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Water-Year Summary for Site 01086000

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

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USGS Water-Year Summary 2022
LOCATION - Lat 43°15'03", long 71°43'58" referenced to North American Datum of 1927, Merrimack County, NH, Hydrologic Unit 01070003, on left bank, 60 ft downstream from bridge on State Highway 127 at Davisville, 2.2 mi northwest of State Highways 103 and 127 intersection in Contoocook, 2.3 mi upstream from mouth, and 4.8 mi southeast of Warner.
DRAINAGE AREA - 146 mi².
PERIOD OF RECORD - Discharge records: October 1939 to September 1978, October 2001 to current year. Partial-record station: October 1998 to September 2001. Peak streamflow: Water years 1938, 1940 to 1978, 1999 to current. Water-quality discrete samples: Water years 1954, 1975 to 1978, 1999. Miscellaneous discharge measurements only: Water years 1991, 1999 to 2001.
GAGE - Water-stage recorder. Datum of gage is 379.37 ft above North American Vertical Datum of 1988. Prior to December 22, 1939, chain gage at bridge 60 ft upstream at same datum.
COOPERATION - USGS Federal Priority Streamgage Program and the U.S. Army Corps of Engineers, New England District.

WATER YEARS 2014-17: Records good except for estimated daily discharges, which are poor.

WATER YEARS 2018-22: Records good except for estimated discharges, which are poor. 

Prior to 1948, slight diurnal fluctuation at low flow caused by mill upstream.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood in September 1938 reached a stage of 12.8 ft, from information by local residents.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 8,640 ft³/s, May 15, 2006, gage height, 12.35 ft. Minimum discharge, 2.6 ft³/s, August 17 and 18, 1965.