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  • Notice - The USGS Water Resources Mission Area's priority is to maintain the safety and well-being of our communities, including providing critical situational awareness in times of flooding in all 50 U.S. states and additional territories. Our hydrologic monitoring stations continue to send data in near real-time to NWISWeb, and we are continuing critical water monitoring activities to protect life and property on a case-by-case basis. The health and safety of the public and our employees are our highest priorities, and we continue to follow guidance fromthe White House, the CDC, and state and local authorities.

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ICE EFFECTS ON STREAMFLOW

The formation of ice on rivers can cause discharge values to appear unusually high. Display of these erroneous discharge data may result in improper assessment of flow conditions and misuse of the data. For this reason, display of discharge values for streams significantly affected by ice may be disabled from view. Display of discharge data will resume when ice conditions are no longer present. Discharge values for streams minimally affected by ice will continue to be displayed. Flows for streams with these conditions appear to increase during the night and decrease to near-base-line conditions around midday. To estimate the correct discharge for these streams, use the flow rate that corresponds to the bottom of the discharge curve, rather than the peak that corresponds to the top of the curve. Note that this method of estimation is possible only when no surface runoff is occurring. Daily mean discharges for periods of both significant and minimal ice-effect will be estimated and published in the Annual Water-Data Report for the water year in which they occurred.


* IMPORTANT: Next Generation Station Page

USGS 01104480 STONY BROOK RESERVOIR AT DAM NEAR WALTHAM, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Middlesex County, Hydrologic Unit 01090001, 10 ft upstream of bridge on River Road, 300 feet downstream of gatehouse outlet from Stony Brook Reservoir, and 2.0 mi southwest of Waltham.
DRAINAGE AREA--23.7 mi2.
PERIOD OF RECORD--October 1999 to current year.
GAGE--Data Collection Platform, reservoir-stage monitor, air temperature monitor, and a heated tipping-bucket precipitation gage equipped with a wind shield. Elevation of gage is 43 ft above sea level (from topographic map). Telephone telemeter at station. Datum of gage is referenced to the City of Cambridge datum, subtract 10.84 feet to elevations to adjust to National Geodetic Vertical Datum of 1929.
REMARKS--Downstream flow affected by regulation of dam 500 ft upstream at outflow of Cambridge Reservoir.
COOPERATION BY--Cambridge Water Department

Daily and unit values precipitation data are calibrated and quality assured prior to publication by the Massachusetts-Rhode Island Water Science Center. Data are available upon request.

Available Parameters Available Period
  
2008-05-23  2016-10-19
2007-10-01  2020-04-02
2010-11-30  2018-04-05
2012-10-01  2017-01-27
2010-09-20  2020-04-02
1999-08-06  2020-04-02
2007-10-01  2020-04-02
2007-10-01  2020-04-02
2008-05-23  2016-10-19
2007-10-01  2020-04-02







 (7)
 

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


Temperature, air, degrees Celsius

Most recent instantaneous value: 8.4 04-02-2020   12:45 EDT
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Precipitation, total, inches

Most recent instantaneous value: 0.00 04-02-2020   12:45 EDT
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Discharge, cubic feet per second

Most recent instantaneous value: 64.1 04-02-2020   12:00 EDT
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Daily discharge, cubic feet per second -- statistics for Apr 2 based on 20 water years of record more
Min
(2006)
25th
percen-
tile
Median Most Recent
Instantaneous
Value Apr 2
Mean 75th
percen-
tile
Max
(2010)
0.25 24 50 64.1 106 168 498


Elevation of reservoir water surface above datum, feet

Most recent instantaneous value: 78.66 04-02-2020   12:45 EDT
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Gage height, feet

Most recent instantaneous value: 1.75 04-02-2020   12:00 EDT
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Reservoir storage, million gallons

Most recent instantaneous value: 363.7 04-02-2020   12:45 EDT
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