LOCATION.--Lat 43°18'41", long
73°52'02" referenced to North American Datum of 1983,
Saratoga County, NY, Hydrologic Unit 02020002, on left bank 1.0
mi downstream from Stewarts Bridge, 1.1 mi west of Hadley, 1.4
mi upstream from mouth, and 1.5 mi downstream from Stewarts
Bridge hydroelectric plant.
DRAINAGE AREA.--1,055 mi².
PERIOD OF RECORD.--September 1907 to current year.
Published as "near Hadley" 1907-l910, "at
Hadley" 1911-32 and "at Conklingville" 1932-52.
Records published for present site and former site October 1951
to September 1952.
REVISIONS HISTORY.--WSP 1302: 1908. WSP 1432: 1910-12,
1916-21. WDR NY-83-1: 1968(M), 1971-72(M), 1976-77(M),
1979(M).
GAGE.--Water-stage recorder and crest-stage gage. Datum
of gage is 582.00 ft above NGVD of 1929 and 581.28 ft above
NAVD of 1988. Prior to Jan. 1, 1911, nonrecording gage at site
about 1 mi upstream at different datum. Jan. 1, 1911 to Sept.
30, 1932, at site 0.8 mi downstream at datum 8.82 ft lower.
Oct. 1, 1932 to Sept. 30, 1952, at site 3.6 mi upstream at
datum 85.47 ft higher.
COOPERATION.--From Oct. 1, 1932 to Dec. 4, 1979,
discharge computed by Board of Hudson River-Black River
Regulating District from rating developed by U.S. Geological
Survey. Since Dec. 4, 1979, discharge computed by U.S.
Geological Survey.
REMARKS.--Flow regulated by Great Sacandaga Lake since
Mar. 27, 1930 (station 01323500); discharge over spillway, part
or all of several days in 1983, 1990, 1993, 2000, 2003-04,
2006-08, 2011 (only spillage since completion of Conklingville
Dam in 1930). Extensive diurnal fluctuation caused by release
of water from Great Sacandaga Lake, through Elmer J. West
hydroelectric station directed by Board of Hudson River-Black
River Regulating District and through Stewarts Bridge
hydroelectric station.
Water Years 2014-23: Records good except those below about 50
ft³/s, which are fair.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, since
construction of Great Sacandaga Lake in 1930, 16,500 ft³/s, May
2, 2011, gage height, 10.40 ft; minimum, 4.2 ft³/s, May 4,
1985, Mar. 30, 31, Apr. 1-10, 11, 13, 14, 15, 1992.
EXTREMES FOR PERIOD PRIOR TO REGULATION.--Maximum
discharge, prior to construction of Great Sacandaga Lake in
1930, about 35,500 ft³/s, Mar. 28, 1913, gage height, 12.36 ft,
site and datum then in use.
This page is undergoing modernization with expected decommissioning as key features
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