LOCATION.--Lat 42°28'21.5", long 74°26'28.1" referenced to North American Datum of 1983, Schoharie County, NY, Hydrologic Unit 02020005, on right bank at bridge on State Highway 30, 0.8 mi downstream from West Brook, and 2 mi northeast of North Blenheim.
DRAINAGE AREA.--405 mi².  
PERIOD OF RECORD.--November 2017 to current year.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 766.54 ft above NAVD of 1988.
REMARKS.--Regulation of flow by New York Power Authority Blenheim-Gilboa Pumped Storage Project upstream from gage. 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 2018-20: Records fair except those for estimated discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 18,400 ft³/s, Aug. 14, 2018, gage height, 12.42 ft; minimum discharge, 10.5 ft³/s, Sept. 30, Oct. 1, 2019, gage height 1.72 ft.

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