LOCATION--Lat 42^o21'44", long 71^o04'43", Suffolk County, Hydrologic Unit 01090001, on left bank, 100 ft downstream from Longfellow Bridge, at intersection of Broad Canal and First St. Bridge, Cambridge, MA..
DRAINAGE AREA--309 mi², excludes 23.6 mi² drained by Stony Brook, from which flow is diverted for municipal supply for Cambridge.
PERIOD OF RECORD--January 2007 to current year.
GAGE--Data Collection Platform with telephone telemeter.
DATUM--Datum of gages are from the Massachusetts Metropolitan District Commission base, which is 105.62 ft higher than NGVD 1929.
REMARKS--Stage may be affected by operation of the New Charles River Dam about 1 mile downstream.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Division of Planning and Engineering