LOCATION.--Lat 41°49'12", long
74°38'08" referenced to North American Datum of 1983,
Sullivan County, NY, Hydrologic Unit 02040104, on right bank at
downstream end of outlet channel, 1,650 ft downstream from
Neversink Dam and State Highway 55, 2.0 mi southwest of
Neversink, and 2.6 mi upstream from Wynkoop Brook.
DRAINAGE AREA.--92.6 mi².
PERIOD OF RECORD.--October 1941 to current year.
REVISIONS HISTORY.--WDR NY-72-1: 1961 (M), 1968 (M). WDR
NY-82-1: Drainage area.
GAGE.--Water-stage recorder and concrete control. Datum
of gage is 1,255.24 ft above NGVD of 1929 (levels by Board of
Water Supply, City of New York) and 1,253.99 ft above NAVD of
1988. Prior to Jan. 17, 1953, at site 650 ft downstream at
datum 0.20 ft lower. Jan. 17, 1953 to Apr. 16, 1954, at present
site at datum 0.41 ft higher.
REMARKS.--Subsequent to June 1953, entire flow from 92.5
mi² of drainage area controlled by Neversink Reservoir (station
01435900). Part of flow diverted for New York City municipal
supply. Remainder of flow (except for conservation release and
spill) impounded for release during periods of low flow in the
lower Delaware River basin, as directed by the Delaware River
Water Years 2014-20: Records good.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, since
construction of Neversink Reservoir in 1953, 12,300 ft³/s, Apr.
3, 2005, gage height, 12.99 ft, outside gage height was about
14.8 ft, from floodmark, from rating curve extended above 6,000
ft³/s; no flow for all or part of each day Sept. 22-24, Oct.
EXTREMES FOR PERIOD PRIOR TO REGULATION.--Maximum
discharge, prior to construction of Neversink Reservoir in
1953, 22,300 ft³/s, Nov. 25, 1950, gage height, 11.23 ft, site
and datum then in use, from rating curve extended above 2,600
ft³/s on basis of contracted-opening and critical-depth
measurements of peak flow; maximum gage height, 11.65 ft, Sept.
27, 1942, site and datum then in use.
PERIOD OF RECORD1.--SPECIFIC CONDUCTANCE:
December 2019 to current year. WATER TEMPERATURE: July 2019 to
INSTRUMENTATION1.--A continuous water-quality
monitor with water temperature and specific conductance
provides 15-minute-interval readings.
REMARKS1.--Interruption of record was due to
malfunction of recording instrument.
EXTREMES FOR PERIOD OF DAILY
RECORD1.--SPECIFIC CONDUCTANCE: Maximum, 36
uS/cm at 25 °C, Sept. 2, 2020; minimum, 7 uS/cm at 25
°C, Apr. 13, 2020. WATER TEMPERATURE: Maximum, 13.4
°C, Oct. 10, 2019; minimum, 0.9 °C, Feb. 29,
1 Water-Quality Records