PROVISIONAL DATA SUBJECT TO REVISION
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LOCATION.--Lat 42°35'58.2", long
74°20'10.9" referenced to North American Datum of
1983, Schoharie County, NY, Hydrologic Unit 02020005, on right
bank on downstream side of bridge on State Highways 30 and 145
in Middleburgh, 0.6 mi downstream from Little Schoharie Creek,
and about 36 mi upstream from mouth.
DRAINAGE AREA.--534 mi².
PERIOD OF RECORD.--July 1927 to September 1939, December 2017 to current year. August 1906 to June 1918 in reports of New York State engineer and surveyor. Records for July 1918 to June 1927 also collected by State engineer and surveyor but not published.
REVISIONS HISTORY.--Discharge for Dec. 25, 2020, the maximum discharge for water year 2021, and the reported extreme maximum discharge for period of record was revised on Feb. 15, 2023, based on changes to the stage-discharge rating.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 612.48 ft above NAVD of 1988 (New York State Department of Environmental Conservation Flood Plain Elevation Reference Mark). From July 1927 to September 1939, at site 150 ft downstream at different datum.
REMARKS.--Flow regulated to some extent by Blenheim-Gilboa Pumped Storage Project about 19 mi upstream. 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. For days of reservoir outflow greater than 10 ft³/s, see station 01350101. Water Years 2018-23: Records fair except those for estimated daily discharges and those above 30,000 ft³/s, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 47,800 ft³/s, Mar. 18, 1936, gage height, 16.80 ft, site and datum then in use, from rating curve extended above 14,000 ft³/s on basis of slope-area measurement of peak flow at Central Bridge, 10 mi downstream, adjusted for flow from intervening area; minimum discharge, 2.0 ft³/s, Sept. 1, 1939, gage height, 0.50 ft, site and datum then in use.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, about 130,000 ft³/s, Aug. 28, 2011, gage height, 27.31 ft, from floodmarks, on basis of runoff comparisons with nearby stations. Flood of Jan. 19-20, 1996, reached a stage of 23.01 ft, from floodmark. Flood of Apr. 4-5, 1987, reached a stage of 22.52 ft, from floodmark.
DRAINAGE AREA.--534 mi².
PERIOD OF RECORD.--July 1927 to September 1939, December 2017 to current year. August 1906 to June 1918 in reports of New York State engineer and surveyor. Records for July 1918 to June 1927 also collected by State engineer and surveyor but not published.
REVISIONS HISTORY.--Discharge for Dec. 25, 2020, the maximum discharge for water year 2021, and the reported extreme maximum discharge for period of record was revised on Feb. 15, 2023, based on changes to the stage-discharge rating.
GAGE.--Water-stage recorder and crest-stage gage. Datum of gage is 612.48 ft above NAVD of 1988 (New York State Department of Environmental Conservation Flood Plain Elevation Reference Mark). From July 1927 to September 1939, at site 150 ft downstream at different datum.
REMARKS.--Flow regulated to some extent by Blenheim-Gilboa Pumped Storage Project about 19 mi upstream. 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. For days of reservoir outflow greater than 10 ft³/s, see station 01350101. Water Years 2018-23: Records fair except those for estimated daily discharges and those above 30,000 ft³/s, which are poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 47,800 ft³/s, Mar. 18, 1936, gage height, 16.80 ft, site and datum then in use, from rating curve extended above 14,000 ft³/s on basis of slope-area measurement of peak flow at Central Bridge, 10 mi downstream, adjusted for flow from intervening area; minimum discharge, 2.0 ft³/s, Sept. 1, 1939, gage height, 0.50 ft, site and datum then in use.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, about 130,000 ft³/s, Aug. 28, 2011, gage height, 27.31 ft, from floodmarks, on basis of runoff comparisons with nearby stations. Flood of Jan. 19-20, 1996, reached a stage of 23.01 ft, from floodmark. Flood of Apr. 4-5, 1987, reached a stage of 22.52 ft, from floodmark.
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