USGS Water-Year Summary 2020
01154950 COLD RIVER AT HIGH STREET, AT ALSTEAD, NH
LOCATION - Lat 43°08'58", long 72°21'42" referenced to North American Datum of 1983, Cheshire County, NH, Hydrologic Unit 01080104, on left bank, at High Street (NH 12A/123), 100 ft southeast of River Street and High Street (NH 12A/123) intersection at Alstead, 250 ft north of Main Street, High Street (NH 12A/123), and Mechanic Street(NH 12A/123) intersection, and 2.1 mi northeast of Whitcomb Road (NH 123), Old Cheshire Turnpike, and Alstead Center Road intersection at Drewsville.
DRAINAGE AREA - 74.6 mi².
PERIOD OF RECORD - Discharge records: September 2009 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 452.00 ft above North American Vertical Datum of 1988.
COOPERATION - New Hampshire Department of Environmental Services.
EXTREMES OUTSIDE PERIOD OF RECORD - Flood in October 2005 reached a stage of 25.4 ft, from floodmarks.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,890 ft³/s, Oct 24, 2009, gage height, 7.80 ft, from rating curve extended above 2,300 ft³/s; minimum discharge, 2.3 ft³/s, Sep 7, 2010. Maximum gage height, 9.13ft, Jan 12, 2018 (ice jam).
PERIOD OF RECORD - June 21, 2016 to current year.
INSTRUMENTATION - Water-temperature recorder since June 21, 2016 provides continuous recordings.