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LOCATION--Lat 42° 25’55", long 71°
27’01", Middlesex County, Hydrologic Unit 01070005, on right
bank at Maynard, 150 ft upstream from bridge on State Highway 27, 1.7
mi downstream from Assabet Brook, and 7.1 mi upstream from confluence
with Sudbury River.
DRAINAGE AREA--116 mi2.
PERIOD OF RECORD--Discharge: July 1941 to current year.
Water-quality records: Water years 1954, 1967–74.
REVISED RECORDS--WSP 1231: 1945–46.
GAGE--Data Collection Platform with satellite telemeter. Datum
of gage is 141.33 ft above NAVD 1988. Datum previously reported as
142.12 ft above NGVD 1929.
REMARKS--Occasional diurnal fluctuation at low flow by mills
upstream; greater regulation prior to 1969. Since 1962, high flow
affected by retarding reservoirs and, since 1970, occasional release at
low flow by these reservoirs.
COOPERATION BY--Massachusetts Department of
Conservation and Recreation, Office of Water
Resources.
Boating safety tips |
Min (1965) | 25th percen- tile | Median | Most Recent Instantaneous Value Jan 24 | Mean | 75th percen- tile | Max (1958) |
---|---|---|---|---|---|---|
28.0 | 115 | 180 | 213 | 236 | 299 | 970 |