geological Survey Open-File Report 2024–1010, 96 p., https://doi.org/10.3133/ofr20241010. ISSN 0196-1497 (print) ISSN 2331-1258 (online) ISBN 978-1-4113-4550-8

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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 April 11, 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 62nd Annual Report of the River Master of the Delaware River for the 12-month period from December 1, 2014, to November 30, 2015. In this report, this period is referred to as the River Master “report year.” During the 2015 River Master report year, monthly precipitation in the upper Delaware River Basin ranged from 49 percent of the long-term average in May 2015 to 184 percent of the long-term average in June 2015. Precipitation from December to May, when reservoirs typically refill, was 14.23 inches. Precipitation was below normal in December, January, February, March, April, May, August, and November and above normal in the other 4 months. When the report year began on December 1, 2014, combined useable storage in the New York City reservoirs in the upper Delaware River Basin was 154.457 billion gallons or 57 percent of combined storage capacity. The reservoirs were at 94.9 percent of usable capacity on May 31, 2015. Combined storage remained high (above 80 percent combined capacity) through late August 2015. The combined usable storage was 193.239 billion gallons at the end of the report year on November 30, 2015. During the report year, operations in the basin were conducted as stipulated by the Decree and the Flexible Flow Management Program (FFMP). On July 13, 2015, the Delaware River Master Advisory Committee (Advisory Committee) met at the U.S. Geological Survey (USGS) New Jersey Water Science Center in Lawrenceville, New Jersey, to discuss the issues related to water use in the Delaware River Basin, safe yield, and Excess Release Quantity. The meeting adjourned early due to an emergency at Cannonsville Reservoir (where a major leakage was reported). 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

During the report year, the River Master and staff participated in many water-supply related meetings of the Delaware River Basin Commission (DRBC). The Deputy Delaware River Master met periodically with representatives of the Decree Parties as a member of the Decree Parties Work Group and the DRBC’s Regulated Flow Advisory Committee. In addition to the management of reservoir releases and streamflow in the upper Delaware River Basin, an issue of particular interest to the River Master was the impending expiration of the current FFMP on June 1, 2015. River Master operations were executed through the USGS Office of the Delaware River Master (ODRM) located at Milford, Pennsylvania. Marie Owens (Hynes), Deputy Delaware River Master, continued in charge of the office, assisted by hydrologist Vincent DiFrenna. During the report 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 New York City reservoirs to the Delaware River, diversions to the New York City water supply system, reservoir contents, the daily segregation of the flow of the Delaware River at the USGS Montague, New Jersey, gaging station, and diversions by 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 and monthly 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. New York City diverted 184.722 billion gallons from the Delaware River Basin and released 94.972 billion gallons from the Pepacton, Cannonsville, and Neversink Reservoirs to the Delaware River for conservation purposes during the report year. A total of 4.219 billion gallons was spilled from the Pepacton, Cannonsville, and Neversink Reservoirs. The ODRM directed releases from these reservoirs to the Delaware River that totaled 38.129 billion gallons. The second section of this report describes water quality at various monitoring sites on the Delaware River estuary. The section includes basic data on chemical properties and 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 Montague, New Jersey, were made as directed by the ODRM. Diversions by New York City from its reservoirs in the Delaware River Basin did not exceed the limit stipulated by the Decree. Diversions by 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 the PPL Corporation, the Talen Energy Corporation, and Eagle Creek Renewable Energy, LLC, in informing the ODRM of plans for power generation and providing data on the 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 using hydrologic data collected daily. Data for these records were collected and computed by the ODRM or were provided by the following agencies and utilities. Data for streamflow of the Delaware River at Montague, New Jersey, and other locations and tributaries in this report 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 the PPL Corporation (transferred to Talen Energy as of June 1, 2015). Data for Rio Reservoir were provided by Eagle Creek Renewable Energy, LLC. The contributions from these organizations are greatly appreciated. The National Weather Service offices in Binghamton, New York, and State College, Pennsylvania, provided quantitative precipitation forecasts and some precipitation data. Marie Owens (Hynes), Margaret Philips, and Amy McHugh, all of the USGS, assisted with and 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��2 Segregating Streamflow Components—Delaware River at Montague, New Jersey��2 Forecasting Streamflow—Delaware River at Montague, New Jersey��2 Hydrologic Conditions��4 Precipitation��4 Reservoir Storage��4 Operations��6 Diversions to New York City Water Supply��6 Diversions by New Jersey��6 Montague Flow Objective��7 Excess Release Quantity and Interim Excess Release Quantity��9 Tailwaters Habitat Protection and Discharge Mitigation Program��9 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��11 U.S. Geological Survey Continuous Water-Quality Monitoring Program��11 Delaware River Estuary Boat Run Monitoring Program��13 Water Quality During the 2015 Report Year��13 Streamflow��13 Water Temperature��13 Specific Conductance and Chloride��15 Dissolved Oxygen��15 Hydrogen-Ion Activity (pH)��16 Tables 1, 3–11, and 13–20��19 References Cited��61 Glossary��63 Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015��66 Appendix 2. Temporary Modification to the Drought Entry Criteria Under the Flexible Flow Management Program��95

viii

Figures 1. 2.

4. 5.

6. 7.

Map showing Delaware River Basin upstream from Wilmington, Delaware��3 Graph showing rule curves and actual contents for three New York City reservoirs—Cannonsville, Neversink, and Pepacton—in the Delaware River Basin from December 1, 2014, to November 30, 2015��5 Graphs showing flow components—uncontrolled runoff, powerplant reservoirs, and New York City reservoirs—for the Delaware River at Montague, New Jersey��8 Hydrographs of computed and forecasted uncontrolled runoff components, Delaware River at Montague, New Jersey, from July 7 to October 31, 2015��10 Graphs showing New York City-measured mean flow compared with computed mean flow records of U.S. Geological Survey (USGS) gaging stations downstream from their respective reservoirs��12 Map showing location of Delaware River Basin Commission (DRBC) water-quality monitoring sites on the Delaware River estuary��14 Bar chart showing monthly average water temperatures in 2015 and long-term mean monthly water temperatures from 1964 to 2015, for April through November, in the Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania��16 Graphs showing the daily mean and minimum daily mean dissolved-oxygen concentrations, in milligrams per liter, averaged for July–September, annually, at two sites on the Delaware River estuary, 1965–2015��17 Graphs showing percent distribution of quarter-hourly dissolved-oxygen concentrations, in milligrams per liter, at two sites on the Delaware River estuary, from July to September 2015��18

Tables 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.

Precipitation in the Delaware River Basin upstream of 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, 2015��20 Storage in Cannonsville Reservoir, New York, for report year ending November 30, 2015��21 Storage in Neversink Reservoir, New York, for report year ending November 30, 2015��22 Diversions to New York City water supply system for report year ending November 30, 2015��23 Consumption of water by New York City from 1950 to 2015��29 Diversions by New Jersey, daily mean discharge, Delaware and Raritan Canal at Port Mercer, New Jersey for the report year ending November 30, 2015��31 New York City reservoir release design data from December 1, 2014, to October 31, 2015��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, 2015��37

11.

12.

13. 14. 15. 16. 17. 18.

19.

20.

Daily mean discharge, Delaware River at Montague, New Jersey (U.S. Geological Survey site number 01438500), for report year ending November 30, 2015��52 Cumulative forecasted and actual release volumes from Lake Wallenpaupack, Rio Reservoir, and uncontrolled runoff from May 13 to 31, 2015, and from July 28 to October 31, 2015��10 Daily mean discharge, East Branch Delaware River at Downsville, New York, for report year ending November 30, 2015��53 Daily mean discharge, West Branch Delaware River at Stilesville, New York, for report year ending November 30, 2015��54 Daily mean discharge, Neversink River at Neversink, New York for report year ending November 30, 2012��55 Daily mean discharge, Delaware River at Trenton, New Jersey, for report year ending November 30, 2015��56 Daily maximum and minimum specific conductance, Delaware River at Reedy Island Jetty, Delaware, for report year ending November 30, 2015��57 Daily maximum and minimum chloride concentrations, Delaware River at Chester, Pennsylvania (U.S. Geological Survey site number 01477050), for report year ending November 30, 2015��58 Daily mean dissolved-oxygen concentrations, Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (U.S. Geological Survey site number 01467200), from April 1 to November 30, 2015��59 Daily mean dissolved-oxygen concentration, Delaware River at Chester, Pennsylvania, from April 1 to November 30, 2015��60

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)

square mile (mi2)

2.590

Area square kilometer (km2)

Volume million gallons (Mgal) billion gallons (Ggal) 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 follows: °F = (1.8 × °C) + 32.

Datums Vertical coordinate information is referenced to the Bureau of Water Supply 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 The term “cubic feet per second accumulated daily” is used as the descriptor for the volume measurement ([ft3/s]-d). Previous reports used the descriptor “cubic feet per second day” and “cubic feet per second for a day.” The units of measure are the same; the descriptor was changed to clarify that the measurement is one of volume rather than flow rate. 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 Del. Delaware DRBC

Delaware River Basin Commission

FFMP

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

ODRM

Office of the Delaware River Master

OST

Operational Support Tool

Pa. Pennsylvania 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, 2014–November 30, 2015 By Kendra L. Russell, William J. Andrews, Vincent J. DiFrenna, J. Michael Norris, and Robert R. Mason, Jr.

Executive Summary

Introduction

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 specific 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 62nd annual report of the River Master of the Delaware River. This report covers the 2015 River Master report year, which is the period from December 1, 2014, to November 30, 2015. During the report year, precipitation in the upper Delaware River Basin was 42.22 inches or 95 percent of the long-term average. The combined storage remained above 80 percent of the combined capacity until August 2015. The lowest combined storage of the report year was 57 percent of the total combined capacity on December 1, 2014. Delaware River Master operations during the year were conducted as stipulated by the Decree and the Flexible Flow Management Program. Diversions from the Delaware River Basin by New York City and New Jersey fully complied with the Decree. The 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, on 72 days during the report year. Interim Excess Release Quantity and conservation releases, designed to relieve thermal stress and protect the fishery and aquatic habitat in the tailwaters of the reservoirs, were also made during the report year. Water quality in the Delaware River estuary between the streamgages at Trenton, New Jersey, and Reedy Island Jetty, Delaware, was monitored at several locations. Data on water temperature, specific conductance, dissolved oxygen, and pH were collected continuously by electronic instruments at four sites.

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 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 are to 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, 2014, to November 30, 2015—the 2015 River Master report year— hereafter referred to as the “report year.” This report also presents information on the quality of water 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 (appendix 1). The 2014 FFMP and 2015 FFMP were in effect during the 2015 River Master report year: “The current FFMP is also an extension of the June 1, 2011, Agreement and incorporates the edits from the previous three extensions of the 2011 Agreement with no additional program modifications other than dates. This Agreement, the 2015 FFMP, shall be effective from June 1, 2015, to May 31, 2016.” (appendix 1; also available at https://webapps.usgs.gov/odrm/documents/ffmp/FFMP_2015_ Agreement1.pdf). During this period, an additional agreement was signed to temporarily modify storage calculations related to a drought watch. As part of that agreement, one-half of the snow-water-equivalent was added to the actual combined storage in the New York City reservoirs to determine when storage conditions were assessed to enter zone L3 from

2 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 March 13 through April 15, 2015 (appendix 2; also available at https://webapps.usgs.gov/odrm/documents/ffmp/2015_ Temporary_Modification.pdf). Some hydrologic data presented in this report are streamflow and water quality records for U.S. Geological Survey (USGS) water-quality streamgages. The USGS collected and computed these records 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 streamgages 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 streamflow components form the basic operational record used by the ODRM to carry out specific responsibilities related to the Montague flow objective. The operational record has two parts: (1) segregating the streamflow components of the current daily mean discharge at the USGS streamgage on the Delaware River at Montague, New Jersey (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 is used to determine whether the ODRM directs New York City reservoirs to release water to maintain, at a minimum, the Montague flow objective at the USGS streamgage at Montague, N.J., which is defined in table 1 of appendix 1.

Segregating Streamflow Components— Delaware River at Montague, New Jersey The segregation of streamflow at the Montague site involves determining the flow components, including releases from the New York City reservoirs, releases from Lake Wallenpaupack and Rio Reservoir for generation of hydroelectric power, and uncontrolled runoff. For the segregation of components of daily mean flow at the Montague site, the following data are used: 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 Montague site is required. The various traveltimes are used to determine the appropriate time-delayed flow contributions from the previously noted sources. The time-adjusted controlled flows of the above 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. Traveltimes were computed from 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 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 over several days and releases were not directed to meet the Montague flow objective during periods of ice, no adjustments were made to compensate for increased traveltimes during these periods of 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 2015 report year: Pepacton Reservoir, 60; Cannonsville Reservoir, 48; Neversink Reservoir, 33; Lake Wallenpaupack, 16; and Rio Reservoir, 8.

Forecasting Streamflow—Delaware River at Montague, New Jersey The releases from New York City’s reservoirs necessary to meet 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 PPL Corporation 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, demand for power outside the local service area can unexpectedly affect generation schedules. Consequently, at times, the actual use of water for power generation differs considerably from the forecasts used in the design of reservoir releases.

Method to Determine Directed Releases From New York City Reservoirs 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 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, 2014–November 30, 2015 For computational purposes during periods of low flow, estimates of uncontrolled runoff at the Montague site were treated as having 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 was used to forecast the uncontrolled portion of flow at Montague, N.J., 3 days in advance. Forecasted runoff was determined from data provided by the National Weather Service office in Binghamton, New York (N.Y.), which included 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 forecast releases from hydroelectric powerplant 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 is made up by using releases from New York City’s reservoirs, as directed by the ODRM. Based on the previous day’s provisional data, a balancing adjustment is applied to the following day’s release design. 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 cubic feet per second (ft3/s) magnitude. The balancing adjustment calls for more water to be released when previous directed releases (or 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 appreciable changes after a release was directed, the release required from New York City’s reservoirs was recomputed based on the updated forecasts. Commonly, this procedure resulted in a reduced release requirement for New York City reservoirs on that day. Only final values for releases from New York City reservoirs are presented in this report.

Hydrologic Conditions Precipitation The sum of average monthly precipitation in the Delaware River Basin upstream from Montague, N.J., was 42.22 inches (in.) during the 2015 report year and was 95 percent of the long-term (74-year) average (table 1, in back of report). Monthly precipitation ranged from 49 percent of the long-term average in May 2015 to 184 percent of the long-term average in June 2015 (table 1). Precipitation data for the 2015 report year were computed from records from 10 geographically distributed stations operated by the National Weather Service, the New York City Department of Environmental Protection’s (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 in 2014–15, total precipitation was 14.23 in., which is about 69 percent of the 74-year long-term average. During the June–November period, total precipitation was 27.99 in., which is 117 percent of the 74-year long-term average.

Reservoir Storage Table 2 summarizes the “point of maximum depletion” and other pertinent levels and the contents of the Pepacton, Cannonsville, and Neversink Reservoirs. The NYCDEP provided this information. 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 the combined storage during the report year is shown in figure 2. On December 1, 2014, combined useable storage in the three reservoirs was 154.457 billion gallons or 57 percent of combined capacity. From December to May, the inflow to the New York City reservoirs typically exceeds the outflow, and, consequently, storage increases. Combined storage increased during the report year, and the reservoirs were at about 94.9 percent of usable capacity on May 31, 2015. Combined storage remained high (above 80 percent of combined capacity) until August 2015. The lowest combined storage was 154.457 billion gallons (57 percent) on December 1, 2014. The three reservoirs spilled a total of 4.219 billion gallons when reservoirs reached maximum capacity during the year. The Pepacton Reservoir spilled from June 30, 2015, to July 3, 2015. The Cannonsville Reservoir spilled during the following periods: April 24–May 2, 2015, and July 1–7, 2015. The Neversink Reservoir spilled from June 27 to July 3, 2015. Combined storage reached a maximum for the report year on July 3, 2015, at 273.215 billion gallons. The reservoirs’ storage decreased from this point and the combined storage was 193.239 billion gallons or 71.3 percent of combined capacity on November 30, 2015.

Hydrologic Conditions 5 Table 2. Elevation and capacities of structures of the Pepacton, Cannonsville, and Neversink Reservoirs. [ft, foot; Mgal, million gallons; NA, not available; —, not applicable]

Pepacton Reservoir

Level

Cannonsville Reservoir

Neversink Reservoir

Elevation (ft)

Volume (Mgal)

Elevation (ft)

Volume (Mgal)

Elevation (ft)

1,280

—

1,150

—

1,440

—

Point of maximum depletion

1,152

1140,190

1,040

195,706

1,319

134,941

Sill of diversion tunnel

1,143

23,511

31,035

21,020

1,314

2525

1,126.50

44,200

1,020.5

41,564

1,314

—

1,800

—

1,680

Full pool or spillway crest

Sill of river outlet tunnel Dead storage

328

1Quantity stored between full pool or spillway crest and point of maximum depletion. 2Quantity stored between point of maximum depletion and sill of diversion tunnel. 3Elevation of mouth of inlet channel of diversion works. 4Quantity stored between sill of diversion tunnel and sill of river outlet tunnel.

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

2014

Jan. 20

Mar. 11

Apr. 30

June 19

Aug. 8

Sept. 27

Nov. 16

2015

Figure 2. Graph showing rule curves and actual contents for three New York City reservoirs— Cannonsville, Neversink, and Pepacton—in the Delaware River Basin from December 1, 2014, to November 30, 2015. The 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 releases” definition in the “Glossary” section.

Volume (Mgal)

6 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Operations Operations for December 1, 2014–November 30, 2015, were conducted as described in the FFMP (revised, effective June 1, 2014, and continued for a second year, effective June 1, 2015). The allowable diversion to New York City was 800 million gallons per day (Mgal/d) throughout the year. The Montague flow objective was 1,750 ft3/s. The allowable diversion to New Jersey was 100 Mgal/d. Conservation releases from the New York City reservoirs were made at the rates shown in 2014 FFMP tables 4a–g (https://webapps.usgs.gov/odrm/ffmp/FFMP_2014_ Agreement.pdf) and the June 1, 2015, FFMP (appendix 1), including table 4e of both FFMPs in December, table 4d in mid-January, table 4a in late January, table 4f in mid-February, table 4g in late February, table 4a in early March–May, table 4b in early June, table 4e in mid-June, tables 4f and 4g in late June–August, table 4g in September, and tables 4f and 4g in October–November 2015 (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. 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 the City’s calibrated instruments, which are connected to Venturi meters installed in the tunnel conduits. The measured flows were transmitted electronically on a 15-second interval to New York City computers, and 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 beginning June 1, 2014, computed as stipulated by the Decree, is also shown in table 6. A total of 184.722 billion gallons of water were diverted to the New York City water supply system during the report year with an average of 506 Mgal/d, which is below the maximum

diversion rate. The maximum daily diversion from a single reservoir was 501 million gallons (Mgal) on June 27 and 28, 2015, from the Pepacton Reservoir through the East Delaware Tunnel. The maximum daily combined diversion from all three reservoirs was 978 Mgal on January 26, 2015. Diversions by New York City did not exceed the limits stipulated by the Decree and the FFMP. 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 Pepacton Reservoir to Rondout Reservoir. The hydroelectric powerplant at the downstream end of the East Delaware Tunnel operated for most days of the report year. When the powerplant was not in operation, water leaked through the wicket gates that was not recorded by 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 98 days during the 2015 report year, the estimated quantity of unmeasured leakage (diverted but not recorded) was about 0.8 billion gallons. The West Delaware Tunnel is used to divert water from the Cannonsville Reservoir to the Rondout Reservoir. Inspections of the channel below the outlet, when the valves were closed, 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 the Neversink Tunnel. When the powerplant is not operating and the main valve on the diversion tunnel is open, leakage develops 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). The leakage is included in the recorded flow when the powerplant is operating. No leakage occurs when the main valve on the tunnel is closed. During the 2015 report year, the powerplant operated part of the day on most days and was not operated for the equivalent of 225 days. About 2.4 billion gallons of water were diverted but not recorded, according to the leakage rate noted previously (16.2 ft3/s [10.5 Mgal/d]) and powerplant records.

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 FFMP, New Jersey diversions shall not

Operations 7 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 warning period, diversions shall not exceed 85 Mgal/d as a running average. The USGS streamgage on the Delaware and Raritan Canal at Port Mercer, N.J. (USGS 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 average monthly diversion was 97 Mgal/d during November 2015 (table 8, in back of report) (USGS, 2019e). The maximum daily mean diversion was 111 Mgal/d on January 24, 2015 (table 8). Diversions by New Jersey 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 power reservoirs, estimated uncontrolled runoff including conservation releases from the Rio Reservoir, and forecasted increase 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 flow objective at the Montague site, then the deficiency is made up by using 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 the segregation of the various components contributing to the flow of the Delaware River at the Montague site. 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, 2014, to May 12, 2015, and no releases were directed. The observed daily mean discharge at the Montague site was greater than the applicable flow objective (1,750 ft3/s) on all days except for 1 day in May, 8 days in September, and 3 days in October (table 11, in back of report) (USGS, 2019d). The forecasted flow at the Montague site, exclusive of water released from the New York City reservoirs, was less than the flow objective on 73 days between May 13, 2015, and October 30, 2015, and directed releases were required (table 9). For 11 days, from May 15, 2015, to October 24, 2015, the observed flow at the Montague site was less than the flow objective (table 11). Of those observed daily flows, 10 were within 10 percent of the flow objective, whereas the daily mean flow on September 12, 2015, was 1,546 ft3/s, which is 88.3 percent of the flow objective (table 11). The components of total flow observed at the Montague site from May 15 to 30, 2015, and from July 28 to October 27, 2015, are shown in figure 3. The flow is segregated into the portion derived from the New York City reservoirs, the portion contributed by the power reservoirs, and the uncontrolled runoff from the drainage area below the reservoirs. As described previously, the uncontrolled runoff was computed as the residual of observed flow minus releases and was subject to errors in observations, transit times, and routings of the flow components. The conservation release from Rio Reservoir is included in the uncontrolled runoff component. The effect of these uncertainties is incorporated into the computation of uncontrolled runoff.

8 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

4,000

A EXPLANATION Uncontrolled runoff

3,500

Powerplant reservoirs New York City reservoirs

3,000

2,500

2,000

Montague flow objective

1,500

Discharge, in cubic foot per second

1,000

500

May

2015 4,000

B EXPLANATION Uncontrolled runoff

3,500

Powerplant reservoirs New York City reservoirs

3,000

2,500

2,000

Montague flow objective

1,500

1,000

500

July

August

September

2015

October

Figure 3. Graphs showing flow components—uncontrolled runoff, powerplant reservoirs, and New York City reservoirs—for the Delaware River at Montague, New Jersey (A) from May 15 to 30, 2015, and (B) from July 28 to October 31, 2015. The Montague flow objective is also shown.

Operations 9

Excess Release Quantity and Interim Excess Release Quantity

Tailwaters Habitat Protection and Discharge Mitigation Program

Per sections 4b and c of the 2015 FFMP (appendix 1), the Excess Release Quantity supports the Interim Excess Release Quantity (IERQ). The IERQ is 10.0 billion gallons (15,468 cubic feet per second accumulated daily ([ft3/s]-d).1 The 2015 FFMP specifies that 3.91 billion gallons (6,045 [ft3/s]-d) of the IERQ is incorporated into the releases tables to enhance base releases from New York City’s Delaware River Basin reservoirs. The remaining IERQ balance of 6.09 billion gallons (9,423 [ft3/s]-d) is reserved and may be used for additional releases to meet the Trenton equivalent flow objective or establish an Extraordinary Needs Bank as provided for in section 4d of the 2015 FFMP (appendix 1). Per section 4c of the 2015 FFMP, upon request by the “Lower Basin States" or the Delaware River Basin Commission (DRBC), New York City is required to release water in sufficient quantities from the remaining IERQ balance to maintain a flow in the Delaware River at Trenton, N.J. (USGS site number 01463500), of 3,000 ft3/s during basinwide normal conditions from June 15 through March 15 (known as the seasonal period). The maximum amount of water required for release from the remaining IERQ in any seasonal period is 70 billion gallons. New York City is required to make releases from the IERQ until May 31, 2016, or until the aggregate quantity of the IERQ is exhausted, whichever occurs first. As described in section 4d of the 2015 FFMP (appendix 1), 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 bank all or a portion of the IERQ remaining in an IERQ Extraordinary Needs Bank that can provide for such extraordinary water needs. Banked quantities are deducted from the IERQ, and unused Extraordinary Needs Bank water is returned to the IERQ. In 2015, 100 (ft3/s)-d of IERQ water was requested on September 17, to be released for September 20; and on September 18, to be released for September 21, to maintain flows at the Trenton site (table 10). The request for September 21was cancelled, and that water was not released. The unused portion of the IERQ Extraordinary Needs Bank was restored to the annual IERQ balance to maintain the flow target at the Trenton site.

The FFMP established a Tailwaters Habitat Protection and Discharge Mitigation Program, 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 water spilling from the full Delaware River Basin reservoirs. Controlled releases were made from the New York City Delaware River Basin reservoirs. From December 1, 2014, to November 30, 2015, 94.972 billion gallons was released from the New York City Delaware River Basin reservoirs under the Tailwaters Habitat Protection and Discharge Mitigation Program.

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

Analysis of Forecasts Forecasts of streamflow at the Montague site, based on anticipated contributions from the flow components described previously but excluding releases from the New York City reservoirs, differed from the observed flow on most days. Occasionally, variations in the components were partially compensating, and observed flows compared favorably with forecasted flows. The forecasted flow of the Delaware River at Montague, N.J., exclusive of releases from the New York City reservoirs, was less than the flow objective on 7 days in the second half of May and on most days from late July through late October 2015 (table 9), as indicated by directed releases being made. Table 12 compares forecasted and actual flow from hydroelectric powerplant releases and uncontrolled runoff from May 13 to 31 and from July 28 to October 31, 2015. Table 12. Cumulative forecasted and actual release volumes from Lake Wallenpaupack, Rio Reservoir, and uncontrolled runoff from May 13 to 31, 2015, and from July 28 to October 31, 2015. [(ft3/s)-d, cubic foot per second for a day]

1In this report, the descriptor “cubic feet per second accumulated daily” is

used to explain the measure [(ft3/s)-d]. See the “Supplemental Information” section for clarification.

Releases and runoff

Forecasted volume ([ft3/s]-d)

Actual volume ([ft3/s]-d)

Lake Wallenpaupack

16,562

17,738

Rio Reservoir

3,403

5,592

148,774

163,412

Runoff from uncontrolled area

10 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 For the May 13–31, and July 28–October 31, 2015, periods shown in table 12, actual releases from Lake Wallenpaupack and Rio Reservoir averaged 7.1 and 64 percent more than the forecasted releases, respectively. Powerplant forecasted volumes were calculated using columns 1 and 2 in table 9; powerplant actual releases were calculated using columns 5 and 6 in table 10. Observed runoff (column 10 of table 10) from the uncontrolled area was about 10 percent more than forecasted runoff (columns 3 + 4 in table 9). Forecasted and actual releases from Lake Wallenpaupack and Rio Reservoir can differ considerably on any given day. The differences between actual and forecasted daily releases from May 13 to 31, 2015, and July 28 to October 31, 2015, are as follows: daily releases at Lake Wallenpaupack varied by 230 ft3/s less than forecasted releases to 292 ft3/s greater than forecasted releases, and daily releases at Rio Reservoir varied by 124 ft3/s less than forecasted releases to 230 ft3/s greater than forecasted releases. Based on measured streamflow at the Montague site, total directed releases from the New York City reservoirs during the report year (column 9 of table 9) were about 6.0 percent more than required for exact forecasting (column 11 of table 9). A comparison of forecasted and computed runoff hydrographs from the uncontrolled area (fig. 4) indicate 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 forecasting 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 for 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. (USGS site number 01417000; fig. 1), is 0.5 miles (mi) downstream from Downsville Dam. Discharge measured at this site includes releases from the Pepacton Reservoir and a small amount of seepage and any runoff that enters the channel between the dam and the site. The drainage area is 371 mi2 at the dam and 372 mi2 at the site. The streamgage records are rated “good,” which means that about 95 percent of the measured daily mean discharges are within 10 percent of the actual discharge.

6,000

EXPLANATION Computed uncontrolled runoff Forecasted uncontrolled runoff

Discharge, in cubic feet per second

5,000

4,000

3,000

2,000

1,000

July

August

2015

September

October

Figure 4. Hydrographs of computed and forecasted uncontrolled runoff components, Delaware River at Montague, New Jersey, from July 7 to October 31, 2015. Discharge is shown in cubic feet per second.

Quality of Water in the Delaware River Estuary 11 Figure 5A shows the measured flow from Pepacton Reservoir, including spillway, conservation, and directed releases, as reported by New York City, compared with the records for the USGS streamgage on East Branch Delaware River at Downsville, N.Y. (table 13, in back of report), from December 1, 2014, to November 30, 2015 (USGS, 2019a). The average difference is 5.9 percent, and 95 percent of the daily differences between the streamgage readings and New York City records are less than 14 percent. Greater differences rarely occur and can be due to rainfall. The instruments connected to the 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. (USGS site number 01425000; fig. 1), is 1.4 mi downstream from the Cannonsville Dam. Discharge measured at this site includes releases from the Cannonsville Reservoir and runoff from the 2 mi2 of drainage area between the dam and the site. The drainage area is 454 mi2 at the dam and 456 mi2 at the site. 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 site and seepage near the base of the dam. Figure 5B shows releases from 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. (site number 01425000) (table 14, in back of report), from December 1, 2014, to November 30, 2015 (USGS, 2019b). The mean difference is 10.3 percent; 95 percent of the daily differences between the streamgage readings and New York City records are less than 31.4 percent. The greatest differences between the measured flows are primarily at lower flow rates. The USGS streamgage on Neversink River at Neversink, N.Y. (site number 01436000), is 1,650 feet (ft) downstream from Neversink Dam (fig. 1). Discharge measured at this site includes releases from the Neversink Reservoir and, during storms, a small amount of runoff that originates between the dam and the site. The drainage area is 92.5 mi2 at the dam and 92.6 mi2 at the site. The streamgage records are rated “good,” which means that about 95 percent of the measured daily mean discharges are within 10 percent of the actual discharge. Figure 5C shows releases from Neversink Reservoir, including spillway, conservation, and directed releases, as 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), from December 1, 2014, to November 30, 2015 (USGS, 2019c). The mean difference between the released flow and measured flow is 2.9 percent, and 95 percent of the daily differences between the streamgage readings and New York City records are less than 7 percent.

Delaware River at Montague, New Jersey The ODRM’s operations record for the Delaware River at Montague, N.J., site (table 10) showed 2 percent more 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 ice-affected periods and the summer vegetation growth season.

Conformance of Operations Under the Amended Decree of the Supreme Court of the United States Entered June 7, 1954 From December 1, 2014, to November 30, 2015, operations of the ODRM were conducted as stipulated by the Decree and the FFMP. Diversions from the Delaware River Basin to the New York City water supply system did not exceed those authorized by the Decree and the FFMP. New York City released water from its reservoirs at rates directed by the ODRM to meet the applicable Montague flow objective. 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 the limits stipulated by the Decree. New Jersey complied fully with all directives and requests of the ODRM. The IERQ was used in accordance with the FFMP and agreements completed throughout the report year.

Quality of Water in the Delaware River Estuary This section describes water-quality monitoring programs for the Delaware River estuary during the 2015 report year. Selected data are presented, and water-quality conditions are summarized.

Water-Quality Monitoring Programs U.S. Geological Survey Continuous Water-Quality Monitoring Program 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 the streamgages at Trenton, N.J., and Reedy Island Jetty, Delaware (Del.) (fig. 6).

12 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 800

700 y = 0.9999x − 0.3477 R2 = 0.9887

600 500 400 300 200

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

100 0

3,000

100

200

300

400

500

600

700

800

2,500

2,000 y = 0.9572x + 5.138 R2 = 0.9907

1,500

1,000

500

700

500

1,000

1,500

2,000

2,500

3,000

600

700

600 500 400 y = 1.1418x − 8.4915 R2 = 0.9294

300 200 100 0

100

200

300

400

500

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

Figure 5. Graphs showing New York City-measured mean flow compared with computed mean flow records of U.S. Geological Survey (USGS) gaging stations downstream from their respective reservoirs: (A) East Branch Delaware River at Downsville, New York (N.Y.) (USGS site number 01417000), downstream from Pepacton Reservoir (data from USGS, 2019a); (B) West Branch Delaware River at Stilesville, N.Y. (USGS site number 01425000), downstream from Cannonsville Reservoir (data from USGS, 2019b); and (C) Neversink River at Neversink, N.Y. (USGS site number 01436000), downstream from Neversink Reservoir, December 1, 2014– November 30, 2015 (data from USGS, 2019c).

Quality of Water in the Delaware River Estuary 13 Continuous water temperature, specific conductance, dissolved oxygen, and pH data were collected at four sites: Delaware River at Trenton, N.J. (USGS site number 01463500); Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (Pa.) (USGS site number 01467200); Delaware River at Chester, Pa. (USGS site number 01477050); and Delaware River at Reedy Island Jetty, Del. (USGS 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-monitor data are processed and stored in the USGS National Water Information System database (NWIS; https://waterdata.usgs.gov/nwis). Selected monitoring data from the 2015 report year are included in this section of the report. For this report, USGS site number 01467200 is referred to as “Delaware River at Benjamin Franklin Bridge at Philadelphia, Pa.,” because that was the gage name during the report period from December 1, 2014, to November 30, 2015. The gage was moved 150 ft upstream and renamed “Delaware River at Penns Landing, Philadelphia, Pa.,” in January 2020. The updated name is used in the “References Cited” section to refer to the data as listed on NWIS web at the time of publication.

Delaware River Estuary Boat Run Monitoring Program Each year, the DBRC contracts with the Delaware Department of Natural Resources and Environmental Control to collect water samples at 22 sites on the Delaware River estuary (fig. 6; sites A–N, P–W) (DRBC, 2022). Samples are collected once a month from April to October. The goals of this program are to provide accurate, precise, and defensible estimates of the surface-water quality of the Delaware River estuary and allow for an assessment of compliance with waterquality criteria. Sample analysis includes routine and bacterial parameters, nutrients, heavy metals, chlorophyll-a, dissolved silica, and volatile organics. Water-quality data for these DBRC sampling sites are not presented in this report but are accessible from the DRBC Delaware Estuary Water Quality (Boat Run) Explorer (https://www.nj.gov/drbc/programs/ quality/boat-run_explorer-app.html).

Water Quality During the 2015 Report Year Streamflow Streamflow has a major effect on the water quality of the Delaware River estuary. Large freshwater inflows commonly result in improved water quality by limiting the upstream movement of seawater and reducing the concentration of dissolved substances. High inflows help maintain 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 can result in excessive algae levels. Streamflow from the Delaware River Basin upstream from the Trenton, N.J., site is the primary source of freshwater inflow to the Delaware River estuary. During the report year, monthly average streamflow measured at the Delaware River at Trenton, N.J., streamgage (USGS site number 01463500) was highest during April 2015 (19,563 ft3/s) and lowest during September 2015 (4,152 ft3/s; table 16, in back of report). Long-term monthly mean streamflow was computed for October 1912 through November 2014 (USGS, 2019f). Monthly mean streamflows were less than the long-term mean monthly streamflows from December 2014 through May 2015 and from August through November 2015. The greatest percentage of flow deficiency was in February 2015, when the monthly mean streamflow was 31 percent of the long-term mean monthly flow. The highest daily mean streamflow during the report year was 39,800 ft3/s on July 2, 2015, and the lowest was 3,090 ft3/s on October 25, 2015 (table 16).

Water Temperature Water temperature has an important influence on water quality, as it affects various physical, chemical, and biological properties of water (USGS, 2020c). Generally, increases in water temperature have detrimental effects on water quality by decreasing the saturation level of dissolved oxygen and increasing the biological activity 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 monitoring data for the Benjamin Franklin Bridge, Philadelphia, Pa. (USGS site number 01467200), were collected almost continuously from April to November 2015. The procedures used to create figure 7 in this report were started with the 2011 report (DiFrenna and others, 2020) and are described here. The available long-term average daily temperature data were retrieved from the USGS NWIS database for April–November; the average value was computed for each month. Long-term average water temperatures were computed using data from 1964 to 2015 (fig. 7). In May, June, August, September, and November 2015, the monthly average temperatures were greater than the long-term mean monthly temperature (fig. 7). Monthly average temperatures were less than the respective long-term average in April, July, and October 2015 (fig. 7). The maximum daily mean water temperature of 27.3 degrees Celsius was recorded on July 31, and on August 1 and 2, 2015 (USGS, 2020d).

14 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 75°30'

75°00'

wa ela

er Riv

PENNSYLVANIA

C D

y hu 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 Delaware River Basin Commission (DRBC) water-quality monitoring sites on the Delaware River estuary. Modified from DRBC (2022). U.S. Geological Survey streamgaging sites (1–4) and DRBC sampling sites (A–N, P–W) are listed.

Quality of Water in the Delaware River Estuary 15

Specific Conductance and Chloride

Dissolved Oxygen

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. 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 are essential concerns 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 streamgage at Reedy Island Jetty, Del. (USGS site number 01482800). Chloride concentrations at Chester, Pa. (USGS site number 01477050), were measured by Kimberly-Clark Chester Operations. The Delaware River Basin Commission provided those data, which are not derived from specific conductance data. At the Reedy Island Jetty site, the greatest daily maximum specific conductance was 25,200 microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C) on February 18, 2015 (table 17, in back of report) (USGS, 2020h). The daily maximum specific conductance during the report year exceeded 3,780 µS/cm at 25 °C on approximately 99 percent of the 365 days with measured specific conductance values in the 2015 report year. The lowest daily minimum specific conductance was 721 µS/cm at 25 °C on April 24, 2015. The daily minimum specific conductance exceeded 3,780 µS/cm at 25 °C on 79 percent of the 365 days with measured specific conductance values in the 2015 report year. The data measured by Kimberly-Clark Chester Operations at Chester, Pa., indicates the greatest daily maximum chloride concentration was 322 mg/L on October 28, 2015 (table 18, in back of report). During the report year, daily maximum concentrations exceeded 50 mg/L on about 79 percent of the 364 days on which measurements were taken. The lowest daily minimum chloride concentration was 36 mg/L on July 16 and 17, 2015. Daily minimum concentrations exceeded 50 mg/L on about 66 percent of the reported days, including from December 1 to 15, 2014, from mid-January to early April 2015, from mid-May to mid-June 2015, and from late August through the end of November 2015 (table 18).

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 dissolvedoxygen concentrations because of increasing biological oxygen demand by aerobic bacteria in the water. For these sites, the daily mean and minimum daily mean dissolvedoxygen concentrations for the period of July–September during the 1965–2015 report years are shown in figure 8. Although dissolved-oxygen concentrations increased considerably over this 51-year period, mean concentrations can vary from year to year. Due to technological changes and other factors, the process used to calculate mean dissolved-oxygen concentrations and the associated data values has changed over time. The procedures used to create figure 8 of this report were started for the 2009–10 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 the daily values were computed over that 3-month period for each report year. Dissolved-oxygen concentrations in the Delaware River estuary are usually highest 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 4.5 mg/L on September 13, 2015 (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 June 1, 2015, and from October 1 through November 30, 2015. At the Chester site, the lowest recorded daily mean dissolved-oxygen concentration was 4.7 mg/L on July 22, 2015 (table 20, in back of report) (USGS, 2020f). Histograms of quarter-hourly dissolved-oxygen concentrations during the critical summer period (from July 1 through September 30, 2015) at the Benjamin Franklin Bridge and Chester sites are presented in figure 9. During the 2015 critical summer period, quarter-hourly dissolved-oxygen

16 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 concentrations were as low as 4.0 mg/L on 3 days (3.0 percent of measured days) at the Benjamin Franklin Bridge site and on 0 days (0 percent) at the Chester site (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 acidic, whereas solutions with a pH greater than 7 are basic or alkaline. The pH of uncontaminated surface water typically 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 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 (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, 6.7–7.6; Chester, 6.9–7.5; and Reedy Island Jetty, 7.2–7.8 (USGS, 2020d, f, h). The pH of water in the Delaware River estuary is usually lowest near the Trenton site and increases (water becomes more alkaline) in a downstream direction. The pH of water in the Delaware River estuary between the Benjamin Franklin Bridge site and the Reedy Island Jetty site was not a limiting factor for aquatic health or other beneficial water-uses during the report year.

EXPLANATION Average monthly, 1964 to 2015 Monthly average, 2015

Water temperature, in degrees Celsius

April

May

June

July

August

September

October

November

2015

Figure 7. Bar chart showing monthly average water temperatures in 2015 and long-term mean monthly water temperatures from 1964 to 2015, for April through November, in the Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (U.S. Geological Survey [USGS] site number 01467200; data from USGS, 2020d). Water temperatures are given in degrees Celsius.

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 sites on the Delaware River estuary, 1965–2015, at (A) Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (Pa.) (U.S. Geological Survey [USGS] site number 01457200; data from USGS, 2020d); and (B) Delaware River at Chester, Pa. (USGS site number 01477050; data from USGS, 2020f).

18 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 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

30 0

Percent of time

Figure 9. Graphs showing percent distribution of quarter-hourly dissolved-oxygen concentrations, in milligrams per liter, at two sites on the Delaware River estuary, from July to September 2015 at (A) Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (Pa.) (U.S. Geological Survey [USGS] site number 01467200; data from USGS, 2020e); and (B) Delaware River at Chester, Pa. (USGS site number 01477050; 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 of Montague, New Jersey. [Data are from the National Weather Service, the New York City Department of Environmental Protection, and the Office of the Delaware River Master. in., inch; —, not applicable]

December 2014–November 2015 Month

December 1940–November 2014 monthly average precipitation (in.)

Precipitation (in.)

Percent of average

Excess or deficit precipitation compared with long-term average (in.) Month

Cumulative

December

3.50

2.79

–0.17

January

3.02

2.21

–0.81

–1.52

February

2.64

1.59

–1.05

–2.57

March

3.39

2.21

–1.18

–3.75

April

3.76

3.37

–0.39

–4.14

May

4.20

2.06

–2.14

–6.28

June

4.22

7.76

184

3.54

–2.74

July

4.20

4.93

117

0.73

–2.01

August

4.05

3.89

–0.16

–2.17

September

4.08

4.77

117

0.69

–1.48

October

3.73

3.89

104

0.16

–1.32

November

3.70

2.75

–0.95

–2.27

Total

44.49

42.22

—

20 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 3. Storage in Pepacton Reservoir, New York, for report year ending November 30, 2015. [Delaware River Master daily operations record; gage reading at 0800 hours. Data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. Storage is given in millions of gallons above the elevation of 1,152.00 feet. Add 7,711 million gallons for total contents above the sill of the outlet tunnel at the elevation of 1,126.50 feet. Storage at the spillway level is 140,190 million gallons. —, not applicable; Mgal/d, million gallons per day; ft3/s, cubic foot per second] Day

Dec. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

Nov. 2015

86,737

96,506

100,884

94,725

96,234

135,928

133,186

140,209

132,629

118,208

105,478

99,213

86,637

96,992

101,070

94,725

96,598

136,181

133,329

140,394

132,434

117,669

105,589

99,167

86,523

97,404

100,915

94,351

97,450

136,490

133,132

140,301

132,200

117,182

105,462

99,044

86,551

97,938

100,823

94,036

99,490

136,672

132,916

140,190

131,719

116,713

105,257

98,890

86,508

98,844

100,730

93,662

101,961

136,836

132,611

140,098

131,238

116,211

105,002

98,629

86,451

99,428

100,606

93,288

103,594

137,018

132,255

139,859

130,688

115,742

104,717

98,399

86,680

99,583

100,466

92,917

105,225

137,181

131,933

139,564

130,209

115,227

104,320

98,184

86,751

99,753

100,528

92,531

107,124

137,401

131,541

139,271

129,642

114,761

103,893

97,908

86,923

99,939

100,636

92,531

109,965

137,528

131,844

138,903

129,077

114,246

103,452

97,664

87,281

100,125

100,528

92,175

112,794

137,730

132,255

138,811

128,549

113,881

103,152

97,282

87,509

100,466

100,342

91,777

116,009

137,820

132,434

138,553

128,146

113,453

102,775

97,206

87,710

100,823

100,001

91,570

118,731

137,857

132,344

138,058

127,794

112,975

102,383

97,359

87,811

100,978

99,706

91,394

120,633

137,839

132,379

137,565

127,337

112,613

101,976

97,359

88,129

101,024

99,397

91,555

122,190

137,893

132,416

137,036

126,883

112,152

101,507

97,359

88,474

101,055

99,060

91,762

123,670

137,784

133,258

136,763

126,359

111,677

101,133

97,343

88,489

101,086

98,659

91,968

124,794

137,657

134,678

136,617

125,870

111,186

100,823

97,282

88,518

101,086

98,352

92,234

125,905

137,547

135,258

136,417

125,331

110,713

100,544

97,146

88,778

101,273

98,014

92,576

126,848

137,401

135,711

136,055

124,777

110,241

100,544

96,962

88,907

101,554

97,694

92,858

127,565

137,218

136,091

135,982

124,291

109,770

100,528

96,810

89,009

101,773

97,343

93,155

128,357

136,908

136,399

135,819

123,739

109,299

100,450

97,084

89,374

101,758

96,992

93,422

129,288

136,617

136,836

135,493

123,566

108,813

100,109

97,359

89,723

101,695

96,856

93,662

130,280

136,272

137,875

135,185

123,273

108,347

99,784

97,389

89,826

101,648

96,871

93,841

131,256

135,946

138,737

134,678

122,791

107,798

99,413

97,786

90,103

101,586

96,567

94,051

132,076

135,602

139,124

134,192

122,241

107,412

99,106

97,923

90,790

101,695

96,144

94,231

132,862

135,239

139,400

133,743

121,848

106,916

98,813

97,816

92,234

101,804

95,735

94,516

133,527

134,877

139,436

133,473

121,334

106,404

98,537

97,832

93,303

101,570

95,342

94,980

134,120

134,498

139,363

133,509

120,838

105,956

98,214

97,786

94,276

101,367

94,980

95,222

134,678

134,372

139,363

133,455

120,310

105,446

97,786

97,740

95,161

101,133

—

95,463

135,058

134,048

139,564

133,293

119,784

105,002

98,214

97,664

95,856

100,900

—

95,659

135,493

133,671

139,785

133,060

119,257

104,970

98,983

97,556

96,234

100,853

—

95,917

—

133,419

—

132,934

118,731

—

99,182

—

Change1

+9,479

+4,347

–5,904

+1,192

+39,259

–2,509

+6,599

–7,275

–13,898

–13,238

–6,296

–1,657

Equivalent change2 (Mgal/d)

+306.4

+140.2

–210.9

+38.5

+1,308.6

–80.9

+220.0

–234.7

–448.3

–441.3

–203.1

–55.2

Equivalent change3 (ft3/s)

+462

+217

–326

+60

+2,024

–125

+340

–363

–694

–683

–314

–85.0

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 +10,819.0 million gallons; minimum and maximum storage for December through May are 86,451 and 137,893 million gallons, respectively. Minimum and maximum storage for June through November are 96,810 and 140,394 million gallons, respectively. 2The net equivalent change for the year is +29.6 million gallons per day. 3The net equivalent change for the year is +45.8 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, 2015. [Delaware River Master daily operations record; gage reading at 0800 hours. Data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. Storage is given in millions of gallons above the elevation of 1,040.00 feet. Add 2,584 million gallons for total contents above the sill of the 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. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug 2015

Sept. 2015

Oct. 2015

Nov. 2015

44,255

58,412

59,120

56,116

57,276

96,044

89,925

95,706

72,602

64,912

53,681

48,570

44,622

58,668

58,986

56,129

57,460

95,867

89,925

97,605

71,238

64,644

53,914

49,037

44,867

58,900

58,778

55,970

58,278

95,660

89,940

97,943

70,576

64,377

54,042

49,469

45,145

59,242

58,546

55,799

61,231

95,417

89,910

97,492

70,099

64,096

54,159

49,819

45,356

60,158

58,351

55,579

64,899

95,143

89,849

97,106

69,768

63,713

54,206

50,111

45,556

60,671

58,131

55,372

67,165

94,854

89,788

96,623

69,530

63,332

53,891

50,367

46,112

60,976

57,899

55,274

69,265

94,565

89,499

96,173

69,278

62,899

53,436

50,589

46,591

61,142

57,679

55,262

71,795

94,413

89,180

95,508

69,013

62,416

52,957

50,776

46,980

61,218

57,496

55,250

75,086

94,261

89,226

94,930

68,722

61,893

52,432

50,951

47,580

61,333

57,301

55,079

78,871

94,063

89,271

94,733

68,470

61,677

52,129

51,103

48,092

61,396

57,069

55,018

83,013

93,881

89,058

94,763

68,430

61,575

51,896

51,884

48,470

61,473

56,837

55,176

85,889

93,653

88,784

94,504

68,338

61,396

51,627

53,541

48,726

61,613

56,886

55,237

87,695

93,409

88,572

94,276

68,192

61,256

51,289

54,556

48,915

61,613

56,800

55,225

89,149

93,196

88,359

93,790

68,007

61,091

50,974

55,445

49,084

61,562

56,861

55,140

90,397

92,923

88,906

93,166

67,768

60,964

50,589

56,177

49,235

61,536

56,922

55,115

91,264

92,694

90,062

92,040

67,543

60,793

50,087

56,788

49,410

61,498

56,812

55,066

91,918

92,573

90,777

90,838

67,397

60,622

49,562

57,313

49,959

61,384

56,886

55,152

92,466

92,299

91,203

89,591

67,190

60,256

48,981

57,777

50,391

61,307

56,934

55,201

92,847

92,147

91,553

88,389

66,961

59,633

48,414

58,168

50,683

61,243

56,825

55,201

93,105

91,903

91,614

87,334

66,732

59,083

47,803

58,803

50,928

61,154

56,703

55,237

93,516

91,690

91,659

86,178

66,656

58,473

47,336

59,462

51,126

60,976

56,751

55,274

94,322

91,477

92,223

84,993

66,643

57,814

46,869

59,999

51,313

60,829

56,800

55,274

94,900

91,248

92,679

83,721

66,528

57,166

46,390

60,439

51,639

60,671

56,690

55,286

95,402

91,005

92,999

82,463

66,337

56,483

45,912

60,854

52,747

60,512

56,532

55,274

95,754

90,762

93,196

81,105

66,159

55,713

45,501

61,218

54,101

60,366

56,544

55,298

96,012

90,503

93,303

79,908

66,134

54,932

45,078

61,562

55,140

60,170

56,361

55,713

96,173

90,458

93,379

78,747

66,006

54,171

44,956

61,855

56,031

59,950

56,141

56,300

96,253

90,458

93,516

77,545

65,828

53,447

44,956

62,123

56,971

59,731

—

56,580

96,237

90,442

93,850

76,260

65,650

53,074

45,512

62,377

57,618

59,535

—

56,825

96,173

90,229

94,155

74,975

65,421

53,167

47,080

62,606

58,094

59,352

—

57,069

—

89,986

—

73,821

65,179

—

47,914

—

Change1

+13,839

+940

–2,979

+953

+38,897

–6,058

+4,230

–21,885

–7,423

–11,745

–5,767

+14,036

Equivalent change2 (Mgal/d)

+446.4

+30.3

–106.4

+30.7

+1,296.6

–195.4

+141.0

Equivalent change3 (ft3/s)

+691

–47.0

–165

+47.5

+2,006

–302

+218

–706.0

–1,092

–239.5

–391.5

–186.0

+467.9

–371

–606

–288

+724

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 +18,351.0 million gallons; minimum and maximum storage for December–May are 44,255 and 96,253 million gallons, respectively. Minimum and maximum storage for June–November are 44,956 and 97,943, respectively. 2The net equivalent change for the year is +50.3 million gallons per day. 3The net equivalent change for the year is +77.8 cubic feet per second.

22 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 5. Storage in Neversink Reservoir, New York, for report year ending November 30, 2015. [Delaware River Master daily operations record; gage reading at 0800 hours. Data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. Storage is given in millions of gallons above the elevation of 1,319.00 feet. Add 525 million gallons for total contents above the sill of the 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. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

Nov. 2015

23,465

28,429

27,927

23,785

22,579

33,684

33,630

35,140

32,933

29,787

26,868

27,666

23,557

28,530

27,974

23,790

22,615

33,765

33,843

35,135

32,895

29,625

26,966

27,809

23,609

28,632

27,857

23,585

22,713

33,838

33,504

34,971

32,857

29,441

27,013

27,849

23,721

28,786

27,736

23,405

23,044

33,920

33,596

34,823

32,742

29,261

27,039

27,879

23,838

29,128

27,619

23,199

23,493

33,988

33,273

34,710

32,605

29,074

27,064

27,949

23,938

29,279

27,507

23,000

23,769

34,037

33,297

34,552

32,425

29,035

27,073

28,014

24,246

29,208

27,369

22,795

24,088

34,096

33,389

34,404

32,250

28,977

27,077

28,036

24,434

29,114

27,395

22,591

24,633

34,106

33,470

34,468

32,056

28,804

27,056

28,080

24,568

29,008

27,438

22,575

25,209

34,199

33,529

34,528

32,014

28,592

26,923

28,114

24,817

28,911

27,318

22,373

25,725

34,238

33,509

34,538

31,962

28,434

26,791

28,171

24,924

28,985

27,197

22,190

26,757

34,281

33,558

34,538

31,850

28,271

26,786

28,359

25,047

29,088

26,957

22,058

27,382

34,316

33,441

34,591

31,855

28,236

26,774

28,866

25,147

29,066

26,757

21,919

27,949

34,350

33,360

34,606

31,855

28,346

26,587

29,208

25,234

28,999

26,549

21,953

28,628

34,301

33,475

34,523

31,826

28,455

26,401

29,482

25,308

28,911

26,350

22,000

29,369

34,316

33,620

34,562

31,648

28,411

26,202

29,638

25,391

28,839

26,131

22,035

29,832

34,374

33,876

34,582

31,606

28,241

26,160

29,792

25,491

28,738

25,934

22,073

30,213

34,438

33,819

34,473

31,565

28,032

26,152

29,946

25,574

28,791

25,754

22,128

30,639

34,453

33,736

34,365

31,373

27,849

26,135

30,064

25,658

28,906

25,595

22,132

30,980

34,478

33,639

34,365

31,183

27,662

26,118

30,164

25,725

28,981

25,354

22,182

31,243

34,492

33,596

34,365

30,993

27,619

26,102

31,174

25,796

28,888

25,101

22,225

31,620

34,513

33,833

34,155

30,919

27,580

26,089

31,771

25,879

28,756

25,114

22,256

32,094

34,296

34,582

33,993

30,841

27,528

26,072

32,085

25,955

28,663

25,114

22,275

32,410

34,243

34,552

33,824

30,818

27,339

26,072

32,302

26,005

28,561

24,891

22,295

32,686

34,243

34,596

33,644

30,772

27,150

26,064

32,468

26,714

28,614

24,649

22,291

32,881

34,238

34,503

33,437

30,607

26,957

26,085

32,577

27,378

28,641

24,426

22,314

33,062

34,233

34,587

33,379

30,415

26,769

26,106

32,681

27,679

28,416

24,201

22,380

33,221

33,969

34,725

33,465

30,364

26,723

26,110

32,781

27,905

28,285

23,983

22,439

33,360

33,906

34,966

33,437

30,305

26,676

26,118

32,890

28,114

28,110

—

22,482

33,480

33,717

35,160

33,331

30,105

26,613

26,697

32,981

28,285

28,009

—

22,529

33,582

33,475

35,095

33,120

30,059

26,574

27,318

33,077

28,416

27,909

—

22,568

—

33,499

—

33,067

30,004

—

27,524

—

Change1

+4,951

–520

–3,944

–1,217

+11,003

+1,465

–2,073

–2,929

–3,213

+656

+5,411

–185.0

Equivalent change2 (Mgal/d)

+159.7

–16.8

–140.9

–39.3

+366.8

–6.0

+48.8

–66.9

–94.5

–107.1

+21.2

+180.4

Equivalent change3 (ft3/s)

+247

–26.0

–218

–60.8

+567

–9.3

+75.5

–103

–146

–166

+32.8

+279

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 more than +9,612.0 million gallons; minimum and maximum storage for December–May are 21,919 and 34,513 million gallons, respectively. Minimum and maximum storage for June–November is 26,064 and 35,160 million gallons, respectively. 2The net equivalent change for the year is +26.3 million gallons per day. 3The net equivalent change for the year is +40.7 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, 2015. [Delaware River Master daily operations record. Diversions in million gallons per day; data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. —, not applicable. For December 1–May 31, the average is computed from June 1, 2013, to the given date. For June 1– November 30, the average is computed from June 1, 2014, to the given date. The diversion calculation is computed as authorized within the Decree] Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

12/1/2014

488

191

559

1/1/2015

300

552

12/2/2014

489

299

560

1/2/2015

300

551

12/3/2014

489

300

561

1/3/2015

301

549

12/4/2014

489

301

563

1/4/2015

301

548

564

1/5/2015

300

547

12/5/2014

489

301

12/6/2014

489

301

565

1/6/2015

205

299

203

548

12/7/2014

489

301

566

1/7/2015

205

300

205

549

12/8/2014

342

243

566

1/8/2015

205

300

204

549

12/9/2014

301

231

566

1/9/2015

204

300

203

550

12/10/2014

302

231

566

1/10/2015

300

549

12/11/2014

302

232

566

1/11/2015

300

548

12/12/2014

301

261

566

1/12/2015

205

300

152

548

12/13/2014

271

564

1/13/2015

206

300

150

549

12/14/2014

271

563

1/14/2015

205

300

152

549

12/15/2014

300

271

563

1/15/2015

204

300

152

550

12/16/2014

300

271

563

1/16/2015

205

300

153

550

12/17/2014

300

272

563

1/17/2015

300

549

12/18/2014

300

296

563

1/18/2015

300

548

12/19/2014

300

301

563

1/19/2015

300

547

12/20/2014

301

562

1/20/2015

208

300

151

547

12/21/2014

301

561

1/21/2015

205

300

152

548

12/22/2014

216

300

561

1/22/2015

205

300

152

548

12/23/2014

200

300

560

1/23/2015

205

300

152

549

12/24/2014

300

559

1/24/2015

300

548

12/25/2014

301

558

1/25/2015

300

547

12/26/2014

300

557

1/26/2015

389

300

289

549

12/27/2014

300

555

1/27/2015

217

300

163

549

12/28/2014

300

554

1/28/2015

201

300

152

550

12/29/2014

301

553

1/29/2015

202

299

152

550

12/30/2014

200

301

553

1/30/2015

201

299

149

550

12/31/2014

197

300

101

553

1/31/2015

299

549

Total

7,297

8,750

101

—

Total

3,877

9,298

3,086

—

24 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 6. Diversions to New York City water-supply system for report year ending November 30, 2015.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day; data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. —, not applicable. For December 1–May 31, the average is computed from June 1, 2013, to the given date. For June 1– November 30, the average is computed from June 1, 2014, to the given date. The diversion calculation is computed as authorized within the Decree] Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

2/1/2015

299

548

3/1/2015

554

2/2/2015

207

299

161

549

3/2/2015

400

169

198

555

2/3/2015

205

299

152

549

3/3/2015

400

201

198

556

2/4/2015

205

299

134

550

3/4/2015

400

200

203

556

2/5/2015

205

299

152

550

3/5/2015

400

200

201

557

2/6/2015

205

299

153

550

3/6/2015

400

201

558

2/7/2015

299

549

3/7/2015

383

203

558

2/8/2015

299

548

3/8/2015

556

2/9/2015

206

299

154

549

3/9/2015

400

192

200

557

2/10/2015

229

299

154

549

3/10/2015

400

109

199

557

2/11/2015

400

299

234

551

3/11/2015

400

201

557

2/12/2015

400

227

551

3/12/2015

399

191

199

558

2/13/2015

400

149

228

552

3/13/2015

382

558

2/14/2015

400

223

552

3/14/2015

382

557

2/15/2015

400

228

553

3/15/2015

383

556

2/16/2015

400

149

226

554

3/16/2015

383

556

2/17/2015

400

200

554

3/17/2015

383

555

2/18/2015

400

202

554

3/18/2015

383

555

2/19/2015

407

174

244

555

3/19/2015

383

554

2/20/2015

406

164

278

556

3/20/2015

332

553

2/21/2015

201

555

3/21/2015

332

552

2/22/2015

553

3/22/2015

329

552

2/23/2015

380

138

226

553

3/23/2015

259

551

554

3/24/2015

280

550

2/24/2015

400

124

227

2/25/2015

400

226

554

3/25/2015

280

549

2/26/2015

400

193

227

555

3/26/2015

547

2/27/2015

400

202

226

556

3/27/2015

244

546

2/28/2015

216

196

556

3/28/2015

277

546

Total

7,872

4,607

4,681

—

3/29/2015

277

545

3/30/2015

280

544

3/31/2015

280

543

Total

4,038

7,273

2,011

—

Tables 1, 3–11, and 13–20 25 Table 6. Diversions to New York City water-supply system for report year ending November 30, 2015.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day; data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. —, not applicable. For December 1–May 31, the average is computed from June 1, 2013, to the given date. For June 1– November 30, the average is computed from June 1, 2014, to the given date. The diversion calculation is computed as authorized within the Decree] East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

4/1/2015

280

542

5/1/2015

485

533

4/2/2015

280

541

5/2/2015

485

533

4/3/2015

281

540

5/3/2015

484

533

4/4/2015

281

540

5/4/2015

484

532

4/5/2015

281

539

5/5/2015

484

532

4/6/2015

279

538

5/6/2015

484

532

4/7/2015

279

537

5/7/2015

296

532

4/8/2015

457

537

5/8/2015

298

531

4/9/2015

474

537

5/9/2015

298

530

4/10/2015

439

536

5/10/2015

298

529

4/11/2015

478

536

5/11/2015

298

529

4/12/2015

479

536

5/12/2015

298

529

4/13/2015

480

536

5/13/2015

298

528

4/14/2015

480

536

5/14/2015

255

298

528

4/15/2015

481

535

5/15/2015

300

298

528

4/16/2015

481

535

5/16/2015

300

298

528

4/17/2015

481

535

5/17/2015

300

298

529

4/18/2015

482

535

5/18/2015

300

298

529

4/19/2015

482

535

5/19/2015

367

298

529

4/20/2015

482

535

5/20/2015

400

298

530

4/21/2015

482

534

5/21/2015

401

236

253

531

4/22/2015

483

534

5/22/2015

400

229

531

4/23/2015

483

534

5/23/2015

401

229

531

4/24/2015

484

534

5/24/2015

400

229

532

4/25/2015

484

534

5/25/2015

400

229

532

4/26/2015

484

534

5/26/2015

400

300

532

4/27/2015

484

534

5/27/2015

400

298

533

4/28/2015

485

533

5/28/2015

399

298

533

4/29/2015

485

533

5/29/2015

399

178

297

534

4/30/2015

485

533

5/30/2015

399

227

535

Total

12,976

—

5/31/2015

399

534

Total

6,770

8,712

1,500

—

Date

26 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 6. Diversions to New York City water-supply system for report year ending November 30, 2015.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day; data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. —, not applicable. For December 1–May 31, the average is computed from June 1, 2013, to the given date. For June 1– November 30, the average is computed from June 1, 2014, to the given date. The diversion calculation is computed as authorized within the Decree] East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

7/1/2015

230

515

7/2/2015

300

203

514

318

7/3/2015

300

248

515

417

418

7/4/2015

300

248

516

431

7/5/2015

300

247

517

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

6/1/2015

6/2/2015

154

495

327

6/3/2015

300

6/4/2015

302

6/5/2015

400

Date

6/6/2015

400

224

463

7/6/2015

340

230

519

6/7/2015

400

230

487

7/7/2015

350

272

522

6/8/2015

149

114

189

482

7/8/2015

349

296

525

6/9/2015

124

297

476

7/9/2015

147

519

6/10/2015

141

298

472

7/10/2015

272

160

110

520

6/11/2015

300

299

226

504

7/11/2015

399

197

522

6/12/2015

301

298

202

529

7/12/2015

399

197

524

6/13/2015

300

298

534

7/13/2015

399

329

114

531

6/14/2015

300

298

539

7/14/2015

476

532

6/15/2015

301

175

539

7/15/2015

475

531

6/16/2015

301

226

538

7/16/2015

474

106

532

6/17/2015

301

230

538

7/17/2015

114

473

535

6/18/2015

301

227

537

7/18/2015

473

534

6/19/2015

301

247

147

545

7/19/2015

472

532

6/20/2015

301

299

548

7/20/2015

132

472

134

537

6/21/2015

301

540

7/21/2015

132

471

131

540

6/22/2015

317

532

7/22/2015

208

470

133

546

6/23/2015

254

335

534

7/23/2015

208

469

135

551

207

469

187

556 559

6/24/2015

372

298

540

7/24/2015

6/25/2015

476

540

7/25/2015

206

465

6/26/2015

500

538

7/26/2015

125

467

559

6/27/2015

501

537

7/27/2015

467

559

6/28/2015

501

536

7/28/2015

149

466

114

562

6/29/2015

416

156

537

7/29/2015

186

465

189

567

6/30/2015

103

524

7/30/2015

186

437

568

Total

8,726

2,860

4,141

—

7/31/2015

281

464

119

573

Total

6,304

9,929

2,998

—

Tables 1, 3–11, and 13–20 27 Table 6. Diversions to New York City water-supply system for report year ending November 30, 2015.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day; data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. —, not applicable. For December 1–May 31, the average is computed from June 1, 2013, to the given date. For June 1– November 30, the average is computed from June 1, 2014, to the given date. The diversion calculation is computed as authorized within the Decree] East Delaware

West Delaware

Neversink

Average from

Tunnel

Tunnel)

Tunnel

June 1

9/1/2015

450

133

574

9/2/2015

450

151

574

569

9/3/2015

450

152

574

114

570

9/4/2015

450

151

575

114

571

9/5/2015

450

573

501

150

572

9/6/2015

450

572

500

159

573

9/7/2015

450

153

572

8/8/2015

500

572

9/8/2015

450

154

573

8/9/2015

501

571

9/9/2015

449

154

573

8/10/2015

500

151

572

9/10/2015

450

154

573

8/11/2015

500

151

573

9/11/2015

450

572

8/12/2015

500

572

9/12/2015

450

571

8/13/2015

464

571

9/13/2015

450

570

8/14/2015

501

151

572

9/14/2015

450

569

8/15/2015

501

571

9/15/2015

450

153

569

8/16/2015

500

570

9/16/2015

450

156

570

8/17/2015

500

152

571

9/17/2015

439

155

570

8/18/2015

500

150

572

9/18/2015

450

153

570

8/19/2015

500

152

573

9/19/2015

450

569

8/20/2015

500

151

574

9/20/2015

450

568

8/21/2015

500

151

575

9/21/2015

450

567

8/22/2015

500

574

9/22/2015

450

155

567

8/23/2015

501

573

9/23/2015

400

156

567

450

157

568 568

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

8/1/2015

198

463

575

8/2/2015

201

569

8/3/2015

475

114

8/4/2015

500

8/5/2015

500

8/6/2015 8/7/2015

Date

8/24/2015

501

151

574

9/24/2015

8/25/2015

500

151

575

9/25/2015

450

156

8/26/2015

500

574

9/26/2015

450

567

8/27/2015

501

573

9/27/2015

450

566

8/28/2015

501

151

574

9/28/2015

450

565

8/29/2015

500

573

9/29/2015

450

151

565

8/30/2015

500

572

9/30/2015

114

151

563

8/31/2015

500

172

574

Total

13,102

2,778

—

Total

14,846

479

2,485

—

28 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 6. Diversions to New York City water-supply system for report year ending November 30, 2015.—Continued [Delaware River Master daily operations record. Diversions in million gallons per day; data provided by New York City, Department of Environmental Protection, Bureau of Water Supply. —, not applicable. For December 1–May 31, the average is computed from June 1, 2013, to the given date. For June 1– November 30, the average is computed from June 1, 2014, to the given date. The diversion calculation is computed as authorized within the Decree.] Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

Date

East Delaware

West Delaware

Neversink

Average from

Tunnel

June 1

10/1/2015

558

11/1/2015

451

523

10/2/2015

219

556

11/2/2015

451

522

10/3/2015

305

554

11/3/2015

451

522

10/4/2015

305

552

11/4/2015

451

522

10/5/2015

300

550

11/5/2015

451

521

10/6/2015

451

549

11/6/2015

450

521

10/7/2015

451

548

11/7/2015

450

520

10/8/2015

451

134

548

11/8/2015

451

520

10/9/2015

451

150

549

11/9/2015

451

519

10/10/2015

451

548

11/10/2015

451

519

10/11/2015

451

547

11/11/2015

451

519

10/12/2015

451

201

548

11/12/2015

451

518

10/13/2015

451

201

549

11/13/2015

451

518

10/14/2015

451

201

550

11/14/2015

451

517

10/15/2015

319

548

11/15/2015

451

517

10/16/2015

300

546

11/16/2015

451

517

10/17/2015

542

11/17/2015

451

516

10/18/2015

539

11/18/2015

451

516

10/19/2015

535

11/19/2015

451

515

10/20/2015

348

533

11/20/2015

451

515

10/21/2015

347

532

11/21/2015

451

515

10/22/2015

350

531

11/22/2015

512

10/23/2015

350

530

11/23/2015

229

510

528

11/24/2015

301

509 508

10/24/2015

351

10/25/2015

351

527

11/25/2015

297

10/26/2015

350

526

11/26/2015

293

507

10/27/2015

427

525

11/27/2015

298

505

10/28/2015

451

525

11/28/2015

301

504 503

10/29/2015

451

524

11/29/2015

301

10/30/2015

451

524

11/30/2015

301

502

10/31/2015

451

523

Total

11,790

—

Total

10,486

913

—

Tables 1, 3–11, and 13–20 29 Table 7. Consumption of water by New York City from 1950 to 2015. [Data provided by New York City Department of Environmental Protection, Bureau of Water Supply. Mgal/d, million gallons per day]

Year

Average daily consumption Outside communities (Mgal/d)

Total (Mgal/d)

Annual consumption (in billions of gallons)

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

1991

1,469.9

123.6

1,593.5

581.6

City proper (Mgal/d)

30 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 7. Consumption of water by New York City from 1950 to 2015.—Continued [Data provided by New York City Department of Environmental Protection, Bureau of Water Supply. Mgal/d, million gallons per day]

Year City proper (Mgal/d)

Average daily consumption Outside communities (Mgal/d)

Total (Mgal/d)

Annual consumption (in billions of gallons)

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

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 the report year ending November 30, 2015. [Data from 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. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

100

81e

89e

96e

94e

101

82e

103

78e

100

79e

100

76e

100

76e

102

78e

103

80e

101

101e

76e

100

111

100

102

100

—

75e

100

—

78e

—

Total1

2,458

2,741

2,668

2,768

2,710

2,770

2,474

2,588

2,336

2,178

2,713

2,904

Mean2

79.3

88.4

95.3

89.3

90.3

89.4

82.5

83.5

75.4

72.6

87.5

96.8

1The year’s total is 31,308 million gallons. 2The combined mean is 85.8 million gallons per day.

Nov. 2015

[Delaware River Master daily operations record. The Montague design rate was 1,750 cubic feet per second (ft3/s). Column (col.) 1 data provided by electric utilities PPL Corporation and Talen Energy; col. 2 data provided by Eagle Creek Renewable Energy, LLC; col. 3 computed from index stations; 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; cols. 10, 12, 13, and 14 are accumulated from the previous water year starting June 1, 2014, with these values being reset on June 1, 2015; (ft3/s)-d, cubic foot per second accumulated daily] Advance estimate of discharge of Delaware River at Montague New Jersey, exclusive of New York City reservoir releases

Date of advance estimate

Powerplant release forecasts

Uncontrolled runoff

Lake Wallenpaupack (ft3/s)

Rio Reservoir (ft3/s)

Current condition (ft3/s)

Weather adjustment (ft3/s)

Col. 1

Col. 2

Col. 3

Col. 4

Montague date

Discharge (ft3/s)

Col. 5

Computation of balancing adjustment Indicated deficiency

Col. 6

Balancing adjustment

Col. 7

Directed release (ft3/s)

Col. 8

Adjusted directed release

Actual deficiency

Daily (ft3/s)

Cumulative (ft3/s-d)

Daily (ft3/s)

Cumulative (ft3/s-d)

Col. 9

Col. 10

Col. 11

80,113

Cumulative difference (ft3/s-d)

Balancing adjustment (ft3/s)

Col. 12

Col. 13

Col. 14

79,912

201

–20 4

The estimated Montague discharge was greater than the Montague design rate from 12/1/2014 to 5/12/2015 5/10/2015

1,726

5/13/2015

1,911

–20

5/11/2015

1,655

5/14/2015

5/12/2015

1,435

5/15/2015

5/13/2015

177

1,540

5/14/2015

1,350

5/15/2015

1,240

5/16/2015

5/17/2015

5/18/2015

5/19/2015

1,804

–20

80,113

240

80,152

–39

1,438

312

–20

292

294

80,407

304

80,456

–49

5/16/2015

1,752

–20

80,407

183

80,639

–232

5/17/2015

1,424

326

–20

306

310

80,717

80,659

–6

5/18/2015

1,306

444

448

449

81,166

80,659

507

–50

1,146

147

5/19/2015

1,328

422

427

468

81,634

80,659

975

–50

2,027

5/20/2015

2,203

81,634

80,659

975

–50

1,907

5/21/2015

2,078

–6

81,634

80,659

975

–50

291

2,000

5/22/2015

2,313

–50

81,634

80,659

975

–50

5/20/2015

291

1,809

5/23/2015

2,171

–50

81,634

80,659

975

–50

5/21/2015

1,800

5/24/2015

1,800

–50

81,634

239

80,898

736

–50

5/22/2015

1,750

5/25/2015

1,750

–50

81,634

316

81,214

420

–42

5/23/2015

182

1,500

5/26/2015

1,682

–50

81,652

166

81,380

272

–27

5/24/2015

182

1,400

5/27/2015

1,687

–50

81,665

81,473

192

–19

5/25/2015

182

1,300

282

5/28/2015

1,764

–50

81,665

81,473

192

–19

5/26/2015

182

1,200

339

5/29/2015

1,721

–42

81,665

81,473

192

–19

5/27/2015

182

1,180

198

5/30/2015

1,560

190

–27

163

81,828

81,473

355

–36

5/28/2015

142

1,750

299

5/31/2015

2,191

–19

81,828

81,473

355

–36

7/25/2015

292

106

1,300

7/28/2015

1,750

–7

7/26/2015

292

1,100

7/29/2015

1,460

290

283

–28

7/27/2015

292

1,388

7/30/2015

1,750

290

283

–28

The estimated Montague discharge was greater than the Montague design rate from 6/1/2015 to 7/27/2015

32 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Table 9. New York City reservoir release design data from December 1, 2014, to October 31, 2015.

Table 9. New York City reservoir release design data from December 1, 2014, to October 31, 2015.—Continued [Delaware River Master daily operations record. The Montague design rate was 1,750 cubic feet per second (ft3/s). Column (col.) 1 data provided by electric utilities PPL Corporation and Talen Energy; col. 2 data provided by Eagle Creek Renewable Energy, LLC; col. 3 computed from index stations; 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; cols. 10, 12, 13, and 14 are accumulated from the previous water year starting June 1, 2014, with these values being reset on June 1, 2015; (ft3/s)-d, cubic foot per second accumulated daily] Advance estimate of discharge of Delaware River at Montague New Jersey, exclusive of New York City reservoir releases

Date of advance estimate

Powerplant release forecasts Lake Wallenpaupack (ft3/s)

Rio Reservoir (ft3/s)

Uncontrolled runoff Current condition (ft3/s)

Weather adjustment (ft3/s)

Montague date

Discharge (ft3/s)

Computation of balancing adjustment Indicated deficiency

Balancing adjustment

Directed release (ft3/s)

Adjusted directed release

Actual deficiency

Daily (ft3/s)

Cumulative (ft3/s-d)

Daily (ft3/s)

Cumulative (ft3/s-d)

Cumulative difference (ft3/s-d)

Balancing adjustment (ft3/s)

Col. 2

Col. 3

Col. 4

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

292

2,050

7/31/2015

2,444

290

283

–28

7/29/2015

365

124

1,990

8/1/2015

2,514

290

283

–28

7/30/2015

292

1,850

8/2/2015

2,303

–28

290

283

–28

7/31/2015

292

1,660

8/3/2015

2,015

–28

290

283

–28

8/1/2015

292

1,590

8/4/2015

2,015

–28

290

223

–22

8/2/2015

292

1,460

100

8/5/2015

1,941

–28

290

459

526

–236

8/3/2015

222

1,374

119

8/6/2015

1,750

–28

290

538

1,064

–774

8/4/2015

222

1,350

8/7/2015

1,575

175

–28

147

437

623

1,687

–1,250

8/5/2015

333

106

1,050

8/8/2015

1,489

261

–28

233

670

556

2,243

–1,573

8/6/2015

222

750

8/9/2015

972

778

802

801

1,471

771

3,014

–1,543

8/7/2015

222

710

8/10/2015

1,003

747

797

2,268

771

3,785

–1,517

8/8/2015

292

680

136

8/11/2015

1,197

553

603

2,871

566

4,351

–1,480

8/9/2015

292

690

679

8/12/2015

1,750

2,871

4,351

–1,480

8/10/2015

292

106

1,023

329

8/13/2015

1,750

2,871

4,351

–1,480

8/11/2015

292

106

1,750

8/14/2015

2,235

2,871

265

4,616

–1,745

8/12/2015

293

1,750

8/15/2015

2,133

2,871

383

4,999

–2,128

8/13/2015

292

1,750

8/16/2015

2,068

2,871

463

5,462

–2,591

8/14/2015

292

106

1,150

8/17/2015

1,548

202

252

3,123

383

5,845

–2,722

8/15/2015

293

106

900

8/18/2015

1,299

451

501

3,624

442

6,287

–2,663

8/16/2015

293

160

750

8/19/2015

1,203

547

597

4,221

424

6,711

–2,490

8/17/2015

345

230

680

8/20/2015

1,257

493

†50

493

4,764

504

7,215

–2,451

8/18/2015

293

106

650

8/21/2015

1,078

672

722

5,486

7,215

–1,729

8/19/2015

293

924

533

8/22/2015

1,750

5,486

7,215

–1,729

8/20/2015

293

177

625

655

8/23/2015

1,750

5,486

7,215

–1,729

Tables 1, 3–11, and 13–20 33

Col. 1 7/28/2015

Date of advance estimate

Powerplant release forecasts Lake Wallenpaupack (ft3/s)

Rio Reservoir (ft3/s)

Uncontrolled runoff Current condition (ft3/s)

Weather adjustment (ft3/s)

Montague date

Discharge (ft3/s)

Computation of balancing adjustment Indicated deficiency

Balancing adjustment

Directed release (ft3/s)

Adjusted directed release

Actual deficiency

Daily (ft3/s)

Cumulative (ft3/s-d)

Daily (ft3/s)

Cumulative (ft3/s-d)

Cumulative difference (ft3/s-d)

Balancing adjustment (ft3/s)

Col. 1

Col. 2

Col. 3

Col. 4

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

8/21/2015

293

1,457

8/24/2015

1,750

5,486

7,215

–1,729

8/22/2015

293

1,448

8/25/2015

1,750

5,486

7,255

–1,769

8/23/2015

293

1,446

8/26/2015

1,750

5,486

270

7,525

–2,039

8/24/2015

293

1,449

8/27/2015

1,750

5,486

440

7,965

–2,479

8/25/2015

293

1,457

8/28/2015

1,750

5,486

560

8,525

–3,039

8/26/2015

293

980

8/29/2015

1,273

477

527

6,013

630

9,155

–3,142

8/27/2015

293

900

8/30/2015

1,193

557

607

6,620

587

9,742

–3,122

8/28/2015

293

800

8/31/2015

1,094

656

706

7,326

449

10,191

–2,865

8/29/2015

293

750

9/1/2015

1,044

706

756

753

7,961

363

10,554

–2,593

8/30/2015

293

650

9/2/2015

945

805

855

856

8,817

506

11,060

–2,243

8/31/2015

293

700

9/3/2015

993

757

807

809

9,626

469

11,529

–1,903

9/1/2015

293

700

9/4/2015

1,030

720

770

774

10,400

684

12,213

–1,813

9/2/2015

293

650

9/5/2015

1,015

735

785

786

11,186

836

13,049

–1,863

9/3/2015

293

600

9/6/2015

901

849

899

903

12,089

953

14,002

–1,913

9/4/2015

293

600

9/7/2015

893

857

907

903

12,992

783

14,785

–1,793

9/5/2015

324

500

9/8/2015

824

926

976

947

13,939

647

15,432

–1,493

9/6/2015

324

450

9/9/2015

774

976

1,026

1,024

14,963

634

16,066

–1,103

9/7/2015

185

400

9/10/2015

602

1,148

1,198

1,208

16,171

748

16,814

–643

9/8/2015

185

450

400

9/11/2015

1,035

715

765

778

16,949

928

17,742

–793

9/9/2015

185

600

601

9/12/2015

1,386

364

402

17,351

875

18,617

–1,266

9/10/2015

233

600

653

9/13/2015

1,486

264

293

17,644

18,617

–973

9/11/2015

500

615

9/14/2015

1,115

635

–47

588

18,232

267

18,884

–652

9/12/2015

550

1,878

9/15/2015

2,428

18,232

593

19,477

–1,245

34 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Table 9. New York City reservoir release design data from December 1, 2014, to October 31, 2015.—Continued

Date of advance estimate

Powerplant release forecasts Lake Wallenpaupack (ft3/s)

Rio Reservoir (ft3/s)

Uncontrolled runoff Current condition (ft3/s)

Weather adjustment (ft3/s)

Montague date

Discharge (ft3/s)

Computation of balancing adjustment Indicated deficiency

Balancing adjustment

Directed release (ft3/s)

Adjusted directed release

Actual deficiency

Daily (ft3/s)

Cumulative (ft3/s-d)

Daily (ft3/s)

Cumulative (ft3/s-d)

Cumulative difference (ft3/s-d)

Balancing adjustment (ft3/s)

Col. 2

Col. 3

Col. 4

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

268

1,200

9/16/2015

1,469

281

–7

274

18,506

670

20,147

–1,641

9/14/2015

268

1,200

9/17/2015

1,468

282

–50

232

18,738

725

20,872

–2,134

9/15/2015

268

1,000

9/18/2015

1,268

482

–50

432

19,170

674

21,546

–2,376

9/16/2015

268

650

9/19/2015

918

832

–50

782

783

19,953

933

22,479

–2,526

9/17/2015

177

550

9/20/2015

798

952

1,173

20,955

778

23,257

–2,302

9/18/2015

600

9/21/2015

602

1,148

1,198

22,153

1,178

24,435

–2,282

9/19/2015

600

9/22/2015

610

1,140

1,190

1,193

23,346

1,213

25,648

–2,302

9/20/2015

500

9/23/2015

500

1,250

1,300

1,303

24,649

1,313

26,961

–2,312

9/21/2015

500

9/24/2015

500

1,250

1,300

1,296

25,945

1,286

28,247

–2,302

9/22/2015

499

9/25/2015

500

1,250

1,300

1,291

27,236

1,291

29,538

–2,302

9/23/2015

350

9/26/2015

350

1,400

1,450

1,444

28,680

1,354

30,892

–2,212

9/24/2015

133

217

9/27/2015

350

1,400

1,450

1,449

30,129

1,149

32,041

–1,912

9/25/2015

350

9/28/2015

350

1,400

1,450

1,447

31,576

1,377

33,418

–1,842

9/26/2015

356

9/29/2015

400

1,350

1,400

1,404

32,980

1,314

34,732

–1,752

9/27/2015

278

122

9/30/2015

400

1,350

1,400

1,147

34,127

34,732

–605

9/28/2015

350

3,313

10/1/2015

3,663

34,127

34,732

–605

9/29/2015

350

7,131

10/2/2015

7,481

34,127

34,732

–605

9/30/2015

1,000

2,308

10/3/2015

3,379

34,127

34,732

–605

10/1/2015

1,654

10/4/2015

1,750

34,127

34,732

–605

10/2/2015

1,701

10/5/2015

1,750

34,127

34,824

–697

10/3/2015

1,730

10/6/2015

1,750

34,127

182

35,006

–879

10/4/2015

1,050

10/7/2015

1,050

700

750

745

34,872

575

35,581

–709

10/5/2015

750

10/8/2015

750

1,000

1,050

1,043

35,915

613

36,194

–279

10/6/2015

596

10/9/2015

600

1,150

1,200

1,195

37,110

735

36,929

181

–18

Tables 1, 3–11, and 13–20 35

Col. 1 9/13/2015

Date of advance estimate

Powerplant release forecasts

Uncontrolled runoff

Lake Wallenpaupack (ft3/s)

Rio Reservoir (ft3/s)

Current condition (ft3/s)

Weather adjustment (ft3/s)

Montague date

Discharge (ft3/s)

Computation of balancing adjustment Indicated deficiency

Balancing adjustment

Directed release (ft3/s)

Adjusted directed release

Actual deficiency

Daily (ft3/s)

Cumulative (ft3/s-d)

Daily (ft3/s)

Cumulative (ft3/s-d)

Cumulative difference (ft3/s-d)

Balancing adjustment (ft3/s)

Col. 1

Col. 2

Col. 3

Col. 4

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

Col. 13

Col. 14

10/7/2015

524

10/10/2015

600

1,150

1,200

1,204

38,314

764

37,693

621

–50

10/8/2015

678

172

10/11/2015

850

900

950

951

39,265

771

38,464

801

–50

10/9/2015

800

10/12/2015

885

865

893

887

40,152

737

39,201

951

–50

10/10/2015

900

10/13/2015

900

850

–18

832

831

40,983

801

40,002

981

–50

10/11/2015

800

10/14/2015

812

938

–50

888

889

41,872

969

40,971

901

–50

10/12/2015

800

10/15/2015

830

920

–50

870

872

42,744

1,022

41,993

751

–50

10/13/2015

750

10/16/2015

792

958

–50

908

909

43,653

1,059

43,052

601

–50

10/14/2015

550

10/17/2015

573

1,177

–50

1,127

44,780

1097

44,149

631

–50

10/15/2015

550

10/18/2015

559

1,191

–50

1,141

1,142

45,922

782

44,931

991

–50

10/16/2015

450

10/19/2015

450

1,300

–50

1,250

1,248

47,170

978

45,909

1,261

–50

10/17/2015

450

10/20/2015

450

1,300

–50

1,250

1,249

48,419

939

46,848

1,571

–50

10/18/2015

400

10/21/2015

400

1,350

–50

1,300

1,292

49,711

1,012

47,860

1,851

–50

10/19/2015

600

10/22/2015

600

1,150

–50

1,100

1,093

50,804

1,013

48,873

1,931

–50

10/20/2015

600

10/23/2015

605

1,145

–50

1,095

1,093

51,897

1,043

49,916

1,981

–50

10/21/2015

650

10/24/2015

663

1,087

–50

1,037

1,034

52,931

1,054

50,970

1,961

–50

10/22/2015

600

10/25/2015

631

1,119

–50

1,069

1,065

53,996

985

51,955

2,041

–50

10/23/2015

600

10/26/2015

685

1,065

–50

1,015

1,009

55,005

829

52,784

2,221

–50

10/24/2015

600

10/27/2015

669

1,081

–50

1,031

1,028

56,033

798

53,582

2,451

–50

10/25/2015

667

10/28/2015

669

1,081

–50

784

56,817

684

54,266

2,551

–50

10/26/2015

700

469

10/29/2015

1,169

581

–50

531

381

57,198

54,266

2,932

–50

10/27/2015

1,750

4,355

10/30/2015

6,105

–50

57,198

54,266

2,932

–50

10/28/2015

1,750

5,702

10/31/2015

7,523

–50

57,198

54,266

2,932

–50

†A miscalculation of balancing adjustment occurred—values are reported as originally calculated.

36 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Table 9. New York City reservoir release design data from December 1, 2014, to October 31, 2015.—Continued

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, 2015. [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

11/28/2014

101

11/30/2014

11/29/2014

101

12/1/2014

11/30/2014

101

12/2/2014

12/1/2014

101

12/3/2014

12/2/2014

101

12/4/2014

12/3/2014

101

12/4/2014

101

12/5/2014

101

12/6/2014

12/7/2014

12/8/2014

12/9/2014

12/10/2014

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

12/1/2014

258

1,922

2,180

12/2/2014

258

1,992

2,250

12/3/2014

258

2,462

2,720

12/4/2014

258

2,702

2,960

12/5/2014

258

2,932

3,190

12/5/2014

12/6/2014

252

3,058

3,310

12/6/2014

12/7/2014

238

6,852

7,090

12/7/2014

12/8/2014

231

7,129

7,360

102

12/8/2014

12/9/2014

234

5,596

5,830

101

12/9/2014

12/10/2014

233

8,487

8,720

102

12/10/2014

12/11/2014

230

8,050

8,280

102

12/11/2014

12/12/2014

232

6,158

6,390

102

12/12/2014

12/13/2014

232

5,048

5,280

12/11/2014

102

12/13/2014

12/14/2014

232

4,338

4,570

12/12/2014

102

12/14/2014

12/15/2014

232

4,118

4,350

12/13/2014

102

12/15/2014

200

12/16/2014

232

200

3,828

4,260

12/14/2014

102

12/16/2014

264

12/17/2014

232

264

3,664

4,160

12/15/2014

102

12/17/2014

218

12/18/2014

232

218

4,100

4,550

12/16/2014

113

12/18/2014

257

12/19/2014

243

257

4,400

4,900

12/17/2014

130

12/19/2014

110

12/20/2014

260

110

3,930

4,300

12/18/2014

130

12/20/2014

12/21/2014

260

3,460

3,720

12/19/2014

125

12/21/2014

12/22/2014

255

3,175

3,430

12/20/2014

125

12/22/2014

12/23/2014

255

3,125

3,380

12/21/2014

125

12/23/2014

12/24/2014

255

3,535

3,790

12/22/2014

125

12/24/2014

12/25/2014

255

7,605

7,860

12/23/2014

125

12/25/2014

12/26/2014

255

11,245

11,500

Tables 1, 3–11, and 13–20 37

Directed

[Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

12/26/2014

12/27/2014

12/28/2014

127

12/29/2014

127

12/30/2014

127

128

1/1/2015

1/2/2015

1/3/2015

1/4/2015 1/5/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

12/24/2014

127

12/25/2014

128

12/26/2014

127

12/27/2014

12/28/2014

12/29/2014

12/30/2014

12/31/2014

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

12/27/2014

257

8,413

8,670

12/28/2014

258

6,692

6,950

12/29/2014

257

6,246

6,600

344

12/30/2014

257

344

5,429

6,030

348

12/31/2014

257

348

4,645

5,250

12/31/2014

300

1/1/2015

257

300

3,893

4,450

1/1/2015

1/2/2015

258

3,730

4,080

1/2/2015

304

1/3/2015

258

304

3,498

4,060

128

1/3/2015

1/4/2015

258

3,552

3,810

128

1/4/2015

1/5/2015

258

6,307

6,580

128

1/5/2015

647

1/6/2015

258

647

6,485

7,390

127

1/6/2015

577

1/7/2015

257

577

5,826

6,660

128

1/7/2015

1,043

1/8/2015

258

1,043

4,019

5,320

1/6/2015

128

1/8/2015

860

1/9/2015

258

860

3,432

4,550

1/7/2015

128

1/9/2015

1,014

1/10/2015

258

1,014

3,958

5,230

1/8/2015

128

1/10/2015

747

1/11/2015

258

747

4,875

5,880

1/9/2015

128

1/11/2015

110

1/12/2015

258

110

4,092

4,460

1/10/2015

128

1/12/2015

433

1/13/2015

258

433

3,409

4,100

1/11/2015

128

1/13/2015

519

1/14/2015

258

519

3,523

4,300

1/12/2015

128

1/14/2015

512

1/15/2015

258

512

3,050

3,820

1/13/2015

128

1/15/2015

1/16/2015

258

2,528

2,800

1/14/2015

119

1/16/2015

1/17/2015

249

2,401

2,650

1/15/2015

110

1/17/2015

1/18/2015

230

2,410

2,640

1/16/2015

108

1/18/2015

1/19/2015

228

2,205

2,480

1/17/2015

108

1/19/2015

207

1/20/2015

228

207

2,395

2,830

1/18/2015

107

1/20/2015

212

1/21/2015

227

212

2,361

2,800

38 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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, 2015.—Continued [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

1/21/2015

262

1/22/2015

173

1/23/2015

130

113

1/24/2015

110

1/25/2015

110

1/26/2015

110

1/27/2015

110

1/27/2015

108

1/28/2015

1/29/2015

1/30/2015

1/31/2015

2/1/2015 2/2/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

1/19/2015

111

1/20/2015

113

1/21/2015

113

1/22/2015

1/23/2015

1/24/2015

1/25/2015

1/26/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

1/22/2015

231

262

2,147

2,640

1/23/2015

233

173

1,824

2,230

1/24/2015

233

130

1,837

2,200

1/25/2015

233

1,717

1,950

1/26/2015

230

1,950

2,250

354

1/27/2015

230

354

1,666

2,250

401

1/28/2015

230

401

1,919

2,550

1/28/2015

391

1/29/2015

230

391

1,679

2,300

1/29/2015

419

1/30/2015

224

419

1,807

2,450

1/30/2015

285

1/31/2015

204

285

2,111

2,600

1/31/2015

2/1/2015

184

2,416

2,600

2/1/2015

2/2/2015

184

2,274

2,550

2/2/2015

469

2/3/2015

183

469

1,898

2,550

2/3/2015

348

2/4/2015

183

348

1,969

2,500

2/4/2015

475

2/5/2015

181

475

1,844

2,500

2/3/2015

2/5/2015

402

2/6/2015

180

402

2,168

2,750

2/4/2015

2/6/2015

351

2/7/2015

184

351

1,875

2,410

2/5/2015

2/7/2015

2/8/2015

186

2,254

2,440

2/6/2015

2/8/2015

2/9/2015

181

2,115

2,370

2/7/2015

2/9/2015

553

2/10/2015

183

553

1,444

2,180

2/8/2015

2/10/2015

440

2/11/2015

184

440

1,986

2,610

2/9/2015

2/11/2015

472

2/12/2015

184

472

2,034

2,690

2/10/2015

2/12/2015

516

2/13/2015

184

516

1,970

2,670

2/11/2015

2/13/2015

574

2/14/2015

184

574

1,972

2,730

2/12/2015

2/14/2015

543

2/15/2015

184

543

973

1,700

2/13/2015

2/15/2015

454

106

2/16/2015

184

560

1,056

1,800

Tables 1, 3–11, and 13–20 39

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Controlled releases Lake Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

2/16/2015

544

745

2/17/2015

478

851

2/18/2015

488

2/19/2015

2/20/2015

2/22/2015

2/23/2015

2/24/2015

2/25/2015

2/26/2015

2/27/2015 2/28/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

2/14/2015

2/15/2015

2/16/2015

2/17/2015

2/18/2015

2/19/2015

2/20/2015

2/21/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

2/17/2015

184

1,289

327

1,800

2/18/2015

184

1,329

187

1,700

851

2/19/2015

183

1,339

178

1,700

456

514

2/20/2015

184

970

646

1,800

539

461

2/21/2015

196

1,000

504

1,700

2/21/2015

381

443

2/22/2015

205

824

1,071

2,100

2/22/2015

174

443

2/23/2015

207

617

1,616

2,440

2/23/2015

483

762

2/24/2015

210

1,245

1,015

2,470

111

2/24/2015

496

426

2/25/2015

237

922

1,441

2,600

152

2/25/2015

506

248

2/26/2015

304

754

1,292

2,350

153

2/26/2015

460

195

2/27/2015

308

655

1,237

2,200

101

153

2/27/2015

469

142

2/28/2015

310

611

1,429

2,350

101

150

2/28/2015

142

3/1/2015

307

149

1,694

2,150

101

150

3/1/2015

142

3/2/2015

307

142

1,151

1,600

152

3/2/2015

3/3/2015

307

1,154

1,550

3/1/2015

101

153

3/3/2015

230

3/4/2015

310

243

1,147

1,700

3/2/2015

101

152

3/4/2015

213

3/5/2015

309

213

1,228

1,750

3/3/2015

101

152

3/5/2015

112

106

3/6/2015

309

218

1,373

1,900

3/4/2015

101

153

3/6/2015

100

3/7/2015

310

100

1,440

1,850

3/5/2015

101

153

3/7/2015

3/8/2015

310

1,590

1,900

3/6/2015

101

153

3/8/2015

106

3/9/2015

310

106

1,384

1,800

3/7/2015

101

153

3/9/2015

160

3/10/2015

310

160

1,430

1,900

3/8/2015

101

139

3/10/2015

177

3/11/2015

290

177

1,833

2,300

3/9/2015

3/11/2015

124

3/12/2015

223

124

2,853

3,200

3/10/2015

3/12/2015

160

3/13/2015

169

160

3,971

4,300

3/11/2015

3/13/2015

3/14/2015

147

4,600

4,800

40 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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, 2015.—Continued [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

3/12/2015

3/14/2015

3/13/2015

3/15/2015

3/14/2015

3/16/2015

3/15/2015

3/17/2015

3/16/2015

3/18/2015

3/17/2015

3/18/2015

3/19/2015

3/20/2015

3/21/2015

3/22/2015

3/23/2015 3/24/2015

Date

Amount

Date

New York City reservoirs

IERQ Bank releases

Powerplants

Computed uncontrolled

Total

Col. 9

Col. 10

Col. 11

Col. 12

Other

Col. 7

Col. 8

3/15/2015

149

6,351

6,500

3/16/2015

148

117

6,985

7,250

3/17/2015

148

7,463

7,700

160

3/18/2015

148

182

7,970

8,300

213

3/19/2015

148

213

7,489

7,850

3/19/2015

177

3/20/2015

148

177

6,575

6,900

3/20/2015

3/21/2015

148

5,584

5,750

3/21/2015

3/22/2015

148

4,524

4,690

3/22/2015

160

3/23/2015

148

160

3,942

4,250

3/23/2015

230

3/24/2015

146

252

3,632

4,030

3/24/2015

177

3/25/2015

146

177

3,367

3,690

3/25/2015

177

3/26/2015

148

177

3,345

3,670

3/26/2015

142

3/27/2015

146

240

4,454

4,840

3/25/2015

3/27/2015

530

3/28/2015

145

530

5,315

5,990

3/26/2015

3/28/2015

371

3/29/2015

146

371

4,853

5,370

3/27/2015

3/29/2015

3/30/2015

146

4,684

4,830

3/28/2015

3/30/2015

3/31/2015

146

4,894

5,040

3/29/2015

3/31/2015

4/1/2015

146

4,913

5,130

3/30/2015

4/1/2015

4/2/2015

146

5,003

5,220

3/31/2015

4/2/2015

4/3/2015

146

8,683

8,900

4/1/2015

4/3/2015

4/4/2015

146

19,854

20,000

4/2/2015

4/4/2015

160

4/5/2015

146

160

23,394

23,700

4/3/2015

4/5/2015

841

408

4/6/2015

146

1,249

16,205

17,600

4/4/2015

4/6/2015

1,422

851

4/7/2015

146

2,273

13,781

16,200

4/5/2015

4/7/2015

1,174

851

4/8/2015

146

2,025

17,229

19,400

4/6/2015

4/8/2015

899

851

4/9/2015

148

1,750

21,602

23,500

Tables 1, 3–11, and 13–20 41

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Controlled releases Lake Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

4/9/2015

880

851

4/10/2015

658

851

4/11/2015

373

4/12/2015

4/13/2015

4/15/2015

4/16/2015

4/17/2015

4/18/2015 4/19/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

4/7/2015

4/8/2015

4/9/2015

4/10/2015

4/11/2015

4/12/2015

4/13/2015

4/14/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

4/10/2015

148

1,731

21,021

22,900

4/11/2015

149

1,509

26,442

28,100

851

4/12/2015

146

1,224

18,830

20,200

475

851

4/13/2015

146

1,326

13,828

15,300

414

851

4/14/2015

146

1,265

12,089

13,500

4/14/2015

416

851

4/15/2015

153

1,267

11,080

12,500

4/15/2015

496

4/16/2015

160

502

9,018

9,680

4/16/2015

496

4/17/2015

159

496

7,285

7,940

4/17/2015

461

4/18/2015

160

461

6,649

7,270

4/18/2015

319

4/19/2015

160

319

5,771

6,250

4/19/2015

230

4/20/2015

160

230

5,190

5,580

4/20/2015

355

4/21/2015

160

357

7,723

8,240

4/21/2015

758

426

4/22/2015

160

1,184

12,556

13,900

4/20/2015

4/22/2015

540

461

4/23/2015

160

1,001

9,939

11,100

4/21/2015

4/23/2015

407

461

4/24/2015

164

868

8,348

9,380

4/22/2015

4/24/2015

167

461

4/25/2015

169

628

6,883

7,680

4/23/2015

4/25/2015

461

4/26/2015

160

461

6,049

6,670

4/24/2015

4/26/2015

337

4/27/2015

160

402

5,398

5,960

4/25/2015

4/27/2015

350

230

4/28/2015

160

580

4,890

5,630

4/26/2015

4/28/2015

401

284

4/29/2015

149

685

4,396

5,230

4/27/2015

4/29/2015

284

4/30/2015

160

284

4,046

4,490

4/28/2015

4/30/2015

390

5/1/2015

160

390

3,670

4,220

4/29/2015

5/1/2015

301

5/2/2015

166

301

3,343

3,810

4/30/2015

127

5/2/2015

266

5/3/2015

237

266

3,117

3,620

5/1/2015

153

5/3/2015

213

5/4/2015

283

213

2,844

3,340

5/2/2015

150

5/4/2015

248

5/5/2015

280

248

2,512

3,040

42 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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, 2015.—Continued [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

5/5/2015

5/6/2015

5/7/2015

150

5/8/2015

150

5/9/2015

150

5/10/2015

150

5/11/2015

150

5/11/2015

150

5/12/2015

292

162

5/13/2015

5/14/2015

306

5/15/2015

448

5/16/2015 5/17/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

5/3/2015

150

5/4/2015

150

5/5/2015

150

5/6/2015

5/7/2015

5/8/2015

5/9/2015

5/10/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

5/6/2015

280

120

2,330

2,730

5/7/2015

280

2,330

2,610

5/8/2015

280

106

2,204

2,590

5/9/2015

282

147

2,061

2,490

5/10/2015

282

1,896

2,190

101

5/11/2015

280

101

1,869

2,250

214

124

5/12/2015

280

338

1,782

2,400

5/12/2015

156

5/13/2015

280

245

1,595

2,120

5/13/2015

5/14/2015

280

1,510

1,790

5/14/2015

5/15/2015

294

1,411

1,740

153

5/15/2015

177

5/16/2015

283

177

1,390

1,850

181

5/16/2015

5/17/2015

310

1,695

2,040

319

5/17/2015

5/18/2015

449

123

2,488

3,060

427

336

5/18/2015

263

5/19/2015

468

281

2,141

2,890

193

5/19/2015

292

5/20/2015

325

292

2,223

2,840

5/18/2015

149

5/20/2015

275

5/21/2015

279

364

2,127

2,770

5/19/2015

149

5/21/2015

398

5/22/2015

282

487

1,791

2,560

5/20/2015

184

5/22/2015

288

5/23/2015

326

377

1,687

2,390

5/21/2015

203

5/23/2015

5/24/2015

359

1,511

1,870

5/22/2015

200

5/24/2015

137

5/25/2015

356

137

1,297

1,790

5/23/2015

200

5/25/2015

156

5/26/2015

338

156

1,428

1,940

5/24/2015

198

5/26/2015

219

5/27/2015

340

219

1,438

2,010

5/25/2015

198

5/27/2015

139

5/28/2015

353

174

1,853

2,380

5/26/2015

198

5/28/2015

177

106

5/29/2015

353

283

2,124

2,760

5/27/2015

163

198

5/29/2015

172

5/30/2015

163

191

218

1,938

2,510

5/28/2015

198

5/30/2015

232

5/31/2015

353

303

1,654

2,310

Tables 1, 3–11, and 13–20 43

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Controlled releases Lake Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

5/31/2015

148

6/1/2015

6/2/2015

223

6/3/2015

223

6/4/2015

101

232

6/5/2015

108

244

6/6/2015

110

244

6/6/2015

110

244

6/7/2015

110

244

6/8/2015

110

6/9/2015

6/10/2015

6/11/2015 6/12/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

5/29/2015

196

5/30/2015

198

5/31/2015

217

6/1/2015

102

6/2/2015

101

6/3/2015

6/4/2015

6/5/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

6/1/2015

351

148

2,531

3,030

6/2/2015

356

3,474

3,830

6/3/2015

382

3,735

4,200

6/4/2015

399

153

2,918

3,470

661

6/5/2015

398

750

2,312

3,460

269

6/6/2015

413

340

1,987

2,740

6/7/2015

432

1,828

2,350

6/7/2015

189

6/8/2015

434

278

1,628

2,340

6/8/2015

651

6/9/2015

434

704

2,462

3,600

6/9/2015

642

142

6/10/2015

434

784

3,412

4,630

244

6/10/2015

381

124

6/11/2015

434

505

3,341

4,280

110

244

6/11/2015

498

160

6/12/2015

434

658

2,468

3,560

110

244

6/12/2015

393

319

6/13/2015

434

712

2,114

3,260

110

244

6/13/2015

480

6/14/2015

434

480

2,146

3,060

110

244

6/14/2015

370

6/15/2015

434

370

2,226

3,030

6/13/2015

110

244

6/15/2015

435

6/16/2015

434

470

5,376

6,280

6/14/2015

110

243

6/16/2015

448

6/17/2015

433

519

5,288

6,240

6/15/2015

110

302

101

6/17/2015

315

6/18/2015

513

404

4,153

5,070

6/16/2015

138

398

101

6/18/2015

181

6/19/2015

637

270

3,283

4,190

6/17/2015

141

399

101

6/19/2015

173

6/20/2015

641

262

2,967

3,870

6/18/2015

141

398

101

6/20/2015

168

6/21/2015

640

203

3,797

4,640

6/19/2015

139

399

101

6/21/2015

474

106

6/22/2015

639

580

8,131

9,350

6/20/2015

139

399

101

6/22/2015

978

230

6/23/2015

639

1,208

7,023

8,870

6/21/2015

139

438

110

6/23/2015

1,133

142

6/24/2015

687

1,275

4,948

6,910

6/22/2015

139

500

110

6/24/2015

563

266

6/25/2015

749

829

4,172

5,750

6/23/2015

139

501

110

6/25/2015

456

372

6/26/2015

750

828

3,342

4,920

44 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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, 2015.—Continued [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

6/26/2015

292

124

6/27/2015

1,047

106

110

6/28/2015

1,072

501

110

6/29/2015

501

114

6/30/2015

139

501

145

271

608

190

500

851

7/2/2015

501

7/3/2015

501

7/4/2015

7/5/2015 7/6/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

6/24/2015

139

500

110

6/25/2015

139

500

110

6/26/2015

139

500

6/27/2015

139

6/28/2015

139

6/29/2015

6/30/2015

7/1/2015

Date

Amount

Date

New York City reservoirs

IERQ Bank releases

Powerplants

Computed uncontrolled

Total

Col. 9

Col. 10

Col. 11

Col. 12

Other

Col. 7

Col. 8

6/27/2015

749

416

3,115

4,280

6/28/2015

749

1,153

4,748

6,650

6/29/2015

749

1,161

7,340

9,250

1,081

160

6/30/2015

750

1,241

6,509

8,500

944

337

7/1/2015

754

1,281

12,465

14,500

7/1/2015

929

390

7/2/2015

785

1,319

15,996

18,100

7/2/2015

1,017

355

7/3/2015

1,069

1,372

11,759

14,200

190

7/3/2015

1,064

248

7/4/2015

1,541

1,312

9,147

12,000

1,299

187

7/4/2015

1,013

195

7/5/2015

1,987

1,208

8,905

12,100

1,502

150

7/5/2015

1,055

248

7/6/2015

2,153

1,303

6,744

10,200

500

1,499

149

7/6/2015

1,087

301

7/7/2015

2,148

1,388

5,334

8,870

500

1,497

139

7/7/2015

945

319

7/8/2015

2,136

1,264

4,460

7,860

500

1,494

139

7/8/2015

319

248

7/9/2015

2,133

567

3,850

6,550

7/7/2015

500

1,395

139

7/9/2015

292

248

7/10/2015

2,034

540

3,496

6,070

7/8/2015

500

1,095

139

7/10/2015

434

319

7/11/2015

1,734

753

3,593

6,080

7/9/2015

500

828

142

7/11/2015

415

7/12/2015

1,470

504

2,936

4,910

7/10/2015

500

699

150

7/12/2015

353

7/13/2015

1,349

353

2,658

4,360

7/11/2015

500

699

150

7/13/2015

456

7/14/2015

1,349

509

2,432

4,290

7/12/2015

498

698

150

7/14/2015

350

177

7/15/2015

1,346

527

2,457

4,330

7/13/2015

498

698

150

7/15/2015

242

7/16/2015

1,346

331

3,543

5,220

7/14/2015

498

1,378

150

7/16/2015

234

7/17/2015

2,026

323

2,481

4,830

7/15/2015

498

1,493

150

7/17/2015

426

7/18/2015

2,141

515

2,084

4,740

7/16/2015

500

1,491

150

7/18/2015

386

7/19/2015

2,141

421

2,258

4,820

7/17/2015

500

1,493

150

7/19/2015

348

106

7/20/2015

2,143

454

2,283

4,880

7/18/2015

500

1,493

150

7/20/2015

427

124

7/21/2015

2,143

551

2,166

4,860

7/19/2015

500

1,491

150

7/21/2015

254

7/22/2015

2,141

343

1,826

4,310

Tables 1, 3–11, and 13–20 45

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Controlled releases Lake Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

7/22/2015

187

7/23/2015

228

150

7/24/2015

374

1,499

150

7/25/2015

1,497

150

7/26/2015

381

1,493

150

291

1,493

138

189

1,490

7/28/2015

139

7/29/2015

139

7/30/2015

7/31/2015 8/1/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

7/20/2015

500

1,502

150

7/21/2015

500

1,502

150

7/22/2015

500

1,497

7/23/2015

500

7/24/2015

483

7/25/2015

7/26/2015

290

7/27/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

7/23/2015

2,152

276

1,702

4,130

7/24/2015

2,152

317

1,521

3,990

7/25/2015

2,147

409

1,334

3,890

256

7/26/2015

2,149

327

1,574

4,050

303

124

7/27/2015

2,130

427

3,793

6,350

7/27/2015

244

248

7/28/2015

2,024

492

3,324

5,840

7/28/2015

351

230

7/29/2015

290

1,632

581

2,477

4,980

110

7/29/2015

481

230

7/30/2015

1,789

711

2,070

4,570

1,488

110

7/30/2015

268

142

7/31/2015

1,737

410

1,873

4,020

1,494

110

7/31/2015

378

8/1/2015

1,743

467

1,730

3,940

139

1,497

110

8/1/2015

359

8/2/2015

1,746

394

1,520

3,660

139

1,496

110

8/2/2015

358

8/3/2015

1,745

411

1,444

3,600

139

1,371

110

8/3/2015

330

8/4/2015

1,620

419

1,271

3,310

8/2/2015

139

1,010

110

8/4/2015

336

8/5/2015

1,259

425

866

2,550

8/3/2015

139

729

110

8/5/2015

230

106

8/6/2015

978

336

876

2,190

8/4/2015

147

139

554

110

8/6/2015

205

106

8/7/2015

147

656

311

816

1,930

8/5/2015

233

139

497

110

8/7/2015

324

106

8/8/2015

233

513

430

764

1,940

8/6/2015

802

139

552

110

8/8/2015

250

8/9/2015

801

250

729

1,780

8/7/2015

797

139

552

110

8/9/2015

227

8/10/2015

797

298

681

1,780

8/8/2015

603

139

497

110

8/10/2015

162

8/11/2015

603

143

251

933

1,930

8/9/2015

139

501

110

8/11/2015

438

106

8/12/2015

750

544

1,746

3,040

8/10/2015

139

504

110

8/12/2015

277

106

8/13/2015

753

383

1,844

2,980

8/11/2015

139

506

110

8/13/2015

106

8/14/2015

755

196

1,289

2,240

8/12/2015

139

504

110

8/14/2015

243

8/15/2015

753

332

1,035

2,120

8/13/2015

139

504

110

8/15/2015

318

8/16/2015

753

389

898

2,040

8/14/2015

252

139

504

110

8/16/2015

412

106

8/17/2015

252

501

518

849

2,120

46 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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, 2015.—Continued [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

8/15/2015

501

139

503

110

8/17/2015

423

8/16/2015

597

141

503

110

8/18/2015

392

195

8/17/2015

493

141

503

110

8/19/2015

300

8/18/2015

722

139

503

110

8/20/2015

8/19/2015

139

503

110

8/21/2015

8/20/2015

139

503

110

8/21/2015

139

503

110

8/22/2015

139

501

8/23/2015

139

8/24/2015

139

8/25/2015

8/26/2015 8/27/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

8/18/2015

501

251

512

796

2,060

8/19/2015

597

157

587

739

2,080

106

8/20/2015

493

261

406

840

2,000

288

8/21/2015

722

288

2,600

3,640

287

8/22/2015

752

287

3,411

4,450

8/22/2015

293

177

8/23/2015

752

470

2,448

3,670

8/23/2015

232

8/24/2015

752

232

1,716

2,700

110

8/24/2015

228

8/25/2015

750

263

1,447

2,460

501

110

8/25/2015

179

8/26/2015

750

179

1,301

2,230

501

110

8/26/2015

118

8/27/2015

750

118

1,192

2,060

139

501

110

8/27/2015

144

8/28/2015

750

144

1,046

1,940

527

139

501

110

8/28/2015

192

8/29/2015

527

223

192

928

1,870

607

139

498

110

8/29/2015

286

8/30/2015

607

140

286

877

1,910

8/28/2015

706

139

500

110

8/30/2015

377

8/31/2015

706

448

853

2,050

8/29/2015

756

139

504

110

8/31/2015

476

124

9/1/2015

753

600

787

2,140

8/30/2015

855

139

613

104

9/1/2015

438

106

9/2/2015

856

544

700

2,100

8/31/2015

807

139

580

9/2/2015

455

124

9/3/2015

809

579

702

2,090

9/1/2015

770

139

545

9/3/2015

341

9/4/2015

774

412

654

1,840

9/2/2015

785

139

557

9/4/2015

222

9/5/2015

786

293

621

1,700

9/3/2015

899

139

674

9/5/2015

197

9/6/2015

903

197

600

1,700

9/4/2015

907

139

674

9/6/2015

286

9/7/2015

903

357

610

1,870

9/5/2015

976

139

718

9/7/2015

305

142

9/8/2015

947

447

656

2,050

9/6/2015

1,026

139

795

9/8/2015

352

142

9/9/2015

1,024

494

622

2,140

9/7/2015

1,198

139

979

9/9/2015

253

9/10/2015

1,208

324

678

2,210

9/8/2015

765

139

549

9/10/2015

9/11/2015

778

765

1,600

9/9/2015

402

139

396

9/11/2015

9/12/2015

402

223

782

1,500

Tables 1, 3–11, and 13–20 47

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Controlled releases Lake Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

9/12/2015

236

9/13/2015

9/14/2015

401

9/15/2015

396

9/16/2015

133

331

9/17/2015

594

9/18/2015

1,173

979

9/18/2015

1,198

101

1,007

9/19/2015

1,190

101

1,002

9/20/2015

1,300

101

9/21/2015

1,300

9/22/2015

1,300

9/23/2015 9/24/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

9/10/2015

293

139

408

9/11/2015

588

139

408

9/12/2015

139

404

9/13/2015

274

139

9/14/2015

232

139

9/15/2015

432

9/16/2015

782

9/17/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

9/13/2015

293

344

236

1,797

2,670

9/14/2015

588

1,483

2,120

9/15/2015

633

1,116

1,790

9/16/2015

274

356

989

1,710

119

9/17/2015

232

393

190

835

1,650

161

9/18/2015

432

122

250

826

1,630

128

9/19/2015

783

199

618

1,600

9/19/2015

144

177

9/20/2015

1,002

166

321

651

2,140

100

9/20/2015

9/21/2015

1,198

572

1,770

9/21/2015

9/22/2015

1,193

537

1,730

1,112

9/22/2015

9/23/2015

1,303

422

1,740

101

1,105

9/23/2015

9/24/2015

1,296

453

1,760

101

1,100

9/24/2015

9/25/2015

1,291

459

1,750

1,450

101

1,253

9/25/2015

9/26/2015

1,444

396

1,840

1,450

101

1,258

9/26/2015

211

9/27/2015

1,449

211

390

2,050

9/25/2015

1,450

101

1,256

9/27/2015

9/28/2015

1,447

373

1,820

9/26/2015

1,400

101

1,213

9/28/2015

9/29/2015

1,404

423

1,840

9/27/2015

1,400

101

956

9/29/2015

9/30/2015

1,147

2,250

3,410

9/28/2015

101

302

9/30/2015

10/1/2015

493

4,078

4,580

9/29/2015

101

302

10/1/2015

10/2/2015

483

3,297

3,780

9/30/2015

101

252

10/2/2015

10/3/2015

409

2,200

2,730

10/1/2015

101

152

10/3/2015

10/4/2015

309

1,971

2,280

10/2/2015

101

155

10/4/2015

10/5/2015

312

1,658

1,970

10/3/2015

101

155

10/5/2015

10/6/2015

312

1,515

1,880

10/4/2015

750

101

588

10/6/2015

10/7/2015

745

1,159

1,920

10/5/2015

1,050

101

886

10/7/2015

10/8/2015

1,043

1,124

2,180

48 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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, 2015.—Continued [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

10/8/2015

10/9/2015

10/10/2015

732

10/11/2015

674

10/12/2015

101

732

101

715

908

101

752

10/14/2015

1,127

101

10/15/2015

1,141

101

10/16/2015

1,250

10/17/2015 10/18/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

10/6/2015

1,200

101

1,038

10/7/2015

1,200

101

1,047

10/8/2015

950

101

794

10/9/2015

893

10/10/2015

832

101

10/11/2015

888

10/12/2015

870

10/13/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

10/9/2015

1,195

1,015

2,210

10/10/2015

1,204

986

2,190

10/11/2015

951

979

1,930

10/12/2015

887

1,013

1,900

10/13/2015

831

949

1,780

10/13/2015

10/14/2015

889

781

1,670

10/14/2015

10/15/2015

872

728

1,600

10/15/2015

10/16/2015

909

691

1,600

970

10/16/2015

10/17/2015

1,127

653

1,780

985

10/17/2015

177

10/18/2015

1,142

177

791

2,110

101

1,091

10/18/2015

10/19/2015

1,248

772

2,020

1,250

101

1,092

10/19/2015

10/20/2015

1,249

771

2,060

1,300

101

1,135

10/20/2015

10/21/2015

1,292

738

2,030

10/19/2015

1,100

101

936

10/21/2015

10/22/2015

1,093

737

1,830

10/20/2015

1,095

101

936

10/22/2015

10/23/2015

1,093

707

1,800

10/21/2015

1,037

101

877

10/23/2015

10/24/2015

1,034

696

1,730

10/22/2015

1,069

101

908

10/24/2015

10/25/2015

1,065

765

1,830

10/23/2015

1,015

101

852

10/25/2015

10/26/2015

1,009

921

1,930

10/24/2015

1,031

101

871

10/26/2015

10/27/2015

1,028

952

1,980

10/25/2015

101

627

10/27/2015

10/28/2015

784

1,053

1,850

10/26/2015

531

101

224

10/28/2015

10/29/2015

381

5,546

5,940

10/27/2015

101

149

10/29/2015

10/30/2015

306

12,094

12,400

10/28/2015

149

10/30/2015

10/31/2015

304

6,775

7,150

10/29/2015

102

150

10/31/2015

11/1/2015

311

4,729

5,040

10/30/2015

102

150

11/1/2015

11/2/2015

308

3,764

4,090

10/31/2015

102

150

11/2/2015

11/3/2015

308

3,173

3,540

Tables 1, 3–11, and 13–20 49

Directed

Controlled releases from power reservoirs

Segregation of flow, Delaware River at Montague, New Jersey

Directed

Controlled releases Lake Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

11/3/2015

11/4/2015

11/5/2015

152

11/6/2015

152

11/7/2015

101

152

11/8/2015

101

152

11/9/2015

101

153

11/9/2015

101

152

11/10/2015

101

152

11/11/2015

101

11/12/2015

11/13/2015

11/14/2015 11/15/2015

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

11/1/2015

102

150

11/2/2015

101

150

11/3/2015

150

11/4/2015

101

11/5/2015

101

11/6/2015

11/7/2015

11/8/2015

Date

Amount

Date

New York City reservoirs

Powerplants

Computed uncontrolled

Total

IERQ Bank releases

Directed

Other

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12

11/4/2015

308

2,743

3,140

11/5/2015

307

2,464

2,860

11/6/2015

305

2,266

2,660

11/7/2015

309

2,088

2,450

11/8/2015

309

1,898

2,260

11/9/2015

309

1,778

2,140

195

11/10/2015

309

195

1,666

2,170

11/10/2015

106

11/11/2015

310

106

3,094

3,510

11/11/2015

11/12/2015

309

10,702

11,100

11/12/2015

11/13/2015

309

7,855

8,260

153

11/13/2015

11/14/2015

310

6,501

6,900

101

152

11/14/2015

11/15/2015

309

5,072

5,470

102

152

11/15/2015

11/16/2015

310

4,329

4,650

101

153

11/16/2015

190

11/17/2015

310

190

3,750

4,250

150

11/17/2015

277

11/18/2015

305

277

3,348

3,930

11/16/2015

101

150

11/18/2015

229

11/19/2015

307

318

3,175

3,800

11/17/2015 11/18/2015 11/19/2015 11/20/2015 11/21/2015 11/22/2015 11/23/2015 11/24/2015 11/25/2015 11/26/2015 11/27/2015

0 0 0 0 0 0 0 0 0 0 0

101 101 101 101 101 101 101 101 101 101 101

150 152 152 152 152 152 153 153 150 152 152

56 56 56 56 56 56 56 54 57 56 56

11/19/2015 11/20/2015 11/21/2015 11/22/2015 11/23/2015 11/24/2015 11/25/2015 11/26/2015 11/27/2015 11/28/2015 11/29/2015

241 494 7 72 437 337 330 0 0 0 99

160 0 0 0 160 106 0 0 0 0 0

11/20/2015 11/21/2015 11/22/2015 11/23/2015 11/24/2015 11/25/2015 11/26/2015 11/27/2015 11/28/2015 11/29/2015 11/30/2015

0 0 0 0 0 0 0 0 0 0 0

307 309 309 309 309 309 310 308 308 309 309

401 494 7 72 597 443 330 0 0 0 99

4,372 7,447 5,594 4,729 4,034 3,518 3,200 2,962 2,772 2,631 2,482

5,080 8,250 5,910 5,110 4,940 4,270 3,840 3,270 3,080 2,940 2,890

0 0 0 0 0 0 0 0 0 0 0

50 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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, 2015.—Continued [Delaware River Master daily operations record. All provided measurements are the mean discharge in cubic foot per second for 24 hours.. 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 one day later; col. 4 = 24 hours beginning 1500 one day later; col. 5 = 24 hours beginning 0800 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; —, 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 Wallenpaupack

Rio Reservoir

Col. 5

Col. 6

Pepacton

Cannonsville

Neversink

Col. 1

Col. 2

Col. 3

Col. 4

Dec. 2014

2,617

3,461

1,578

Dec. 2014

1,838

Jan. 2015

2,338

3,692

1,536

Jan. 2015

10,138

Feb. 2015

1,755

2,663

1,227

Feb. 2015

11,237

Mar. 2015

2,157

2,924

1,339

Mar. 2015

1,303

Apr. 2015

1,513

2,011

1,081

Apr. 2015

May 2015

1,667

2,370

5,306

1,786

May 2015

June 2015

3,564

9,707

2,691

July 2015

290

13,526

38,164

Aug. 2015

6,987

4,313

20,296

Sept. 2015

27,358

3,704

Oct. 2015

22,487

Nov. 2015

Date

Amount

Date

New York City reservoirs

IERQ Bank releases

Powerplants

Computed uncontrolled

Total

Col. 9

Col. 10

Col. 11

Col. 12

Directed

Other

Col. 7

Col. 8

Dec. 2014

7,656

1,838

154,336

163,830

Jan. 2015

7,566

10,138

96,606

114,310

6,187

Feb. 2015

5,645

17,424

41,191

64,260

3,352

Mar. 2015

6,420

4,655

118,275

129,350

10,248

14,202

Apr. 2015

4,605

24,450

338,095

367,150

3,407

2,741

May 2015

1,715

7,747

6,148

63,259

78,910

June 2015

13,593

3,281

June 2015

15,962

16,874

112,774

145,610

4,581

July 2015

15,682

5,406

July 2015

290

55,981

21,088

132,541

209,900

3,410

Aug. 2015

8,676

2,090

Aug. 2015

6,986

21,033

10,766

39,485

78,270

22,767

2,734

Sept. 2015

4,640

1,348

Sept. 2015

26,924

2,286

5,988

22,767

57,960

100

3,127

21,078

1,794

Oct. 2015

104

372

Oct. 2015

23,071

2,928

476

58,115

84,640

3,031

4,545

1,682

Nov. 2015

2,731

1,669

Nov. 2015

9,258

4,400

118,136

131,800

Monthly totals

Tables 1, 3–11, and 13–20 51

52 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 11. Daily mean discharge, Delaware River at Montague, New Jersey (U.S. Geological Survey site number 01438500), for report year ending November 30, 2015. [Data from U.S. Geological Survey, 2019d. All values except the year’s total discharge volume are in cubic foot per second (ft3/s). The total volume discharged is given in cubic foot per second accumulated daily (ft3/s)-d. e, estimated; —, not applicable] Day

Dec. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

Nov. 2015

2,100

4,390

1,680e

1,630e

5,130

4,220

3,030

14,400

3,670

2,180

4,720

5,040

2,170

4,030

1,610e

1,480e

5,220

3,810

3,830

18,000

3,380

2,130

3,910

4,090

2,630

4,010

1,720e

1,420e

8,900

3,620

4,200

14,100

3,300

2,120

2,850

3,540

2,870

3,770

1,940e

1,640e

20,000

3,340

3,470

11,800

3,060

1,870

2,400

3,140

3,100

6,470

2,040e

1,680e

23,700

3,040

3,460

12,000

2,690

1,730

2,070

2,860

3,220

7,260

1,950e

1,800e

17,600

2,730

2,740

9,950

2,300

1,740

1,880

2,660

6,910

5,100e

2,060e

1,820e

16,200

2,610

2,350

8,660

2,030

1,910

1,940

2,450

7,170

3,800e

2,100e

1,840e

19,400

2,590

2,340

7,670

2,030

2,080

2,220

2,260

5,680

3,600e

1,780e

1,750e

23,500

2,490

3,600

6,370

1,870

2,180

2,270

2,140

8,490

3,400e

1,870e

1,800e

22,900

2,190

4,630

5,890

1,870

2,250

2,260

2,170

8,060

3,300e

2,230e

2,200e

28,100

2,250

4,280

5,910

2,000

1,630

2,010

3,510

6,230

3,700e

2,050e

3,000e

20,200

2,400

3,560

4,760

3,130

1,540

2,000

11,100

5,140

3,550e

1,850e

3,700e

15,300

2,120

3,260

4,220

3,070

2,700

1,880

8,260

4,450

3,400e

1,750e

4,600e

13,500

1,790

3,060

4,140

2,300

2,160

1,790

6,900

4,240

3,400e

1,700e

5,800e

12,500

1,740

3,030

4,190

2,170

1,830

1,740

5,470

4,150

2,950e

1,750e

6,000e

9,680

1,850

6,280

5,060

2,090

1,740

1,750

4,650

4,050

2,600e

1,950e

6,700e

7,940

2,040

6,220

4,670

2,160

1,680

1,960

4,250

4,430

2,750e

2,150e

7,610e

7,270

3,060

5,050

4,580

2,090

1,660

2,110

3,930

4,770

3,150e

2,040e

7,950e

6,250

2,890

4,170

4,660

2,110

1,630

2,020

3,800

4,190

3,050e

2,110e

6,930e

5,580

2,840

3,850

4,720

2,020

2,170

2,060

5,080

3,610

2,900e

2,310e

5,750e

8,240

2,770

4,590

4,700

3,680

1,810

2,030

8,250

3,330

2,750e

2,070e

4,690

13,900

2,560

9,280

4,170

4,480

1,760

1,830

5,910

3,280

2,650e

1,570e

4,250

11,000

2,390

8,800

3,980

3,700

1,770

1,800

5,110

3,680

2,550e

1,580e

4,030

9,380

1,870

6,830

3,820

2,710

1,800

1,730

4,940

7,660

2,400e

1,980e

3,690

7,680

1,790

5,670

3,730

2,460

1,770

1,830

4,270

11,200

2,250e

2,080e

3,670

6,670

1,940

4,850

3,890

2,230

1,860

1,930

3,840

8,460

2,100e

1,850e

4,840

5,960

2,010

4,210

6,180

2,060

2,070

1,980

3,270

6,770

2,050e

1,950e

5,990

5,630

2,380

6,530

5,660

1,940

1,840

1,850

3,080

6,500

2,100e

—

5,370

5,230

2,760

9,110

4,770

1,870

1,860

5,940

2,940

5,950

2,150e

—

4,830

4,490

2,510

8,360

4,340

1,910

3,500

12,400

2,890

5,170

1,850e

—

5,040

—

2,310

—

3,770

2,050

—

7,150

—

Total1

159,660

103,430

53,720

123,500

367,050

78,910

144,640

204,760

78,430

58,970

86,310

131,800

Mean2

5,150

3,336

1,919

3,984

12,235

2,545

4,821

6,605

2,530

1,966

2,784

4,393

1The year’s total is 1,591,180 cubic feet per second accumulated daily. 2The combined mean is 4,356 cubic feet per second.

Tables 1, 3–11, and 13–20 53 Table 13. Daily mean discharge, East Branch Delaware River at Downsville, New York (U.S. Geological Survey site number 01417000), for report year ending November 30, 2015. [Data from U.S. Geological Survey, 2019a. All values except the year’s total discharge volume are in cubic foot per second (ft3/s). The total volume discharge is given in cubic foot per second accumulated daily ([ft3/s]-d). —, not applicable] Day

Dec. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

Nov. 2015

101

522

124

132

103

107

101

693

124

132

103

107

101

618

125

132

103

105

101

100

525

125

132

103

105

101

105

489

126

135

103

105

102

105

487

125

135

103

105

103

104

487

125

135

104

105

103

104

486

125

135

104

105

100

105

486

125

136

104

105

486

125

135

104

105

487

126

135

104

105

487

126

136

104

105

486

127

135

104

106

105

487

127

135

104

106

105

487

127

135

105

115

487

128

113

105

128

487

129

103

106

105

128

487

132

104

106

105

127

487

132

105

106

105

127

487

132

105

127

487

133

105

106

105

127

487

132

103

106

105

127

487

132

103

106

104

100

127

487

132

103

106

104

101

127

412

132

103

106

104

101

127

306

129

103

106

104

100

128

215

132

103

107

104

100

127

139

132

103

106

103

—

126

124

132

103

106

103

—

173

124

131

104

107

103

—

124

132

—

107

—

Total1

2,569

2,447

2,039

2,194

1,608

2,424

3,482

13,540

3,984

3,578

3,252

3,145

116

437

128

119

105

Mean2

82.9

78.9

72.8

70.8

53.6

1The year’s total is 44,262 cubic feet per second accumulated daily. 2The combined mean is 120.6 cubic feet per second.

78.2

54 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 14. Daily mean discharge, West Branch Delaware River at Stilesville, New York (U.S. Geological Survey site number 01425000), for report year ending November 30, 2015. [Data from U.S. Geological Survey, 2019b. All values except the year’s total discharge volume are in cubic foot per second (ft3/s). The total volume discharge is given in cubic foot per second accumulated daily ([ft3/s]-d). —, not applicable] Day

Dec. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

Nov. 2015

102

147

104

126

161

103

145

104

125

157

201

863

1,550

588

262

135

208

2,060

1,420

534

139

136

103

147

103

124

104

148

103

124

152

209

2,720

1,060

558

141

138

151

219

2,540

774

675

143

138

106

147

102

123

109

148

102

123

150

232

2,180

570

679

597

138

150

235

1,850

510

759

905

109

146

102

139

123

151

232

1,630

555

813

1,050

141

110

145

111

145

122

151

239

1,440

547

969

1,060

146

117

151

240

1,140

503

547

807

148

113

145

152

237

882

503

394

735

151

145

152

235

720

513

407

687

172

12 13

116

145

152

236

713

508

409

735

157

117

144

159

235

712

505

407

711

152

119

143

154

240

718

502

401

762

149

120

137

172

250

1,440

502

396

976

151

121

120

299

302

1,550

502

342

996

149

144

119

313

407

1,550

502

587

1,090

148

155

118

194

407

1,560

504

997

1,090

148

153

118

152

407

1,560

503

1,020

1,140

151

146

118

151

408

1,550

505

1,020

952

151

144

120

102

174

415

1,560

505

1,120

936

152

149

120

100

188

447

1,550

502

1,120

895

150

120

102

100

188

506

1,550

502

1,120

923

150

152

120

116

100

188

504

1,550

502

1,260

874

151

147

120

119

102

188

502

1,550

502

1,260

891

151

148

119

120

130

188

502

1,550

502

1,260

639

150

148

118

120

158

188

505

1,550

502

1,220

220

150

148

118

126

180

187

510

1,550

502

961

133

151

148

112

—

173

186

510

1,550

502

319

140

151

148

104

—

154

186

514

1,560

503

326

133

151

148

104

—

187

—

1,550

619

—

134

—

Total1

4,004

4,045

2,860

2,986

3,212

5,472

10,294

46,448

18,681

22,468

20,896

4,445

Mean2

129

130

102

107

176

343

1,498

603

749

674

148

96.3

1The year’s total is 145,811 cubic feet per second accumulated daily. 2The combined mean is 396.4 cubic feet per second.

Tables 1, 3–11, and 13–20 55 Table 15. Daily mean discharge, Neversink River at Neversink, New York (USGS site number 01436000) for report year ending November 30, 2012. [Data from U.S. Geological Survey, 2019c. All values except the year’s total discharge volume are in cubic foot per second (ft3/s). The total volume discharge is given in cubic foot per second accumulated daily ([ft3/s]-d). —, not applicable] Day

Dec. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015 June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

Nov. 2015

577

106

426

106

187

106

157

105

137

105

133

105

130

105

130

106

130

108

130

108

137

110

140

109

140

110

143

110

144

110

144

110

100

144

110

100

144

111

100

144

110

144

111

144

111

102

144

111

107

144

111

106

144

111

107

144

110

108

144

111

107

144

110

206

116

110

—

365

105

111

—

313

105

111

—

105

110

—

Total1

1,597

1,521

1,235

1,286

1,116

1,869

3,303

5,000

3,378

2,679

1,721

1,656

110

161

109

Mean2

51.5

49.1

44.1

41.5

37.2

1The year’s total is 26,361 cubic feet per second accumulated daily. 2The combined mean is 72.0 cubic feet per second.

60.3

89.3

55.5

55.2

56 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 16. Daily mean discharge, Delaware River at Trenton, New Jersey (U.S. Geological Survey site number 01463500), for report year ending November 30, 2015. [Data from U.S. Geological Survey, 2019f. All values except the year’s total discharge volume are in cubic foot per second (ft3/s). The total volume discharge is given in cubic foot per second accumulated daily ([ft3/s]-d). e, estimated; —, not applicable] Day

Dec. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

4,650

9,810

4,000e

3,680e

12,900

9,570

6,120

28,400

7,480

4,900

8,580

3,800e

3,440e

12,800

8,890

10,500

39,800

5,880

7,620

3,700e

3,120e

12,500

8,400

11,900

34,600

6,990

9,930

3,600e

3,360e

16,900

7,800

12,300

6,970

10,100

3,800e

3,980e

31,500

7,290

10,200

7,750

11,500

3,600e

4,050e

31,700

7,000

Sept. 2015

Oct. 2015

Nov. 2015

3,980

8,020

13,300

6,880

3,760

8,790

10,400

6,480

3,750

8,440

8,920

26,800

6,170

3,720

7,540

8,200

22,900

5,980

3,640

6,700

7,110

8,400

21,300

5,320

3,450

5,560

6,330

11,300

11,800

3,600e

4,000e

26,400

6,720

7,470

18,800

4,810

3,650

4,900

6,000

12,400

10,100

3,700e

4,240e

25,100

6,250

6,180

16,500

4,330

3,420

4,430

5,710

16,900

8,000e

3,600e

4,250e

28,100

6,090

7,010

15,200

4,070

3,180

4,480

5,140

16,600

8,500e

3,400e

4,560e

30,800

5,990

8,740

15,300

4,160

3,780

5,080

4,770

16,200

8,000e

3,500e

6,430e

31,500

5,720

9,020

14,700

4,340

5,600

6,080

4,890

15,100

7,800e

3,600e

11,300e

33,100

5,270

8,450

12,800

6,000

5,600

6,020

5,730

12,400

7,500e

3,630e

13,400e

25,400

5,090

7,480

11,200

6,260

5,600

5,110

12,800

10,600

8,200e

3,500e

16,800

21,000

4,940

6,690

9,930

6,110

7,630

4,230

11,900

9,460

8,000e

3,620e

23,400

19,100

4,480

8,080

10,600

5,220

6,460

3,920

10,600

8,710

7,500e

3,620e

19,100

17,600

4,180

11,400

11,500

4,520

5,250

3,520

9,100

8,500

6,200e

3,830e

18,500

14,800

4,200

11,700

10,100

4,420

4,670

3,360

8,050

8,220

5,500e

4,340e

20,200

13,200

4,980

12,400

9,580

4,330

4,280

3,280

7,280

8,150

6,000e

4,600e

18,900

12,100

5,040

10,800

9,460

4,040

3,870

3,380

6,930

8,650

6,500e

4,720e

17,500

13,400

5,820

8,980

9,040

4,140

3,620

3,500

9,250

8,070

6,500e

5,430e

15,600

5,240

9,050

8,520

5,470

3,490

3,450

10,800

7,230

6,000e

5,590e

14,500

19,200

5,160

11,600

8,520

6,780

3,810

3,460

12,900

6,740

5,800e

4,300e

14,000

23,800

4,840

15,000

7,690

8,210

3,500

3,380

10,800

7,510

5,200e

3,460e

12,400

20,300

4,550

15,400

7,030

7,340

3,360

3,160

9,440

11,400

4,800e

3,960e

11,500

17,100

4,340

12,600

6,680

6,140

3,310

3,090

8,990

13,900

4,600e

4,250e

11,000

14,400

3,940

10,600

6,580

5,350

3,290

3,110

8,410

17,100

4,200e

3,960e

16,400

12,800

3,650

19,650

7,030

4,770

3,190e

3,250

7,560

14,300

4,500e

3,680e

16,200

11,900

3,710

11,800e

11,300

4,340

3,270

3,550e

6,740

12,500

4,200e

—

15,200

11,300

4,060

17,100

10,700

3,980

3,480

6,240e

6,400

11,500

4,000e

—

13,800

10,600

4,460

18,000

9,070

3,960

4,950

16,300

6,070

11,100

4,300e

—

12,700

—

4,530

—

8,530

4,160

—

20,000

—

Total1

321,680

221,240

110,390

357,510

586,900

172,200

314,620

440,160

165,560

124,560

175,330

250,420

Mean2

10,377

7,137

3,942

11,533

19,563

5,555

10,487

14,199

5,341

4,152

5,656

8,351

1The year’s total is 3,240,670 cubic feet per second accumulated daily. 2The combined mean is 8,857.7 cubic feet per second.

Table 17. Daily maximum and minimum specific conductance, Delaware River at Reedy Island Jetty, Delaware (U.S. Geological Survey site number 01482800), for report year ending November 30, 2015. [Data from U.S. Geological Survey, 2020h. Specific conductance measurements are in microsiemens per centimeter at 25 degrees Celsius. max, maximum; min, minimum; —, not applicable]

Day

Dec. 2014 Max

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Sept. 2015

Oct. 2015

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Nov. 2015

Min

Max

Min

17,300

9,800

12,900

6,050

18,100

7,450

21,100

12,500

13,600

4,520

12,600

5,340

13,300

5,200

10,900

3,240

14,000

4,550

19,600

9,090

19,600

11,600

16,900

11,000

19,000

10,400

11,100

4,850

17,900

8,730

22,900

13,300

14,300

4,470

13,500

5,130

11,700

5,120

10,200

2,230

13,400

4,700

19,800

8,860

21,500

12,900

16,700

10,800

20,500

10,900

12,800

4,790

15,400

6,740

21,200

12,500

12,400

4,180

13,300

5,440

13,300

5,560

9,270

1,870

13,500

5,100

16,800

8,910

22,300

15,100

16,100

10,100

17,800

10,000

14,000

5,020

17,000

7,170

21,200

11,800

10,900

3,470

12,300

5,190

12,000

5,130

8,580

1,640

12,800

5,160

17,500

8,880

23,300

14,800

16,400

9,720

17,600

9,750

10,100

3,570

13,600

6,750

19,300

11,600

3,440

12,100

4,950

11,300

5,120

7,970

1,450

12,600

5,140

18,600

10,100

22,000

13,900

16,100

9,760

19,000

10,500

9,320

2,850

17,100

6,880

19,000

10,600

9,240

2,700

10,500

4,780

11,300

4,900

6,800

1,380

13,000

5,210

17,200

10,000

20,000

12,700

16,600

9,580

18,100

9,860

9,950

3,220

17,100

7,530

19,300

9,320

8,830

2,280

11,800

4,870

10,900

5,070

5,620

1,320

14,900

5,640

17,500

10,100

20,000

12,500

15,700

9,750

20,800

10,900

10,700

2,440

16,800

7,340

17,700

10,100

7,740

2,220

11,600

5,120

11,000

5,040

4,580

1,220

16,200

6,780

16,700

9,990

20,800

11,900

17,200

9,200

22,400

10,800

12,100

2,430

17,200

9,780

18,700

9,480

9,360

2,200

11,100

5,130

8,090

4,820

6,680

1,250

16,500

6,870

17,700

9,470

19,900

12,200

17,200

9,730

19,900

8,810

9,860

1,780

19,900

10,200

17,900

9,270

8,680

2,030

11,100

5,090

8,930

4,330

7,190

1,190

16,100

7,750

16,600

9,530

19,200

12,100

19,300

10,600

17,500

8,380

11,100

2,660

22,200

11,700

17,500

8,940

6,200

1,730

10,300

5,370

9,090

4,360

7,880

1,280

13,300

7,100

16,800

9,150

19,500

12,200

18,600

10,900

16,600

8,060

12,800

4,110

21,500

12,400

15,000

6,680

4,710

1,390

10,400

5,200

10,500

4,190

8,420

1,340

13,800

5,910

17,400

9,520

20,100

12,800

19,800

11,300

18,200

7,750

14,200

4,680

19,100

11,800

13,800

6,180

5,070

1,320

10,500

4,750

8,920

3,960

8,610

1,440

14,900

6,100

16,200

9,450

21,100

13,100

17,800

11,000

18,200

7,190

16,000

6,820

21,500

11,400

13,900

5,080

5,270

1,080

13,500

4,750

11,000

3,990

8,680

1,650

15,000

6,300

15,300

8,860

19,800

13,000

13,800

8,660

19,300

7,820

18,300

8,730

17,400

8,870

12,800

4,160

5,280

1,060

13,800

5,660

11,600

4,290

9,300

1,770

15,000

6,410

15,000

8,460

19,900

12,700

16,100

8,920

19,100

9,240

17,900

8,240

22,300

9,960

12,000

3,130

5,920

1,000

13,000

5,980

11,000

4,320

9,130

1,730

14,900

6,360

15,900

8,300

19,100

12,500

16,600

8,490

19,300

9,200

17,900

8,110

24,600

12,900

14,500

3,140

6,040

1,000

12,200

5,500

9,150

4,170

10,300

1,840

14,200

6,330

16,600

8,490

19,700

12,400

19,000

8,490

17,100

7,810

19,000

8,600

25,200

13,300

11,400

2,940

5,760

937

13,400

5,740

11,800

4,500

8,900

2,040

13,900

6,340

16,900

8,820

20,600

12,400

17,100

9,570

16,900

7,400

16,600

6,820

24,700

13,500

10,500

2,530

5,600

1,080

14,300

6,220

10,800

4,330

7,640

1,910

13,700

6,700

16,600

9,140

21,700

12,600

17,000

9,530

19,600

7,950

15,100

6,330

20,000

12,300

10,500

2,510

5,390

1,190

14,000

6,470

10,400

4,230

7,610

1,910

14,100

7,710

16,400

9,200

19,700

13,500

15,600

9,000

19,800

8,920

14,600

6,150

22,000

12,700

11,400

2,370

5,190

1,080

13,200

6,120

10,400

4,190

8,840

2,010

13,200

7,210

19,200

9,370

19,300

11,500

17,600

8,640

18,700

9,650

15,100

6,220

22,100

12,200

11,000

2,490

4,130

1,080

13,100

6,640

8,790

3,740

9,940

2,170

15,000

6,750

19,100

11,100

20,700

11,500

16,100

8,730

20,400

9,490

14,700

6,490

22,500

12,500

9,450

2,310

2,080

942

12,300

6,420

9,290

3,920

11,000

2,350

15,100

7,180

19,500

11,400

20,500

12,000

15,500

8,280

19,300

9,610

14,700

6,870

22,300

12,300

5,790

2,080

2,750

721

14,400

6,270

9,660

3,500

13,000

3,010

17,600

7,790

19,900

10,800

21,100

13,000

17,100

7,840

16,500

9,070

13,500

6,170

22,800

13,400

7,770

2,170

5,560

742

11,800

6,050

11,100

3,730

13,800

3,750

17,400

7,900

20,400

11,900

20,400

13,400

15,700

7,850

14,000

7,850

12,700

6,070

22,000

13,400

8,190

2,150

5,360

885

12,700

5,780

11,500

4,400

15,900

5,630

18,600

7,850

20,300

12,500

20,000

12,900

15,900

7,640

14,200

7,460

16,700

7,660

21,900

13,300

6,760

2,060

7,560

1,600

12,400

4,760

13,300

5,180

15,500

4,230

19,600

8,340

20,400

12,300

20,300

13,400

15,600

7,600

13,500

6,770

16,000

7,950

21,200

12,100

8,500

2,070

9,620

1,730

11,700

4,400

11,000

4,960

14,700

4,240

19,600

8,960

19,300

12,000

21,800

14,300

15,600

7,710

13,300

6,680

17,200

7,680

—

12,100

2,090

11,300

3,480

12,600

4,590

10,000

4,030

14,900

4,880

19,900

9,360

19,300

12,100

20,100

13,100

15,900

7,960

14,300

6,410

16,900

8,040

—

13,600

4,050

12,400

4,220

13,600

5,260

10,200

4,040

15,000

4,360

20,500

9,680

19,100

11,500

17,500

12,000

16,800

8,640

14,300

6,510

13,900

7,030

—

13,200

4,740

—

13,600

5,280

—

13,300

4,110

20,000

9,140

—

18,100

11,700

—

Mean

17,823

8,740

14,120

5,756

20,193

10,664

14,128

5,946

7,595

1,993

12,274

5,427

10,711

4,477

10,005

2,401

15,558

6,849

17,920

9,976

20,310

12,765

16,713

9,233

Max

22,400

10,900

19,000

8,730

25,200

13,500

22,900

13,300

14,300

4,520

14,400

6,640

13,300

5,560

15,900

5,630

20,500

9,680

20,400

12,500

23,300

15,100

19,800

11,300

Min

13,300

6,410

9,320

1,780

13,600

6,740

5,790

2,060

2,080

721

10,300

4,400

8,090

3,500

4,580

1,190

12,600

4,550

15,000

8,300

17,500

11,500

13,800

7,600

Tables 1, 3–11, and 13–20 57

11 12

[Record provided by Kimberly-Clark Chester Operations. Concentrations are in milligrams per liter. max, maximum; min, minimum; *, missing data; —, not applicable]

Day

Dec. 2014

Jan. 2015

Feb. 2015

Mar. 2015

Apr. 2015

May 2015

June 2015

July 2015

Aug. 2015

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

115

205

161

139

221

189

125

205

174

105

104

221

161

105

124

102

205

148

105

113

189

161

118

102

161

148

113

102

148

113

221

161

102

174

161

Sept. 2015

Oct. 2015

Nov. 2015

Max

Min

Max

Min

Max

Min

161

124

161

103

148

102

114

161

102

103

161

102

135

124

102

148

113

102

113

124

116

148

116

124

113

111

161

148

102

124

102

161

148

113

124

113

161

148

102

136

102

154

124

107

116

136

121

148

102

116

126

136

124

102

107

147

148

124

107

170

189

148

107

136

135

118

116

196

136

124

126

136

135

124

126

158

174

148

170

243

107

205

174

158

243

147

205

174

158

243

116

205

174

158

196

116

205

174

148

196

136

205

161

148

102

211

196

174

161

135

124

322

126

—

148

102

300

183

—

205

211

126

—

174

—

Mean

140

122

134

114

128

167

106

Max

139

115

205

174

221

189

205

124

322

196

161

Min

58 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Table 18. Daily maximum and minimum chloride concentrations, Delaware River at Chester, Pennsylvania (U.S. Geological Survey site number 01477050), for report year ending November 30, 2015.

Tables 1, 3–11, and 13–20 59 Table 19. Daily mean dissolved-oxygen concentrations, Delaware River at Benjamin Franklin Bridge at Philadelphia, Pennsylvania (U.S. Geological Survey site number 01467200), from April 1 to November 30, 2015. [Data from U.S. Geological Survey [USGS], 2020d. Concentrations are in milligrams per liter. As of January 20, 2020, USGS site number 01467200 is located at the Delaware River at Penn's Landing, Philadelphia, Pennsylvania. —, not applicable]

Day

Apr.

May

June

July

Aug.

Sept.

Oct.

Nov.

12.1

9.1

6.0

7.1

5.6

5.3

6.0

8.5

11.9

9.0

5.8

7.3

5.5

5.1

6.3

8.5

11.9

9.0

5.6

7.4

5.5

5.0

7.0

8.4

11.9

8.9

5.7

7.3

5.5

5.0

7.3

8.4

11.9

8.8

5.9

7.2

5.4

5.2

7.6

8.2

11.9

8.7

5.8

7.2

5.3

7.6

8.1

11.6

8.5

5.9

7.2

5.4

5.2

7.5

8.0

11.5

8.4

6.2

7.2

5.4

5.3

7.3

8.1

11.5

8.3

6.5

7.1

5.3

5.4

7.2

8.0

11.5

8.2

6.9

6.8

5.2

5.3

7.1

7.9

11.4

8.2

7.4

7.0

5.1

4.9

7.0

7.9

11.5

8.1

7.7

7.1

4.8

4.6

6.9

7.7

11.5

8.1

7.8

7.2

4.8

4.5

6.8

8.0

11.5

8.1

7.6

7.3

4.9

4.8

6.8

8.6

11.3

8.0

7.2

7.1

5.0

6.9

8.7

11.0

7.8

6.9

7.0

5.1

5.0

6.9

8.8

10.7

7.5

6.7

7.0

5.2

5.0

7.0

8.8

10.4

7.2

6.3

7.1

5.2

5.0

7.1

8.8

10.2

6.9

5.8

7.2

5.1

5.0

7.2

8.8

9.8

6.7

5.6

7.3

5.1

5.0

7.4

8.9

9.1

6.5

5.3

7.4

5.0

5.2

7.6

9.0

8.9

6.1

5.4

7.6

5.1

5.3

7.5

9.2

8.7

6.1

5.7

7.9

5.2

5.4

7.6

9.6

8.5

6.1

6.2

8.0

5.2

5.5

7.6

9.8

8.5

6.2

6.6

8.1

5.3

5.7

7.6

9.9

8.5

6.3

6.7

7.9

5.4

6.0

7.7

9.8

8.6

6.3

6.6

7.6

5.4

6.2

7.7

9.8

8.8

6.2

6.6

7.3

5.4

6.2

7.7

9.8

8.9

6.0

6.9

5.3

6.1

7.6

9.7

9.1

6.0

7.1

6.5

5.4

5.8

7.9

9.8

—

6.1

—

5.9

5.4

—

8.3

—

Mean

10.5

7.5

6.4

7.2

5.2

5.3

7.2

8.8

Maximum

12.1

9.1

7.8

8.1

5.6

6.2

7.9

9.9

Minimum

8.5

6.0

5.3

5.9

4.8

4.5

6.0

7.7

60 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Table 20. Daily mean dissolved-oxygen concentration, Delaware River at Chester, Pennsylvania (U.S. Geological Survey site number 01477050), from April 1 to November 30, 2015. [Data from U.S. Geological Survey, 2020f. Concentrations are in milligrams per liter. *, Missing data; —, not applicable]

Day

Apr.

May

June

July

Aug.

Sept.

Oct.

Nov.

11.8

9.3

6.2

5.6

5.7

6.4

7.8

11.9

8.9

6.6

6.0

5.5

5.4

7.0

7.7

11.5

8.8

6.7

6.0

5.7

5.2

8.0

7.6

11.6

8.9

6.9

6.3

5.8

5.2

8.0

7.5

11.6

9.0

6.1

6.5

5.7

5.8

8.1

7.4

11.3

9.0

5.9

6.7

5.8

8.0

7.3

11.1

8.7

6.0

6.7

5.9

5.8

7.5

7.3

11.3

8.6

6.7

6.6

6.0

5.7

7.3

7.4

11.1

8.1

7.1

6.5

5.8

5.7

7.2

7.5

10.6

7.8

7.2

6.6

5.6

7.2

7.7

10.6

7.7

7.1

6.6

5.8

5.3

7.3

7.7

10.6

7.6

7.1

6.4

5.5

5.2

7.3

7.7

8.0

7.1

6.2

5.4

5.3

7.2

7.9

10.9

8.0

7.1

6.3

5.5

5.6

7.2

8.3

10.9

8.1

6.4

6.2

5.7

7.3

8.6

11.1

8.0

6.7

6.6

5.8

7.5

8.7

11.0

7.4

6.1

6.7

5.9

5.8

7.5

8.9

11.0

7.3

5.8

6.6

5.9

5.8

7.7

9.0

10.8

6.9

5.1

6.5

5.9

5.7

8.0

8.9

10.3

6.7

5.2

6.6

5.8

5.6

8.4

8.8

9.6

6.7

4.9

6.5

5.4

5.9

8.3

8.6

9.6

6.8

4.7

6.7

5.5

6.2

8.3

8.6

9.5

7.1

5.1

6.8

5.6

6.3

8.3

8.8

9.5

7.2

4.9

6.9

5.5

6.2

8.3

8.8

9.5

7.5

5.2

6.8

5.6

6.5

8.3

8.7

9.5

7.7

5.2

6.7

5.7

6.8

8.2

8.6

9.4

7.2

5.7

6.4

5.8

7.0

8.3

8.6

9.4

6.6

6.3

6.0

5.9

6.8

8.6

8.4

9.4

6.6

6.0

5.9

5.8

6.7

8.5

8.4

9.3

6.2

5.7

5.9

6.6

8.2

8.8

—

5.8

—

5.7

5.8

—

7.9

—

Mean

10.5

7.7

6.1

6.4

5.7

5.9

7.8

8.2

Maximum

11.9

9.3

7.2

6.9

6.0

7.0

8.6

9.0

Minimum

9.3

5.8

4.7

5.7

5.4

5.2

6.4

7.3

References Cited 61

References Cited Delaware River Basin Commission [DRBC], 2022, Delaware Estuary Water Quality Monitoring Program: DRBC web page, accessed July 5, 2022, at https://www.nj.gov/drbc/ programs/quality/boat-run.html. 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: West Trenton, N.J., and Wilmington, Del., Delaware River Basin Commission and Partnership for the Delaware Estuary, prepared by University of Delaware, 195 p., accessed 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., 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 Open-File 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=2014-12-01&end_date= 2015-11-30. 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= 2014-12-01&end_date=2015-11-30.

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=2014-12-01&end_date= 2015-11-30. 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_ %20module=sw&period=&begin_%20date=2014-12- 01&end_date=2015-11-30. 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=html&site_no= 01460440&referred_%20module=sw&period=&begin_ %20date=2014-12-01&end_%20date=2015-11-30. 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?referred_ module=sw&cb_00060=on&format=html&site_no= 01463500&referred_%20module=sw&period=&begin_ %20date=2014-12-01&end_%20date=2015-11-30. 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. 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. U.S. Geological Survey [USGS], 2020c, Temperature and water: USGS web page, accessed April 10, 2020, at https://www.usgs.gov/special-topics/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://nwis.waterdata.usgs.gov/ pa/nwis/dv?cb_00010=on&cb_00010=on&cb_00095= on&cb_00095=on&cb_00300=on&cb_00300=on&cb_ 00400=on&cb_00400=on&format=html&site_no= 01467200&legacy=&referred_module=qw&period=&begin_ date=2015-04-01&end_date=2015-11-30.

62 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 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/monitoringlocation/01467200/#parameterCode=00300&timeSeriesId= 121396&startDT=2014-12-01&endDT=2015-11-30.

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=2014-12- 01&endDT=2015-11-30.

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_00095=on&cb_ 00400=on&format=html&site_no=01477050&legacy= &referred_module=sw&period=&begin_date=2014-12- 01&end_date=2015-11-30.

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=2014-12-01&end_date=2015-11-30.

Glossary 63

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 to the design of releases from the New York City reservoirs to meet the Montague flow objective at Montague, New Jersey. The balancing adjustment calls for more water to be released when previous directed releases (or 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. The balancing adjustment, based on provisional data, 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 adjusted flow objective. 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 June 1, 2015, Flexible Flow Management Program (appendix 1):

• L1—Spill mitigation when New York City combined reservoir storage is in the spill mitigation (L1) storage zone. • L2—Conservation releases when New York City combined reservoir storage is in the normal (L2) storage zone. • L3—Conservation releases when New York City combined reservoir storage is in the drought watch (L3) storage zone. • L4—Conservation releases when New York City combined reservoir storage is in the drought warning (L4) storage zone. • L5—Conservation releases 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. Discharge mitigation release These are releases designed to help mitigate the effects of spilling immediately below the Delaware River Basin reservoirs. The 2015 Flexible Flow Management Program details the releases in section 7 (appendix 1). 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. This includes the out-of-basin transfer of water by New Jersey from the Delaware River through the Delaware and Raritan Canals.

64 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015 Excess quantity As defined by the Decree, the excess quantity of water is “equal to 83 per cent [sic] of the amount by which the estimated consumption during such year is less than the City’s estimate of the continuous safe yield during such year of all its sources obtainable without pumping.” The excess quantity shall not exceed 70 billion gallons, and the seasonal period for release of the excess quantity begins on June 15 and concludes on the following March 15. 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 the 1954 Decree of the Supreme Court of the United States and unanimously agreed to by the Decree Parties (Delaware, New Jersey, New York, New York City, and Pennsylvania). Refer to appendix 1. Index gaging stations Specific sites on tributaries of the upper Delaware River where systematic observations of gage height and discharge are made. These stations are primarily used during the directed-releases season to help estimate inflows of surface water to the upper Delaware River. Interim Excess Release Quantity An Interim Excess Release Quantity (IERQ) was defined in the Flexible Flow Management Program (appendix 1) and made available for interim periods from June 1, 2014, to May 31, 2015, and from June 1, 2015, to May 31, 2016. 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) and New York City’s current estimate of continuous safe yield of the New York City water supply system of 1,290 million gallons per day, obtainable without pumping. During the 2015 report year, the IERQ available for release was 15,468 cubic feet per second accumulated daily. 6,045 cubic feet per second accumulated daily of the IERQ is incorporated into the releases tables to enhance base releases from the New York City Delaware River Basin reservoirs.

Interim Excess Release Quantity Extraordinary Needs Bank From the 2015 Flexible Flow Management Program (appendix 1)—“In addition to the hydrologic criteria described in Section 2.5.6.A. [sic] of the Water Code and subject to other provisional uses of the IERQ as provided herein, the Decree Parties [Delaware, New Jersey, New York State, New York City, and Pennsylvania], 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 bank all or a portion of the IERQ 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 so banked shall be deducted from the IERQ. 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. These stations are used year-round in 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 is also referred to as the minimum full-operating level.

Glossary 65 Montague flow objective In section 3a of the June 1, 2015, Flexible Flow Management Program (appendix 1), “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.” Rate of flow Mean discharge for a specified 24-hour period, measured 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. Reservoir-controlled releases Controlled releases from reservoirs passed through outlet valves in the dams or turbines in powerplants. These releases do not include spillway overflow at the reservoirs.

Salt front The salt front is the 250 parts per million isochlor, or line of equal chloride concentration, in the Delaware River estuary. One part per million is one part of solute (in this case, chloride) per one 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 based on 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 11 and a 25-hour day on November 4. Trenton flow objective In section 3b of the June 1, 2015, Flexible Flow Management Program (appendix 1), “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 regulations are 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 Rio Reservoir, but including spillway overflow at these dams.

66 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 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 1-year successor to the Flexible Flow Management Program that ended on May 31, 2015. A copy of the agreement, which is in effect through May 31, 2015, is included as appendix 1 here; the original page numbers were removed to avoid confusion. The agreement is also available through the U.S. Geological Survey website (https://webapps.usgs.gov/odrm/documents/ffmp/ FFMP_2015_Agreement1.pdf).

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 67

Agreement of the Parties to the 1954 U.S. Supreme Court Decree Effective June 1, 2015 1.

FLEXIBLE FLOW MANAGEMENT PROGRAM a.

Program History

Current Program

Criteria for Flexible Flow Management Program Modification

DIVERSIONS a.

New York City

New Jersey

FLOW OBJECTIVES a.

Montague Flow Objective

Trenton Equivalent Flow Objective

RELEASES a.

Conservation Releases from the City Delaware Basin Reservoirs

Excess Release Quantity

Interim Excess Release Quantity

Interim Excess Release Quantity Extraordinary Needs Bank

DROUGHT MANAGEMENT a.

Drought Watch

Drought Warning

Drought Emergency

New Jersey Diversion Offset Bank

Entry and Exit Criteria

Balancing Adjustment

HABITAT PROTECTION PROGRAM a.

Applicability and Management Objectives

Controlled Releases for Habitat Protection Program

DISCHARGE MITIGATION PROGRAM

SALINITY REPULSION

DWARF WEDGEMUSSELS

68 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

10.

LAKE WALLENPAUPACK

11.

RECREATIONAL BOATING

12.

ESTUARY AND BAY ECOLOGICAL HEALTH

13.

WARM WATER AND MIGRATORY FISH

14.

MONITORING AND REPORTING a.

Temperature

IERQ

15.

REASSESSMENT STUDY

16.

PERIODIC EVALUATION AND REVISION

17.

TEMPORARY SUSPENSION OR MODIFICATION

18.

RESERVATIONS

19.

EFFECTIVE DATE

20.

RENEWAL AND REVISION

21.

REVERSION

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 69

An Agreement, consented to by the Parties (the State of Delaware (Del.), the State of New Jersey (N.J.), the State of New York (N.Y.), the Commonwealth of Pennsylvania (Pa.), and the City of New York (NYC or City); hereafter Decree Parties) to the Amended Decree of the U.S. Supreme Court in New Jersey v. New York, 347 U.S. 995 (1954), (hereafter Decree) that succeeds for a one-year period the Flexible Flow Management Program (FFMP) that terminated on May 31, 2015, for managing diversions and releases under the Decree. The Decree Parties hereby agree to support all provisions of this Agreement. 1.

FLEXIBLE FLOW MANAGEMENT PROGRAM a.

Program History

On September 26, 2007, the Decree Parties unanimously agreed to implement a Flexible Flow Management Program (FFMP) for operation of the three New York City reservoirs in the Delaware River Basin. The FFMP was designed to provide a more natural flow regime and a more adaptive means than the previous operating regime for managing releases and diversions from New York City’s Pepacton, Cannonsville, and Neversink Reservoirs (City Delaware Basin Reservoirs). The FFMP addresses competing needs and uses including safe and reliable water supplies to serve the needs of more than 17 million people; drought management; flood mitigation; protection of the cold water fishery; a diverse array of habitat needs in the mainstem river, estuary, and bay; and salinity repulsion. The Decree, which resolved an interstate dispute related to these reservoirs, made no provision for spill mitigation, conservation, and ecological releases. The Initial Implementation Cycle of the FFMP was from October 1, 2007 to May 31, 2011. The conceptual framework of the FFMP eliminated the reservoir storage “banks” previously relied upon for habitat protection purposes and instead based releases on reservoir storage levels, resulting in larger releases when water is abundant and smaller releases when storage is at or below Normal levels. The discharge mitigation component of the FFMP was intended to reduce the likelihood that the three reservoirs could be full and spilling coincident with a major storm or thaw. The FFMP was designed to provide an adaptive framework which allows increased flexibility for program modifications and adjustments compared to the previous operating regime. This framework provides a tool to inform program-management decisions as new scientific and technical information is accumulated. During the Initial Implementation Cycle, notable revisions to the FFMP included the following: Temporary Modifications – Such modifications have been made in support of increased reservoir releases for maintenance, inspection, and repair of the Delaware Aqueduct and appurtenant infrastructure; increased releases for supplemental flood mitigation; emergency thermal releases for protection of the cold water fishery; and enhanced summer releases through the use of Interim Excess Release Quantity (IERQ) Extraordinary Needs Banks.

70 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Permanent Changes – Such changes have been made to the FFMP agreement to allow for increased reservoir releases for habitat protection needs in late May and early September; to clarify the meaning of “temporary” releases schedules during periods of maintenance and repair of City Delaware Basin Reservoirs and appurtenant infrastructure; to address the issue of storage zone bouncing; and to allow the use of up to 100 percent of the water equivalent of snow pack for the calculation of combined storage to determine reservoir releases rates. b.

Current Program

The original FFMP, effective October 1, 2007 and its subsequent modifications on December 10, 2008 and February 14, 2011, expired on May 31, 2011. Collectively, these programs are referred to herein as the Initial Implementation Cycle FFMP. The subsequent FFMP Agreement, effective June 1, 2011 and expired on May 31, 2012, was a one-year program unanimously approved by the Decree Parties and built upon the framework of the previous FFMP agreements. The FFMP Agreement effective June 1, 2012 and expiring on May 31, 2013 was a one-year extension of the June 1, 2011 Agreement and was unanimously approved by the Decree Parties. The 2013 FFMP and 2014 FFMP were also extensions of the June 1, 2011 Agreement. The current FFMP is also an extension of the June 1, 2011 Agreement and incorporates the edits from the previous three extensions of the 2011 Agreement with no additional program modifications other than dates. This Agreement, the 2015 FFMP, shall be effective from June 1, 2015 to May 31, 2016. Although several limited studies and evaluations have been conducted to assess the effectiveness of selected elements of the Initial Implementation Cycle FFMP and suggest opportunities for its improvement, some of which were incorporated in the previous extensions of the Agreement, additional analyses and studies are needed prior to the Decree Parties reaching a longer term agreement for managing diversions and releases under the Decree. The current FFMP is informed by impact assessments of previous FFMP Agreements, information and experience accumulated during the previous programs, and input from various stakeholder groups and the public. The current FFMP differs from the Initial Implementation Cycle FFMP mainly in the following key elements: Use of additional tables (i.e., schedules) of reservoir releases rates for the City Delaware Basin Reservoirs, developed on the basis of Forecast-based Available Water (FAW) not needed contemporaneously for New York City’s water supply; Use of new releases tables that replace releases tables utilized in the Initial Implementation Cycle FFMP; Use of new rule curves that replace rule curves utilized in the Initial Implementation Cycle FFMP; Use of New York City’s Operations Support Tool (OST) to guide selection of appropriate releases tables;

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 71

Releases rates based, in part, upon recommendations provided jointly by the New York State Department of Environmental Conservation and the Pennsylvania Fish and Boat Commission Joint Fisheries Paper (January 12, 2010); Drought condition releases rates (L3-L5) that are consistent among the releases tables; Modifications to New Jersey’s diversion during drought conditions and the establishment of a Diversion Offset Bank for New Jersey; Incorporation of the seasonal releases design of the FFMP Temporary Summer 2010 fisheries program; Redirection of the IERQ used to support the seasonal flow increment, which was intended to increase the Montague flow objective from 1,750 cfs to 1,850 cfs between June 15 and September 15; Use of 3.91 billion gallons (6,045 cfs-days) of IERQ to increase the base releases rates in the tables; Reattachment of the Montague flow objective with the location of the Delaware Estuary salt front (salinity vernier); Modified spill mitigation program that endeavors to maintain reservoir levels at the Conditional Seasonal Storage Objective (CSSO), creating a high probability of maintaining ten (10) percent void spaces from September 1, 2015 through March 15, 2016; and Postponement of a water-resources reassessment study until more information is available. The additional releases tables and use of OST will facilitate the redirection of spilled water to managed water to benefit downstream interests when water in the City Delaware Basin Reservoirs is forecasted to be available for purposes other than New York City’s water supply. The June 1, 2012 FFMP Agreement differed from the 2011 FFMP Agreement in the following elements: Section, 1.b., Current Program, was updated to reflect the June 1, 2012 FFMP one-year extension; The dates were revised to correspond to the effective term of the June 1, 2012 FFMP Agreement; Additional units of measurement for water volume were provided; and The State of Delaware had one party signing the current FFMP Agreement, as opposed to two. The June 1, 2013 FFMP Agreement was an extension of the June 1, 2011Agreement and incorporated the changes from the 2012 FFMP Agreement.

72 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

The June 1, 2014 FFMP Agreement was an extension of the June 1, 2011 Agreement and incorporated the changes of the 2012, and 2013 Agreements. The term Conditional Storage Objective (CSO) was changed to Conditional Seasonal Storage Objective (CSSO) in the 2014 Agreement. The June 1, 2015 FFMP Agreement is an extension of the June 1, 2011 Agreement and incorporates the changes of the 2012, 2013 and 2014 Agreements. c.

Criteria for Flexible Flow Management Program Modification

In reviewing proposed modifications to address the purposes of the FFMP, as provided in Sections 16 and 17 herein, the Decree Parties will consider criteria that may include, without any particular priority, and not limited to, the following: i.

Decree Party equity

ii.

Net benefits and costs to environmental and economic resources

iii.

Source and sustainability of water available to support modification and the environmental or economic resource(s)

iv.

Habitat types—with naturally-occurring habitats receiving consideration over man-made habitats

Scientific basis for modification

vi.

Impacts to drought management, water supply and flood mitigation, including but not limited to: 1) frequency, duration and seasonal timing of the various levels of drought; and 2) frequency, duration, levels of storage, diversions, releases and flows

vii.

Extent to which the diversions and the Montague minimum basic rate of flow provided in the Decree are met

viii.

Potential impacts to water quality, existing National and State Pollution Discharge Elimination System permits and the assimilative capacity of the Delaware River

ix.

Ease and practicability of operation

Consistency with adaptive management principles

xi.

Applicability and implementation of water conservation practices

xii.

Impacts to salinity

The Decree Parties agree to evaluate these parameters as well as potential additional parameters, when considering modifications to this program.

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 73

DIVERSIONS a.

New York City

In accordance with Section III.A. of the Decree, and subject to the limitations provided herein, at no time during the twelve-month period, commencing June 1, 2015 shall the aggregate total quantity of water diverted by the City, divided by the number of days elapsed since May 31, 2015 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. For this 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 5, 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.

Until the State of New Jersey builds and utilizes one or more reservoirs to store waters of the Delaware River or its tributaries for the purpose of diverting the same to another watershed, or purchases or leases reallocated water or new storage from an existing or new storage facility, 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.

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 watershed without compensating releases shall not exceed an average of 100 mgd during any calendar year.

74 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

FLOW OBJECTIVES a.

Montague Flow Objective

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 (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 5 of this Agreement 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 6, 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 for salinity management 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 70 cfs 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 5 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, and minimum compensating releases shall be made by the City of New York from its reservoirs in the upper Delaware Basin.

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 75

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 6 below. b.

Excess Release Quantity

For the period of the current program, the Decree Parties agree to use the Excess Release Quantity, as defined in the Decree, in support of an Interim Excess Release Quantity (IERQ) as defined in Paragraph c. below. c.

Interim Excess Release Quantity

For the period of the current program, an IERQ equivalent to 10.0 billion gallons (15,468 cfs-days) shall be provided as computed in the Initial Implementation Cycle of the FFMP 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 NYC’s estimate of continuous safe yield of the NYC water supply system at that time, of 1,290 mgd obtainable without pumping. For the current program, 3.91 billion gallons (6,045 cfs-days) of the IERQ is incorporated in the releases tables to enhance base releases from the City Delaware Basin Reservoirs. The IERQ balance of 6.09 billion gallons (9,423 cfs-days) is reserved and may be used for additional releases to meet the Trenton Equivalent Flow Objective or to establish an Extraordinary Needs Bank as provided for in Section d., below. Upon request by the Lower Basin States or DRBC, NYC shall release from the IERQ, water in sufficient quantities to maintain a flow at Trenton of 3,000 cfs during basinwide Normal conditions for the period commencing on June 15, 2015 and continuing through March 15, 2016 (seasonal period). The IERQ required to be released in any seasonal period shall not exceed 70 billion gallons. In releasing the IERQ, NYC shall not be required to release at rates exceeding the capacity of its release works. NYC shall make releases from the IERQ as provided above until May 31, 2016 or until the aggregate quantity of the IERQ is exhausted, whichever occurs first. 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 bank all or a portion of the IERQ 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

76 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

so banked shall be deducted from the IERQ. Any unused Extraordinary Needs Bank water shall be returned to IERQ.

DROUGHT MANAGEMENT Figure 1 defines six 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 two additional curves that subdivide the Normal storage zone into three zones (L1, L2-a, and L2-b). The three drought management rule curves are described below. The two Normal conditions rule curves are described in Section 6. 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, 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. c.

Drought Emergency (L5)

The operation level formerly named Drought in accordance with the rule curves included in DRBC Resolution No. 83-13 and Docket D-77-20 (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. 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, and shall not exceed 100 mgd, except when the Basin is in Drought Emergency, when said diversion shall not exceed a daily running average of 85 mgd commencing on the day such Drought

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 77

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 Diversion Offset Bank, not to exceed 1.84 billion gallons (2,850 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 Agreement, during basinwide Drought Watch, Drought Warning, and Drought Emergency conditions. The additional 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 30 mgd during Drought Warning; and up to 20 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 Agreement, establish the additional increments for New Jersey’s diversion as incorporated herein. This Diversion Offset Bank shall be created by selective reduced levels of releases in the L2 storage zones from Cannonsville Reservoir, during the periods June 1 to August 31, 2015 and May 21 to May 31, 2016 as provided in Tables 4g (L2-a and L2-b) and 4f (L2a). Water saved by these reductions shall be accumulated in the Diversion Offset Bank and shall be available to offset New Jersey’s incremental increases in diversions through the Delaware and Raritan Canal during drought periods. If the accumulated incremental increased diversions by New Jersey, at any time, exceed the available water in the Diversion Offset Bank, the Lower Basin Reservoirs in Pennsylvania will provide the additional water to offset New Jersey’s increased diversions. At no time shall New Jersey’s accumulated incremental increased diversions exceed 1.84 billion gallons (2,850 cfs-days). Any portion of the ERQ/IERQ or uncompensated storage in the downbasin reservoirs in Pennsylvania or in the New York City Delaware Basin Reservoirs which may be used to offset the increased New Jersey drought diversions provided herein is for the term of this agreement only and shall not be cited as precedent of any intention to provide such in future agreements. Releases from the Diversion Offset Bank shall be at the direction of New Jersey in consultation with DRBC, 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 Diversion Offset Bank or the Lower Basin Reservoirs to offset New Jersey’s incremental increases in diversions through the Delaware and Raritan Canal 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 from Lower Basin Reservoirs to meet the current Trenton flow objective.

78 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

The River Master’s office will maintain the ongoing accounting for releases made from this bank. At no time during the releases year commencing June 1, 2015 shall releases from the Diversion Offset Bank exceed the unused balance of the bank. The Diversion Offset Bank shall terminate automatically on June 1, 2016; provided that it may be terminated at an earlier date and the remaining balance added to the IERQ, by agreement of the Decree Parties. Figure 1 New York City Delaware System Usable Combined Storage (Cannonsville, Pepacton, and Neversink Reservoirs)

Table 1 Interstate Operation Formula for Diversions and Flow Objectives NYC Diversion (mgd)

NJ Diversion (mgd)

Montague Flow Objective (cfs)

Trenton Flow Objective (cfs)

Normal (L1, L2)

800

100

1,750

3,000

Drought Watch (L3)

680

100

1,650

2,700

Drought Warning (L4)

560

100

1,550

2,700

Drought Emergency (L5)

520

1,100-1,650*

2,500-2,900*

NYC Storage Condition

Severe Drought

(to be negotiated depending upon conditions)

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

_____________________________________________________________________

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 79

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

7-day average location of Salt Front*, River Mile** Upstream of R.M. 92.5 Between R.M. 87.0 and R.M. 92.5 Between R.M. 82.9 and R.M. 87.0 Downstream of R.M. 82.9

Flow objective, cubic feet per second at: Montague, NJ Trenton, NJ*** Dec- MaySeptDecMaySeptApr. Aug. Nov. Apr. Aug. Nov. 1,600 1,650 1,650 2,700 2,900 2,900 1,350 1,600 1,500 2,700 2,700 2,700 1,350 1,600 1,500 2,500 2,500 2,500 1,100 1,100 1,100 2,500 2,500 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 70 cfs to account for bypass flows via Yardley and the Point Pleasant Pumping Station is greater than the Trenton Flow Objective listed above. Table 3 Schedule of Releases (cfs) during Drought Operations

80 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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. 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. Additionally, during Drought Warning, the amount of the conservation releases (L4) from the City Delaware Basin Reservoirs that is greater than the basic conservation releases rates as set forth in Table 1 of Docket D-77-20 (Revised) shall be considered as directed releases for the purpose of calculating the balancing adjustment.

HABITAT PROTECTION PROGRAM a. Applicability and Management Objectives The overall management goal of the Habitat Protection Program (HPP) is to protect the cold water 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.

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 81

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 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.

82 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Plate 1 Extent and Protection Level of the Cold Water Ecosystem

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 83

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), 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-7720 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 will 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 stream 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. 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. Tables 4b through 4g present the releases tables under Normal conditions for pre-determined amounts of FAW. 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.

84 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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.

Figure 2 New York City Delaware System Usable Individual Storage (Cannonsville, Pepacton, and Neversink Reservoirs)

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 85

Table 4a Schedule of Releases (cfs) during Normal Conditions Base Releases with no Forecast-based Available Water (FAW)

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

Table 4b Schedule of Releases (cfs) during Normal Conditions Releases with 10 mgd Forecast-based Available Water (FAW)

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

86 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Table 4c Schedule of Releases (cfs) during Normal Conditions Releases with 20 mgd Forecast-based Available Water (FAW)

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

Table 4d Schedule of Releases (cfs) during Normal Conditions Releases with 35 mgd Forecast-based Available Water (FAW)

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

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 87

Table 4e Schedule of Releases (cfs) during Normal Conditions Releases with 50 mgd Forecast-based Available Water (FAW)

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

Table 4f Schedule of Releases (cfs) during Normal Conditions Releases with 75 mgd Forecast-based Available Water (FAW)

* Indicates storage zone not present at this time period; release is entry in cell below. + Second entry after slash indicates reduction in release rate for New Jersey Diversion Offset Bank.

88 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Table 4g Schedule of Releases (cfs) during Normal Conditions Releases with 100 mgd Forecast-based Available Water (FAW)

* Indicates storage zone not present at this time period; release is entry in cell below. + Second entry after slash indicates reduction in release rate for New Jersey Diversion Offset Bank.

DISCHARGE MITIGATION PROGRAM

In order to enhance flood mitigation provided by the City Delaware Basin Reservoirs, NYC agrees to establish a Conditional Seasonal Storage Objective (CSSO) rule curve in Figure 2. 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. For the duration of the current program 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 ten (10) percent void spaces from September 1, 2015 through March 15, 2016 to 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, snow water equivalent in the watershed ranging from 50 percent to 100 percent as appropriate, and the current usable reservoir storage. Based on any projected seven (7) day storage surplus, new release rates, above the FAW table releases in effect, are calculated and spread over the upcoming 7-day period, within the limitations of the release works for each reservoir.

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 89

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. For the period June 16 through April 30, 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. During the period October 1 through April 30: a. Fifty percent (50%) of the water equivalent of snow pack in the watersheds above the reservoirs shall be included in the determination of combined and individual reservoir usable storage in relation to Figures 1 and 2. b. If, as a result of the combination of current snow pack and predicted meteorological conditions, in the opinion of the New York City Department of Environmental Protection (NYCDEP) any reservoir is anticipated to spill within a period of seven (7) days, then upon notification by NYCDEP to the Decree Parties, the River Master, and DRBC, NYCDEP may, in consideration of possible downstream impacts and the stage and discharge thresholds given in Section 6.a. and Table 5, herein, include up to one hundred percent (100%) of the water equivalent of snow pack in the watersheds above the reservoirs in the determination of combined and individual reservoir usable storage in relation to Figures 1 and 2, unless and until any Decree Party shall notify the NYCDEP, the River Master, and DRBC of its objection to such inclusion. As soon as practicable, NYCDEP shall transition back to the fifty percent (50%) snow pack water equivalent criterion with notification to the Decree Parties, the River Master, and DRBC. ii. For the period May 1 through June 15, Zones L1-a and L1-b shall not be applicable in accordance with Figure 2, and discharge mitigation releases shall be made in accordance with Zone L1-c as provided in Figure 2 and Tables 4a through 4g. iii. The NYCDEP and the New York State Department of Environmental Conservation (NYSDEC) reservoir releases managers, upon mutual agreement,

90 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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 Delaware River at Hale Eddy is 11.0 feet. Accordingly, Zone L1discharge mitigation releases will not be made from Cannonsville Reservoir when the river stage for the West Branch Delaware River at Hale Eddy is above 9.0 feet, or is forecasted to be above 9.0 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 13.0 ft. 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 11.0 ft. or is forecast to be above 11.0 ft. 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 13.0 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 12.0 feet, or is forecast to be above 12.0 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 L2 releases in Tables 4a through 4g, or lower. 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

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 91

period of three days at Cannonsville and Pepacton Reservoirs, and two days at Neversink Reservoir. x. Modifications to the program necessary to accommodate emergencies, maintenance and repair operations or short-term needs are addressed herein in Section 17, Temporary Suspension or Modification. Table 5 Maximum Combined Discharge Rates Reservoir

Maximum Combined Discharge Rate (cfs)

Neversink 3,400 Pepacton 2,400 Cannonsville 4,200 ____________________________________ 8.

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 78-20 (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.

DWARF WEDGEMUSSELS The Decree Parties will consider any modifications to the current program that may be necessary to avoid taking, harming, or adversely affecting dwarf wedgemussels based upon information from the U.S. Fish and Wildlife Service (USFWS). Studies currently underway by the USFWS and the USGS may inform such modifications, as new information becomes available. These studies will attempt to quantify any relationship between surface water discharge and groundwater flow and temperature at known dwarf wedgemussel sites in the upper Delaware during low flow conditions.

10.

LAKE WALLENPAUPACK The Decree Parties and the DRBC will consider any modifications to the Lake Wallenpaupack operations plan (DRBC Resolution 2002-33) proposed by the operators of Lake Wallenpaupack, if deemed feasible.

92 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

11.

RECREATIONAL BOATING The Decree Parties and the DRBC will review and evaluate proposed reservoir releases programs for supporting recreational boating activities in the upper basin, if deemed feasible.

12.

ESTUARY AND BAY ECOLOGICAL HEALTH The Decree Parties and the DRBC will review and evaluate available data during the implementation of the current program and will consider any modifications that may be necessary to maintain the ecological health of the Delaware Estuary and Bay including that of oysters, shellfish and endangered species. The focus of this FFMP element includes the upper Delaware Estuary, lower Delaware Estuary, and Delaware Bay, and such modifications shall be considered in accordance with the criteria described in Section 1.c.

13.

WARM WATER AND MIGRATORY FISH The Decree Parties and the DRBC will review and evaluate available information on the effects of implementation of the current program on warm water fishes that are found in the Delaware River and will consider any modifications to conserve native species of special concern and migratory species.

14.

MONITORING AND REPORTING During the term of this Agreement, temperature monitoring and accounting of IERQ use will be conducted as follows: a.

Temperature: During the one-year term of the current Agreement, NYSDEC shall monitor water temperatures within the stream reaches defined and categorized in Section 6. NYSDEC will submit to the Decree Parties and to the DRBC, by April 30, 2016, a scientific report summarizing the observed temperatures and assessing biological implications with respect to the stated management goal and defined protection levels of the HPP.

IERQ: In order to assess the extent to which the downbasin parties’ rights in the IERQ are preserved under this Agreement, the River Master shall maintain an accounting of the quantity of daily releases from the NYC reservoirs in accordance with Tables 4a through 4g which are attributable to the 3.91 billion gallons (6,045 cfs-days) IERQ component of the tables.

Appendix 1. Agreement of the Parties to the 1954 Decree of the Supreme Court of the United States, Effective June 1, 2015 93

15.

REASSESSMENT STUDY Decisions on the conduct of a water resources reassessment study will be informed by experience gained during the operation of the current program.

16.

PERIODIC EVALUATION AND REVISION The Decree Parties agree that during the entire effective period of this Agreement, as monitoring, reporting, and evaluation may show to be appropriate, the provisions of this Agreement specifying triggers for, and quantities of, releases may be revised through an adaptive management process to further enhance the overall natural resource and economic benefits derived from the releases from the City Delaware Basin Reservoirs. Any resultant action taken shall be subject to the unanimous approval of the Decree Parties. New York City will continue to collaborate with the Decree Parties in the development of the OST as a flow management tool.

17.

TEMPORARY SUSPENSION OR MODIFICATION From time to time, the Decree Parties and the DRBC may agree that 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 the DRBC may estimate probabilities and risks associated with such temporary suspensions or modifications. Any resultant action taken, other than modifications to the releases as provided below, shall require the unanimous approval of the Decree Parties. The City shall provide reasonable advance notification to the Decree Parties, River Master and DRBC of any planned long-term cessation of diversions and/or changes in releases due to emergencies, maintenance and repair operations including possible tunnel shut downs. The City shall establish the scope of work and the work schedule for maintenance and repair operations and shall inform the Decree Parties and the DRBC of such plans as early as practicable. In the absence of unanimous approval of a modified releases schedule as may be required for purposes of necessary maintenance and repair, the City, acting in cooperation with the NYSDEC, will make releases to the best of its ability for the duration of the maintenance or repair 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 NYSDEC, provided, however, that releases shall be sufficient to meet the Montague flow objective in effect at the time.

94 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

18.

RESERVATIONS Nothing contained herein shall be deemed to constitute a waiver or modification of, or limitation on, the Decree Parties rights under the Decree. This Agreement shall not be cited as precedent of any intention to waive or modify or limit such rights. The Decree Parties have authorized certain actions, including but not limited to discharge mitigation releases, in this Agreement to assist in mitigating the impacts of flooding immediately below the NYC Delaware Basin Reservoirs. By incorporating flood mitigation as an objective and taking the actions provided herein, the Decree Parties do not create or assume any duties or obligations regarding flood mitigation or in any way modify any such duties or obligations that may be otherwise prescribed by law.

19.

EFFECTIVE DATE This Agreement shall take effect upon unanimous approval of the Decree Parties and shall expire on May 31, 2016, unless renewed as provided for in Section 20, or if the expiration date is revised.

20.

RENEWAL AND REVISION This Agreement may be revised only through the unanimous written agreement of the Decree Parties. This Agreement, and any unanimously agreed to revisions, may be renewed for an additional one-year period beginning June 1, 2016 by unanimous written agreement of the Decree Parties. If this Agreement is not renewed for an additional oneyear period, prior to May 31, 2016, the Decree Parties agree to enter into good faith negotiations to determine a course of action in the absence of such renewal, as provided in Section 21, below.

21.

REVERSION Upon any failure by all Decree Parties to continue this Agreement, and any revisions to this Agreement, in accordance with Section 20, operations shall revert to those provided in DRBC Docket D-77-20 CP (Revised).

Appendix 2. Temporary Modification to the Drought Entry Criteria Under the Flexible Flow Management Program 95

Appendix 2. Temporary Modification to the Drought Entry Criteria Under the Flexible Flow Management Program An agreement for a temporary modification to the 2014 Flexible Flow Management Program (available at https://webapps.usgs.gov/odrm/documents/ffmp/FFMP_2014_Agreement.pdf) was signed by the Parties of the Amended Decree of the U.S. Supreme Court in New Jersey v. New York, 347 U.S. 995 (1954). The agreement revised the method for reservoir storage calculations and was in effect March 13–April 15, 2015. A copy of the agreement is included as appendix 2 here and is also available through the U.S. Geological Survey website (https://webapps.usgs.gov/odrm/documents/ffmp/2015_Temporary_ Modification.pdf).

96 Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

Temporary Modification to the Drought Entry Criteria under the Flexible Flow Management Program In order to best account for the current hydrological state of the Delaware basin and prevent the adverse impacts associated with entry and then rapidly exiting a Delaware Basin Drought Watch, one half of the snow-water-equivalent (SWE) shall be added to the actual combined storage in the NYC Delaware Basin reservoirs in determining when storage conditions enter zone L3 (equivalent to the DRBC Drought Watch line). This modified calculation will be in effect for the period beginning March 13, 2015 and ending April 15, 2015: The drought entry criteria in Section 5.e of the FFMP shall temporarily be modified to include fifty (50) percent of the SWE in the watersheds above the three New York City Reservoirs in the determination of combined and individual reservoir usable storage in relation to Figures 1 and 2. The City will periodically verify and adjust the quantity of SWE using data from the National Weather Service’s National Operational Hydrologic Remote Sensing Center and from snow pack surveys performed by DEP staff. Approvals _________________________ City of New York Date

_________________________ State of New York Date

_________________________ State of Delaware Date

_________________________ State of New Jersey Date

_____________________________________ Commonwealth of Pennsylvania Date

res23-0015_fig02.01

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, 2014–November 30, 2015—OFR 2024–1010

ISSN 0196-1497 (print) ISSN 2331-1258 (online)

https://doi.org/10.3133/ofr20241010

Report of the River Master of the Delaware River for the Period December 1, 2014–November 30, 2015

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