This station is operated in cooperation
New York City Department of Environmental
U.S. Geological Survey
Lat 42°04'30", long 74°58'35"
referenced to North American Datum of 1983, Delaware County, NY,
Hydrologic Unit 02040102, on left bank 0.5 mi downstream from
Downsville Dam, at downstream end of outlet channel of Pepacton
Reservoir, and 1.0 mi east of Downsville.
PERIOD OF RECORD.--
July 1941 to current year.
WDR NY-82-1: Drainage area. WDR-US-2006:
Water-stage recorder and concrete control. Datum of gage
is 1,094.92 ft above NGVD of 1929 (levels by Board of Water Supply,
City of New York) and 1,094.41 ft above NAVD of 1988 (VERTCON). Prior
to Sept. 26, 1941, nonrecording gage, and Sept. 26, 1941 to June 27,
1955, water-stage recorder, at site 0.8 mi downstream at datum 7.03 ft
Subsequent to September 1954, entire flow from
drainage area controlled by Pepacton Reservoir (station 01416900). 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.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, since
construction of Pepacton Reservoir in 1954, 20,200 ft³/s, Sept. 18,
2004, gage height, 12.08 ft; minimum discharge, 0.3 ft³/s, Oct. 11,
1954; minimum gage height, 1.39 ft, Jan. 17, 1964.
EXTREMES OUTSIDE PERIOD OF RECORD.--
Flood of Oct. 9, 1903,
reached a stage of about 16 ft (at former site and datum).
EXTREMES FOR PERIOD PRIOR TO REGULATION.--
prior to construction of Pepacton Reservoir in 1954, 23,900 ft³/s, Nov.
26, 1950, gage height, 14.52 ft, site and datum then in use.
Peak Flow and Stage Information
USGS provisional real-time discharge data can
differ from NYCDEP discharge data at flows less than 700
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