USGS Water-Year Summary 2021
01170100 GREEN RIVER NEAR COLRAIN, MA
LOCATION - Lat 42°42'12", long 72°40'16" referenced to North American Datum of 1927, Franklin County, MA, Hydrologic Unit 01080203, on right bank 0.5 mi upstream from bridge on West Leyden Road and 2.5 mi northeast of Colrain.
DRAINAGE AREA - 41.4 mi².
- WDR MA-NH-RI-VT-71-1: 1968(M), 1969; 1998-2004, MA-RI-05-1(M),MA-RI-11-1(M). Annual peak discharge for listed water year is revised as follows:
2011, 13,200 ft³/s, Aug. 28, 2011.
PERIOD OF RECORD - Discharge records: October 1967 to current year. Water-quality records: Water years 1968-69, 1993-95, 2002-05; intermittent water-quality samples, water years 1968-69, 1993-95, 2002-05; continuous water-quality records, water years 2002 and 2003.
GAGE - Water-stage recorder with satellite telemeter and crest-stage gage. Elevation of gage is 432.26 ft above North American Vertical Datum of 1988.
COOPERATION - Massachusetts Department of Conservation and Recreation, Office of Water Resources.
DATUM - Land-surface datum is 432.26 ft above North American Vertical Datum of 1988. Measuring point: MEASURINGPOINT.
EXTREMES FOR PERIOD OF DAILY RECORD -
DECEMBER 2001 TO OCTOBER 2002:
SPECIFIC CONDUCTANCE: Maximum recorded, 129 mS/cm, Oct. 10, 2002; minimum, 46 mS/cm, Sept. 17, 2002. WATER TEMPERATURE: Maximum recorded, 27.9°C, Aug. 16, 2002; minimum, 0.0°C, many days during winter period.
OCTOBER 1, 2015 TO CURRENT YEAR:
WATER TEMPERATURE: Maximum, 26.9°C, Aug. 13, 2016; minimum, 0.0°C, on many days during winter period.