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LOCATION.--Lat
42°00'10.9", long 75°23'00.7" 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.
REVISIONS HISTORY.--WSP 871: 1916. WDR NY-82-1: Drainage
area.
GAGE.--Water-stage recorder. Datum of gage is 946.46 ft above
NGVD of 1929 and 945.98 ft above NAVD of 1988. 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 Years 2014-18: 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, -0.1 °C, Dec. 28, 29, 2017.
1 Water-Quality Records
Peak Flow and Stage Information
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