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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.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
01158000 ASHUELOT RIVER BELOW SURRY MOUNTAIN DAM, NEAR KEENE, NH
LOCATION - Lat 42°59'41", long 72°18'42" referenced to North American Datum of 1927, Cheshire County, NH, Hydrologic Unit 01080201, on right bank, 1000 ft south of Surry Mountain Dam, 2.7 mi upstream from Sturtevant Brook, 4.4 mi southwest of Post Office in Gilsum, 4.5 mi north of Courthouse in Keene, and at mile 34.0.
DRAINAGE AREA - 101 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records: September 1945 to September 1989, October 1995 to current year. Peak streamflow: Water years 1946 to current year. Miscellaneous discharge measurements: Water years 1990 to 1995.
GAGE - Water-stage recorder and concrete control. Elevation of gage is 479.61 ft above North American Vertical Datum of 1988.
COOPERATION - U.S. Army Corps of Engineers, New England District.
REMARKS - WATER YEARS 2014-23: Records good except those for estimated daily discharges, which are poor. Flow regulated by Surry Mountain Dam.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,260 ft³/s, Apr 7, 1987, gage height, 11.78 ft, from flood marks.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water-quality discrete samples: Water years 1956 to 1959, 1965 to 1970, 1975 to 1999.
