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ICE EFFECTS ON STREAMFLOW During winter, ice formation may cause stage and discharge values to appear higher than expected. Ice effects may be minor (occurring only at night and early morning) with baseline flows obvious, or the effects may be major (stage constantly increases over several days or weeks) resulting in greatly erroneous discharge. Streamgages experiencing minor ice conditions will continue to display stage and discharge values to enable users to estimate the approximate base-line stage and discharge. Streamgages experiencing major ice conditions will have the discharge record temporarily disabled to prevent use of erroneous discharge values. The discharge record will resume when it is determined that ice conditions are no longer present. Daily mean discharges during periods of ice effect will be estimated after detailed data analysis.

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. Elevation of gage is 90 ft above sea level (from topographic map). Telephone telemeter at station.
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
All 5 Available Parameters for this site
  
00010 Temperature, water 2007-10-01  2017-06-27
00060 Discharge 2007-10-01  2017-06-27
00065 Gage height 2007-10-01  2017-06-27
00095 Specific cond at 25C 2007-10-01  2017-06-27
99404 Chloride, wf, estim 2009-10-28  2017-06-27

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


Discharge, cubic feet per second

Most recent instantaneous value: 13.3 06-27-2017   09:00 EDT
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Daily discharge, cubic feet per second -- statistics for Jun 27 based on 16 years of record more
Min
(2015)
Most Recent
Instantaneous
Value Jun 27
25th
percen-
tile
Median Mean 75th
percen-
tile
Max
(2006)
10.2 13.3 21 26 35 44 91.9


Gage height, feet

Most recent instantaneous value: 5.02 06-27-2017   09:00 EDT
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