Funding for this site is provided by:
42°23'50", long 74°27'02" referenced to North
American Datum of 1983, Schoharie County, NY, Hydrologic Unit 02020005,
on left bank at downstream side of bridge on State Route 990V, 0.2 mi
west of village of Gilboa, 0.5 mi downstream from dam on Schoharie
Reservoir, and 0.8 mi upstream from the Platter Kill.
PERIOD OF RECORD.--
October 1975 to current year (since October
1983, discharges only for days of Schoharie Reservoir spill and since
October 1989, discharges only for days of mean flow exceeding 10
WDR NY-90-1: Drainage area.
Water-stage recorder and crest-stage gage. Datum of gage
is 939.56 ft above NGVD of 1929 and 938.97 ft above NAVD of 1988. Prior
to Aug. 29, 2011, at site 200 ft upstream at same datum.
Entire flow, runoff from 315 mi², except for periods
of spill, diverted from Schoharie Reservoir through Shandaken Tunnel
into Esopus Creek upstream from Ashokan Reservoir for water supply of
City of New York.
Water Years 2014-18: Records fair.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 111,000
ft³/s, Aug. 28, 2011, gage height, 40.52 ft, from floodmark at site
then in use, 32.34 ft, from floodmark at present site, from rating
curve extended above 22,000 ft³/s on basis of flow-over-dam measurement
of peak flow; minimum daily discharge, 0.04 ft³/s on many days, June to
October 1976, and Sept. 11-13, 1980, but may have been lower since
October 1983 (see PERIOD OF RECORD); minimum instantaneous discharge
EXTREMES OUTSIDE PERIOD OF RECORD.--
Maximum discharge, about
65,000 ft³/s, Oct. 16, 1955, by computation of flow over dam; flood of
Mar. 18, 1936, reached a discharge of 32,000 ft³/s, from information
furnished by Bureau of Water Resources Development, City of New
Peak Flow and Stage Information
DISCHARGE <10 cfs NOT DETERMINED AT THIS
Radar elevation may correspond to top of ice during winter