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NOTICE - January 13, 2017 - The NY Water Science Center is transitioning to a new data management software package. While you may not have noticed this transition, some sites may have problems or delays in being updated. We are actively monitoring these conditions and are resolving them as quickly as possible. Thank you for your patience!



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LOCATION.--Lat 42°00'11", long 75°23'01" referenced to North American Datum of 1983, Delaware County, NY, Hydrologic Unit 02040101, on left bank at downstream side of bridge on County Highway 56 in Hale Eddy, and 9 mi upstream from confluence of East and West Branches near Hancock.
DRAINAGE AREA.--595 mi2.
PERIOD OF RECORD.--November 1912 to current year.
REVISED RECORDS.--WSP 871: 1916. WDR NY-82-1: Drainage area.
GAGE.--Water-stage recorder. Datum of gage is 946.46 ft above NGVD of 1929. Prior to Sept. 8, 1928, nonrecording gage at same site and datum.
REMARKS.--Subsequent to October 1963, entire flow from 454 mi2 drainage area controlled by Cannonsville Reservoir (station 01424997). Part of flow diverted for New York City municipal supply. Remainder of flow (except for conservation releases and spill) impounded for release during periods of low flow in the lower Delaware River basin, as directed by the Delaware River Master. Water Year 2014: Records good. Water Year 2015: Records good except those for estimated daily discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, since construction of Cannonsville Reservoir in 1963, 43,400 ft3/s, June 28, 2006, gage height, 19.10 ft; minimum discharge, 17 ft3/s, Oct. 20, 1963; minimum gage height, 1.03 ft, Aug. 4, 1936.
EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Oct. 10, 1903, reached a stage of 20.3 ft, from floodmarks, discharge, about 46,000 ft3/s.
EXTREMES FOR PERIOD PRIOR TO REGULATION.--Maximum discharge, prior to construction of Cannonsville Reservoir in 1963, 28,900 ft3/s, Mar. 22, 1948, gage height, 15.69 ft; maximum gage height, 15.8 ft, Sept. 30, 1924, from graph based on gage readings.
PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: October 1967 to current year (no winter record for water years 1969-77).
INSTRUMENTATION1.--Water-temperature satellite and telephone telemeter provides 15-minute-interval readings. From October 1976 to April 1993, water-temperature recorder provided one-hour-interval readings. Prior to October 1976, water-temperature recorder provided continuous readings.
REMARKS1.--Temperature readings prior to Oct. 1, 2007, rounded to the nearest 0.5 °C. Water temperature is affected by release of water from upstream reservoir.
EXTREMES FOR PERIOD OF DAILY RECORD1.--WATER TEMPERATURE: Prior to Oct. 1, 2007--Maximum (water years 1968-77, 1979-83, 1985, 1988-96, 1998-2007), 30.5 °C, July 22, 23, 1972, June 16, 1981; minimum (water years 1968, 1978-2007), 0.0 °C on many days during winter periods.
WATER TEMPERATURE: After Oct. 1, 2007--Maximum, 20.3 °C, May 11, 2015; minimum, 0.0 °C, Dec. 2, 2007, Nov. 23, 2008, several days during 2011 winter period, Jan. 15, 2012, Feb. 12, 13, 2014.
1 Water-Quality Records

Peak Flow and Stage Information

Gage Photo


This station managed by the NY Water Science Center Troy.

Available Parameters Available Period
All 3 Available Parameters for this site
00010 Temperature, water 2007-10-01  2017-01-18
00060 Discharge 2007-10-01  2017-01-18
00065 Gage height 2016-09-20  2017-01-18

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Instantaneous-data availability statement

Discharge, cubic feet per second

Most recent instantaneous value: 460 01-18-2017   04:45 EST
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Daily discharge, cubic feet per second -- statistics for Jan 18 based on 52 years of record more
Median Most Recent
Value Jan 18
Mean Max
70 131 440 460 654 724 6300

Gage height, feet

Most recent instantaneous value: 2.81 01-18-2017   04:45 EST
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