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USGS 01104460 STONY BROOK AT RT 20 AT WALTHAM, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42o22'08", long 71o16'16", Middlesex County, Hydrologic Unit 01090001, 200 ft downstream of State Highway 20, 1,000 ft upstream from Stony Brook Reservoir, and 1.8 mi west of Waltham.
DRAINAGE AREA--22.0 mi2.
PERIOD OF RECORD--October 1997 to September 1998; August 2002 to current year.
GAGE--Data Collection Platform, water-temperature, specific conductance, pH, and turbidity water-quality monitor, with telephone telemeter. Datum of gage is 89.20 ft above NAVD 1988, estimated from topographic map. Datum of gage previously reported as 90 ft above NGVD 1929, estimated from topographic map.
REMARKS--Flow affected by regulation of dam 2.6 mi upstream on Hobbs Brook at outflow of Cambridge Reservoir.
COOPERATION BY--Cambridge Water Department

Available Parameters Available Period
  
2007-10-01  2024-12-01
2007-10-01  2024-12-01
2007-10-01  2024-12-01
2007-10-01  2024-12-01
2009-10-28  2024-12-01







 (7)
 
  -- or --

 

 
Summary of all available data for this site
Instantaneous-data availability statement

Temperature, water, degrees Celsius
Most recent instantaneous value: 3.2 12-01-2024   04:10 EST
Graph of Temperature, water, degrees Celsius

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Discharge, cubic feet per second, [(2)]
Most recent instantaneous value: 8.40 12-01-2024   04:10 EST
Graph of Discharge, cubic feet per second, [(2)]

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Daily discharge, cubic feet per second -- statistics for Dec 1 based on 24 water years of record more
Min
(2008)		 Most Recent
Instantaneous
Value Dec 1		 25th
percen-
tile		 Median Mean 75th
percen-
tile		 Max
(2019)
6.91 8.40 14 27 36 53 119

Gage height, feet
Most recent instantaneous value: 4.85 12-01-2024   04:10 EST
Graph of Gage height, feet

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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
Most recent instantaneous value: 497 12-01-2024   04:10 EST
Graph of Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

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Chloride, water, filtered, estimated by regression equation, milligrams per liter
Most recent instantaneous value: 120 12-01-2024   04:10 EST
Graph of Chloride, water, filtered, estimated by regression equation, milligrams per liter

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