This station is operated in cooperation
New York Power Authority
Lat 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
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. Prior to Aug. 29, 2011, at site 200 ft
upstream at same datum.
No estimated daily discharges. Records fair. 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. Satellite gage-height telemeter at station.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 111,000
/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
/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 not determined.
EXTREMES OUTSIDE PERIOD OF RECORD.--
Maximum discharge, about
/s, Oct. 16, 1955, by computation of flow over
dam; flood of Mar. 18, 1936, reached a discharge of 32,000
/s, from information furnished by Bureau of Water
Resources Development, City of New York.
Peak Flow and Stage Information
DISCHARGE <10 cfs NOT DETERMINED AT THIS
Radar elevation may correspond to top of ice during winter