LOCATION.--Lat 42°56'08", long 73°39'06" referenced to North American Datum of 1983, Rensselaer County, NY, Hydrologic Unit 02020003, on left bank at dam, 0.15 mi downstream from bridge on State Highway 67 in Stillwater, and 0.75 mi upstream from Hoosic River.
DRAINAGE AREA.--3,773 mi².
PERIOD OF RECORD.--Occasional discharge measurements, water years 1932-33, 1966-67. March 1977 to current year. Daily discharge records prior to October 1981 are published with suspended-sediment data.
GAGE.--There is no gage, since September 1992. Discharge is estimated based on records for Hudson River at Fort Edward (station 01327750) and Batten Kill below mill at Battenville (station 01329490). Prior to October 1992, water-stage recorder and crest-stage gage at datum of 78.99 ft above NGVD of 1929. Prior to January 1978, nonrecording gages in upper pool of Champlain (Barge) Canal Lock 4, at Barge Canal datum.
REMARKS.--Flow regulated appreciably by Great Sacandaga Lake (station 01323500) and Indian Lake (station 01314500). Diurnal fluctuation caused by powerplants upstream from station. Water is diverted into St. Lawrence River basin through Glens Falls feeder, Bond Creek, and Champlain (Barge) Canal, and occasionally may be received from that basin through summit level of Champlain (Barge) Canal at Dunham Basin.
Water Years 2014-22: Records poor.
EXTREMES FOR PERIOD OF RECORD.--Maximum daily discharge, about 52,000 ft³/s, Apr. 29, 2011; minimum daily discharge, 900 ft³/s, July 25, 1983. Maximum and minimum instantaneous discharges not determined.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge, about 110,000 ft³/s, Mar. 28, 1913, and about 62,000 ft³/s, Jan. 1, 1949, both on basis of comparison with nearby stations.
PERIOD OF DAILY RECORD¹.--SUSPENDED-SEDIMENT DISCHARGE: March 1977 to March 2002.
EXTREMES FOR PERIOD OF DAILY RECORD¹.-- SUSPENDED-SEDIMENT CONCENTRATION: Maximum daily mean, 450 mg/L, Dec. 17, 2000; minimum daily mean, <1 mg/L on many days during water years 1991-95, 1997-98; minimum daily mean since 2002 water year, <0.5 mg/L on several days during water year 2002. SUSPENDED-SEDIMENT DISCHARGE: Maximum daily, 27,500 tons, Jan. 9, 1998; minimum daily, 3.3 tons, Jan. 4, 2002.
¹ Water-Quality Records

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