USGS Water-Year Summary 2021
01354500 MOHAWK RIVER AT FREEMAN'S BRIDGE AT SCHENECTADY, NY
LOCATION - Lat 42°49'49.9", long 73°55'50.7" referenced to North American Datum of 1983, Schenectady County, NY, Hydrologic Unit 02020004, on left bank 12 ft downstream from bridge on Freeman's Bridge Road, 1.2 mi north of Schenectady.
DRAINAGE AREA - 3,310 mi².
PERIOD OF RECORD - Occasional low-flow and/or miscellaneous discharge measurements, water years 1899-1901, 1920, 1953, 1966-67. August 2011 to current year.
GAGE - Water-stage recorder and acoustic velocity meter. Datum of gage is 200.00 ft above NGVD of 1929 and 199.46 ft above NAVD of 1988. Prior to Oct. 1, 2013, datum of gage was 199.74 ft above NGVD of 1929, not 200.00 ft above NGVD of 1929 as previously published.
EXTREMES OUTSIDE PERIOD OF RECORD - An extreme flood occurred sometime from 1860-65 with a depth of 12 ft on the Cohoes dam and a peak discharge estimated to be at least 200,000 ft³/s (from New York State Museum Bulletin 85).
EXTREMES FOR PERIOD OF RECORD - Maximum discharge 130,000 ft³/s Aug. 29, 2011, gage height 26.15 ft, present datum; minimum discharge not determined; minimum gage height, 7.92 ft, Dec. 31, 2017, result of freezeup.