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DESCRIPTION:

Latitude 42°26'50.50",   Longitude 71°08'18.90"   NAD27

Middlesex County, Massachusetts, Hydrologic Unit 01090001

Drainage area: 24.5 square miles

Contributing drainage area: 23.9 square miles,

Datum of gage: -0.80 feet above   NAVD88.

AVAILABLE DATA:

Data Type	Begin Date	End Date	Count
Current / Historical Observations     (availability statement)	1990-04-03	2026-01-19
Daily Data
Discharge, cubic feet per second -- MYSTIC VALLEY PARKWAY	1939-04-16	2026-01-18	31684
Daily Statistics
Discharge, cubic feet per second -- MYSTIC VALLEY PARKWAY	1939-04-16	2025-08-11	31526
Monthly Statistics
Discharge, cubic feet per second -- MYSTIC VALLEY PARKWAY	1939-04	2025-08
Annual Statistics
Discharge, cubic feet per second -- MYSTIC VALLEY PARKWAY	1939	2025
Peak streamflow	1940-03-15	2021-10-31	81
Field measurements	1954-05-17	2025-11-20	286
Field/Lab water-quality samples (Legacy QW is frozen as of March 2024, newer data may be found on MLP)	1958-05-12	2007-08-30	337
Water-Year Summary	2005	2024	19
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