USGS Water-Year Summary 2021
01160350 ASHUELOT RIVER AT WEST SWANZEY, NH
LOCATION - Lat 42°52'17", long 72°19'43" referenced to North American Datum of 1927, Cheshire County, NH, Hydrologic Unit 01080201, on left bank, 100 ft downstream of California/Main Street bridge in West Swanzey, 4.6 mi downstream from South Branch Ashuelot River, 5.1 mi southwest of City Hall in Keene, and 18.2 mi upstream from mouth.
DRAINAGE AREA - 316 mi².
PERIOD OF RECORD - Discharge records: April 1994 to current year. Peak streamflow: Water years 1994 to current year. Miscellaneous discharge measurements only: Water year 1990.
GAGE - Water-stage recorder. Elevation of gage is 444 ft above National Geodetic Vertical Datum of 1929, from topographic map. Prior to Aug. 13, 2010, at datum of 452 ft above National Geodetic Vertical Datum of 1929. From August 13, 2010 to September 9, 2013, at site 400 ft downstream.
COOPERATION - City of Keene, NH.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 6,210 ft³/s, Oct 9, 2005, gage height, 5.62 ft (datum then in use); maximum gage height, 6.30 ft, Mar 7, 1999 (ice jam; datum then in use).
PERIOD OF RECORD - Water-quality discrete samples: Water years 1994 to 1999.