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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 422906072124301 MA-PHW 16 PETERSHAM, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42°29'06", long 72°12'43", Worcester County, Hydrologic Unit 01080204, 0.6 mi east of West Street Cemetery, 500 ft south of West Street, and 100 ft west of access road in Petersham, MA.
AQUIFER--Sand and gravel, glaciated regions; till deposits.
WELL CHARACTERISTICS--Drilled observation water-table well, depth 39 ft, screened 29 ft to 39 ft.
INSTRUMENTATION--Digital recorder with satellite telemeter, May 2012 to current year. Monthly measurements prior to May 2012.
DATUM--Elevation of land-surface datum of well is 790 ft above National Geodetic Vertical Datum of 1929, from topographic map. Measuring point: top of well casing, 3.00 ft above land-surface datum.
PERIOD OF RECORD-- January 1984 to current year.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources.


Click here to view values used in "Frimpter Method" estimates, OWmax and OWr values and topographic and lithologic settings.

Click here to view most recent monthly and daily groundwater levels (OWc values for "Frimpter Method" estimates) and for monthly and historical statistics.
This station managed by the Northborough MA Field Office.

Available Parameters Available Period
  
2012-05-17  2020-02-24








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Depth to water level, feet below land surface

Most recent instantaneous value: 13.11 02-24-2020   22:30 EST
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