LOCATION--Lat 42°33’40", long 71°06’38", Middlesex County, Hydrologic Unit 01090001, on right bank at downstream side of Mill Street bridge, 0.5 mi upstream from Bear Meadow Brook, 0.8 mi upstream from Martins Brook, and 2 mi southwest of North Reading.
DRAINAGE AREA--18.5 mi².
PERIOD OF RECORD--September 2007 to current year.
GAGE--Water-stage recorder with satellite telemeter. Datum of gage is 60 ft above National Geodetic Vertical Datum of 1929, from topographic map.
REMARKS--Flow affected by upstream ground-water withdrawals for municipal supply.
COOPERATION BY--Massachusetts Executive Office of Energy and Environmental Affairs