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Water-Year Summary for Site 01160350

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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Available Parameters
00060 Discharge(Mean)  

Water year 2021: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2021
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.
REMARKS - WATER YEAR 2014-20: Records good except those for estimated discharges, which are poor. Flow regulated by Surry Mountain Lake 20 mi upstream since 1942, and by Otter Brook Lake 16 mi upstream on Otter Brook since 1958. Some regulation by small hydro plants upstream.
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.