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DESCRIPTION:

Latitude 42°38'12",   Longitude 71°18'09"   NAD27

Middlesex County, Massachusetts, Hydrologic Unit 01070005

Drainage area: 400 square miles

Contributing drainage area: 307 square miles,

Datum of gage: 67.41 feet above   NGVD29.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1990-09-30	2017-09-22
Daily Data
Discharge, cubic feet per second	1936-12-16	2017-09-21	29500
Daily Statistics
Discharge, cubic feet per second	1936-12-16	2016-10-10	29154
Monthly Statistics
Discharge, cubic feet per second	1936-12	2016-10
Annual Statistics
Discharge, cubic feet per second	1937	2017
Peak streamflow	1938-07-29	2016-04-11	79
Field measurements	1938-07-26	2017-08-07	193
Field/Lab water-quality samples	1952-10-21	2003-09-15	175
Water-Year Summary	2005	2016	12

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