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DESCRIPTION:

Latitude 42°40'03",   Longitude 71°34'32"   NAD27

Middlesex County, Massachusetts, Hydrologic Unit 01070004

Drainage area: 435 square miles

Contributing drainage area: 316 square miles,

Datum of gage: 168.28 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1990-10-01	2025-07-18
Daily Data
Discharge, cubic feet per second	1935-10-01	2025-07-17	32797
Daily Statistics
Discharge, cubic feet per second	1935-10-01	2025-04-03	32693
Monthly Statistics
Discharge, cubic feet per second	1935-10	2025-04
Annual Statistics
Discharge, cubic feet per second	1936	2025
Peak streamflow	1936-03-20	2023-12-20	89
Field measurements	1936-03-13	2025-06-05	300
Field/Lab water-quality samples	1952-05-07	2024-02-06	189
Water-Year Summary	2005	2024	20
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