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DESCRIPTION:

Latitude 42°38'45",   Longitude 71°17'56"   NAD27

Middlesex County, Massachusetts, Hydrologic Unit 01070006

Drainage area: 4,635 square miles

Contributing drainage area: 4,421 square miles,

Datum of gage: 4.37 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1990-10-01	2026-01-20
Daily Data
Discharge, cubic feet per second	1923-06-01	2026-01-19	37489
Suspended sediment concentration, milligrams per liter	1967-04-03	1972-09-29	1922
Suspended sediment discharge, short tons per day	1967-04-03	1972-09-29	2005
Daily Statistics
Discharge, cubic feet per second	1923-06-01	2024-10-23	37036
Suspended sediment concentration, milligrams per liter	1967-04-03	1972-09-29	1922
Suspended sediment discharge, short tons per day	1967-04-03	1972-09-29	2005
Monthly Statistics
Discharge, cubic feet per second	1923-06	2024-10
Suspended sediment concentration, milligrams per liter	1967-04	1972-09
Suspended sediment discharge, short tons per day	1967-04	1972-09
Annual Statistics
Discharge, cubic feet per second	1923	2025
Suspended sediment concentration, milligrams per liter	1967	1972
Suspended sediment discharge, short tons per day	1967	1972
Peak streamflow	1852-04-23	2020-12-27	99
Field measurements	1938-09-23	2025-12-11	218
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1953-10-19	2024-02-02	324
Water-Year Summary	2005	2024	20
Revisions	Loading...

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