Data were downloaded from USGS web site:
http://waterdata.usgs.gov/ma/nwis/uv?dd_cd=01&dd_cd=03&dd_cd=10&format=g...

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LOCATION--Lat 42° 34’10", long 71° 01’39", Essex County, Hydrologic Unit 01090001, on right bank in Peabody, 700 ft downstream from Boston Street Bridge at South Middleton, 1.3 mi downstream from Wills Brook, and 2 mi south of Middleton.
DRAINAGE AREA--44.5 mi2.
PERIOD OF RECORD--Discharge: June 1938 to current year.
Water-quality records: Water years 1957, 1959, 1999.
REVISED RECORDS--WSP 1301: 1942(M). WSP 1621: 1938–58 (monthly runoff). WDR MA-RI-84-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 44.97 ft above sea level (Massachusetts Geodetic Survey benchmark.)
REMARKS--Flow affected by upstream withdrawals for municipal supply of Lynn, Lynnfield, North Reading, and Wilmington. Occasional regulation by mill upstream Diversions upstream for municipal supply of Reading, Lynn, and Peabody.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources and Department of Environmental Protection, Office of Watershed Management