LOCATION--Lat 42° 34'48.8", long 72° 34'28.2",(revised) Franklin County, Hydrologic Unit 01080201, on left bank 75 ft downstream from railroad bridge at Montague City, 1,000 ft downstream from Deerfield River, and at mile 119.0.
DRAINAGE AREA--7,860 mi².
PERIOD OF RECORD--Discharge: March 1904 to current year. Prior to October 1929, published as "at Sunderland." Records published for both sites October 1929 to September 1932.
Water-quality records: Water years 1994–95.
REVISED RECORDS--WSP 471: 1904–17. WSP 741: 1930–32. WSP 781: 1928(M). WSP 1051: 1905, 1909–10, 1912–14, 1920, 1922–23, 1925–26, 1928, drainage area at Sunderland. WSP 1301: 1905(M), 1914–19(M), 1930–31(M). WDR MA-RI-84-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 98.80 ft above North American Vertical Datum of 1988. Prior to Oct. 1, 1917, nonrecording gage; Oct. 1, 1917, to Oct. 8, 1921, water-stage recorder used for low stages, nonrecording gage otherwise; and Oct. 9, 1921, to Sept. 30, 1932, water-stage recorder; all at site 9 mi downstream at datum 1.00 ft lower. Since Oct. 1, 1929, water-stage recorder at present site and datum.
REMARKS--Flow regulated by powerplants and by First Connecticut and Second Connecticut Lakes, Lake Francis, Moore and Comerford Reservoirs, and other reservoirs, combined usable capacity, about 43,400,000,000 cubic feet.