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LOCATION--Lat 42o09'13", long
71o39'09", Worcester County, Hydrologic Unit
01090003, on left bank at Northbridge, 100 ft downstream from Sutton
Street Bridge and 3.0 mi downstream from Quinsigamond River.
DRAINAGE AREA--141 mi2.
PERIOD OF RECORD--Discharge: October 1939 to September 1977; October 1995 to September 2003 (discharge record discontinued). October and November 1939, monthly discharge only, published in Water-Supply Paper (WSP) 1301.
Water-quality records: Water years, 1955, 1958, 1971.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 254.30 ft above NAVD 1988, estimated from topographic map. Prior to May 4, 2020, datum of gage reported as 255 ft above NGVD 1929, estimated from topographic map.
REMARKS--Published discharge record discontinued on September 30, 2003. Stage affected by three upstream waste-water treatment plants and upstream and downstream reservoirs.
FLOOD STAGE--Flood stage of 9 ft determined by National Weather Service.
PROVISIONAL DISCHARGE DURING FLOODS--Provisional discharge data are available when gage height equals or exceeds 5.19 ft (1,000 ft3/s). Discharge data for gage heights less than 5.19 ft are not available due to variations in the stage-discharge relation.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources.
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