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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 01095220 STILLWATER RIVER NEAR STERLING, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42o24'39", long 71o47'30", Worcester County, Hydrologic Unit 01070004, on left bank at downstream side of bridge on Muddy Pond Road, 1.5 mi upstream from mouth and 2.5 mi southwest of Sterling.
DRAINAGE AREA--29.1 mi2.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD--Low-flow partial record measurements in water years 1971-73, 1991-93. Continuous stage data recorder April 1994 to current year.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 399.28 ft above NAVD 1988, estimated from topographic map. Prior to May 13, 2020 datum of gage reported as 400 ft above NGVD 1929, estimated from topographic map.
REMARKS--Stage-discharge relation affected by seasonal backwater from aquatic vegetation and occasional backwater from beaver dams. Adjustments for backwater are included in the computed record.

WATER-QUALITY RECORDS

PERIOD OF RECORD--Water temperature and specific conductance, April 1998 to current year; precipitation October 1998 to current year.
INSTRUMENTATION--Water temperature and specific conductance monitor and heated tipping-bucket precipitation gage.
Daily and unit values for precipitaion are calibrated and quality assured prior to publication by the USGS MA-RI Field Office. Data are available upon request.

This gage is monitored in cooperation with the Massachusetts Department of Conservation and Recreation, Division of Water Supply Protection, Office of Watershed Management, with funding from the Massachusetts Water Resources Authority .

Link to Department of Conservation and Recreation

Link to Massachusetts Water Resources Authority

Photo of Stillwater River Gage. Link to the DCR.

Photo of Stillwater gage

Boating safety tips
This station managed by the Northborough MA Field Office.

Available Parameters Available Period
  
2007-10-01  2021-03-02
2007-10-01  2021-03-02
1994-04-22  2021-03-02
2007-10-01  2021-03-02
2007-10-01  2021-03-02







 (7)
 
  -- or --

 

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

Temperature, water, degrees Celsius
Most recent instantaneous value: 0.0 03-02-2021   02:30 EST
Graph of Temperature, water, degrees Celsius

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Precipitation, total, inches
Most recent instantaneous value: 0.00 03-02-2021   02:30 EST
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Discharge, cubic feet per second
Most recent instantaneous value: 78.4 03-02-2021   02:30 EST
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Daily discharge, cubic feet per second -- statistics for Mar 2 based on 26 water years of record more
Min
(2002)		 25th
percen-
tile		 Median Most Recent
Instantaneous
Value Mar 2		 Mean 75th
percen-
tile		 Max
(2010)
19.4 44 69 78.4 84 109 269

Gage height, feet
Most recent instantaneous value: 5.08 03-02-2021   02:30 EST
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Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius
Most recent instantaneous value: 147 03-02-2021   02:30 EST
Graph of Specific conductance, water, unfiltered, microsiemens per centimeter at 25 degrees Celsius

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