Funding for this site is provided by:
42°04'29.7", long 75°23'44.9" referenced to North
American Datum of 1983, Delaware County, NY, Hydrologic Unit 02040101,
on right bank at Stilesville, 0.5 mi upstream from Cold Spring Creek,
1.4 mi downstream from Cannonsville Dam, and 2.0 mi northeast of
PERIOD OF RECORD.--
July 1952 to current year.
WDR NY-05-1: 1973, 1977, 1979, 1986, 1993,
2004. 2014: Daily temperature.
Water-stage recorder and concrete control. Datum of gage
is 992.23 ft above NGVD of 1929 (levels by Board of Water Supply, City
of New York) and 991.68 ft above NAVD of 1988. Prior to Oct. 1, 1964,
at site 600 ft downstream at datum 1.37 ft higher.
Subsequent to October 1963, entire flow from 454 mi²
of 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 period of low flow in the lower Delaware
River basin, as directed by the Delaware River Master.
Water Years 2014-19: Records fair.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, since
construction of Cannonsville Reservoir in 1963, 33,100 ft³/s, June 28,
2006, gage height, 17.72 ft; minimum discharge not determined.
EXTREMES FOR PERIOD PRIOR TO REGULATION.--
prior to construction of Cannonsville Reservoir in 1963, 17,500 ft³/s,
Jan. 22, 1959, gage height, 9.01 ft, site and datum then in use.
PERIOD OF DAILY RECORD1.--
WATER TEMPERATURE: October
1962 to current year.
telemeter provides 15-minute-interval readings. From October 1975 to
February 1993, water-temperature recorder provided one-hour-interval
readings. Prior to October 1975, water-temperature recorder provided
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. Interruption of record was
due to malfunction of recording instrument.
EXTREMES FOR PERIOD OF DAILY RECORD1.--
TEMPERATURE: Prior to Oct. 1, 2007--Maximum (water years 1963-78,
1980-82, 1984-86, 1988, 1990-92, 1994-95, 1997, 1999-2002, 2004-07),
30.5 °C, July 2, 1963; minimum (water years 1963-95, 1998-2003, 2006),
0.0 °C on many days during winter periods, except 1969, 1973, 1986-87,
1990-91, 1994-95, 2001, 2006. WATER TEMPERATURE: After Oct. 1,
2007--Maximum, 24.6 °C, Aug. 20, 2018; minimum, 0.0 °C, Feb. 20,
1 Water-Quality Records
Peak Flow and Stage Information
USGS provisional real-time discharge data can
differ from NYCDEP discharge data at flows less than 2,100
ft3/s as a result of debris or other obstructions affecting
the USGS stage-discharge relationship. USGS and NYCDEP data may also
differ as a result of accuracy limitations of the stage-discharge
rating and the release valve ratings. Release valve changes are
recorded at the stream-gaging station after a brief period due to
travel time between the two locations.
More information about provisional data can be found at https://waterdata.usgs.gov/nwis/help/?provisional