Funding for this site is provided by:
42°27'57", long 74°27'44" referenced to North
American Datum of 1983, Schoharie County, NY, Hydrologic Unit 02020005,
on left bank 2,300 ft upstream from West Kill, and 1.2 mi upstream from
bridge on State Highway 30 in North Blenheim.
PERIOD OF RECORD.--
Occasional discharge measurements, water
years 1969-70. October 1970 to current year (January 20 to September
30, 1996, discharges only for days of mean flow less than or equal to
WDR NY-87-1: 1984(M). WDR NY-90-1: Drainage
area. WDR-US-2011: 2010(M).
Water-stage recorder and crest-stage gage. Datum of gage
is 794.42 ft above NGVD of 1929. Prior to Oct. 1, 1971, at datum 1.00
Records of flow provided by the New York Power
Authority as explained in REMARKS.
Regulation of flow by New York Power Authority
Blenheim-Gilboa Pumped Storage Project immediately 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.
For days of reservoir outflow greater than 10 ft³/s, see station
01350101. From Jan. 19, 1996, through Sept. 30, 1998, if flow was
greater than about 400 ft³/s, undetermined amounts of flow bypassed the
gage. From Oct. 1, 1998, through Sept. 30, 2000, if flow was greater
than about 2,000 ft³/s, undetermined amounts of flow bypassed the gage.
From Oct. 1, 2000, through Sept. 30, 2006, if flow was greater than
about 5,000 ft³/s, undetermined amounts of flow bypassed the gage. From
Oct. 1, 2006, through Aug. 27, 2011, if flow was greater than about
6,000 ft³/s, undetermined amounts of flow bypassed the gage. From Aug.
28, 2011, through Sept. 30, 2012, if flow was greater than about 30
ft³/s, undetermined amounts of flow bypassed the gage. Since October
1996, records for periods when flows bypass the gage are furnished by
the New York Power Authority.
Water Years 2014-16: Records fair except those for estimated daily
discharges, which are poor.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 119,000
ft³/s, Aug. 28, 2011, from New York Power Authority, gage height, 22.00
ft, outside gage height was 22.34 ft, from floodmark; minimum, no flow,
Oct. 12, 15, Oct. 16 to Nov. 1, Nov. 2, 1972, Sept. 12, 13, 14,
Peak Flow and Stage Information