USGS Current Conditions for USGS 01102345 SAUGUS RIVER AT SAUGUS IRONWORKS AT SAUGUS, 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 01102345 SAUGUS RIVER AT SAUGUS IRONWORKS AT SAUGUS, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42^o28'05", long 71^o00'27", Essex County, Hydrologic Unit 01090001, on left bank 20 ft upstream from Bridge Street and opposite from Saugus Ironworks National Historic Site, at Saugus, Mass.
DRAINAGE AREA--20.8 mi².
PERIOD OF RECORD--Stage and discharge, March 1994 to current year; water temperature and specific conductance, October 2001 to current year.
GAGE--Data Collection Platform with telephone telemeter. Datum of gage is 14.20 ft above NAVD 1988, estimated from topographic map. Datum previously reported as 15 ft above NGVD 1929, estimated from topographic map.
REMARKS--There is evidence of seasonal regulation by ponds upstream.
--Weather data collected by the meteorological station at the museum is provided for informational purposes only. The location of the station does not meet the strict installation requirements for weather stations established by the National Weather Service.
COOPERATION BY--Massachusetts Massachusetts Department of Conservationand Recreation, Office of Water Resources.