LOCATION--Lat 42° 40’03", long 71° 34’32", Middlesex County, Hydrologic Unit 01070004, on right bank 200 ft downstream from powerplant of James River–Pepperell Co. at East Pepperell and 0.8 mi upstream from Nissitissit River.
DRAINAGE AREA--Total above gage, 435 mi², net above gage, 316 mi², excludes 119 mi² for use of Boston metropolitan district and city of Worcester.
PERIOD OF RECORD--Discharge: October 1935 to current year.
Water-quality records: Water years 1952–53, 1973–74.
REVISED RECORDS--WDR MA-RI-84-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 168.28 ft above NAVD 1988. Prior to May 13, 2020 datum of gage reported as 169.04 ft above NGVD 1929.
REMARKS--Extremes and daily discharge include water released while diverting flow of Nashua River for use of Boston metropolitan district and water diverted into basin from Ware River Basin since 1955 for municipal use of Fitchburg. Prior to October 1981, water diverted around station through plant of James River–Pepperell Co. was added to daily figures. Flow regulated by powerplant immediately upstream.
COOPERATION BY--Massachusetts Department of Conservation and Recreation,Office of Water Resources.