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 99.32 ft above NAVD 1988. Datum previously reported as 99.87 ft above NGVD 1929 at present site since Oct. 1, 1929. 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.
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.