USGS Current Conditions for USGS 01175670 SEVENMILE RIVER NEAR SPENCER, MA

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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.

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USGS 01175670 SEVENMILE RIVER NEAR SPENCER, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42^o15'53", long 72^o00'17", Worcester County, Hydrologic Unit 01080204, on left bank , downstream side of bridge on Cooney Road and 1.5 mi north of Spencer.
DRAINAGE AREA--8.81 mi².
PERIOD OF RECORD--Occasional low-flow measurements, water year 1960. October 1960 to current year. October and November 1960 monthly discharge only, published in WSP 1901.
REVISED RECORDS--WDR MA-RI-84-1, WDR MA-RI-03-1: drainage area.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 629.40 ft above NAVD 1988, estimated from digital map. Prior to May 21, 2020, datum of gage reported as 618.18 ft above NGVD 1929, estimated from topographic map. Datum of gage previously reported as 630 ft above NGVD 1929, estimated from topographic map. Prior to Sept. 25, 1984, at datum 8.83 ft higher.
REMARKS--Occasional regulation by ponds upstream since 1971.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office or Water Resources.