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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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LOCATION--Lat 42° 25’14 ",long 71° 08’33", Middlesex County, Hydrologic Unit 01090001, on left bank upstream side of bridge at Route 60, between Arlington and Medford, Ma.
DRAINAGE AREA.--Undertermined.
PERIOD OF RECORD--Discharge: September 2015 to current year.
GAGE--Data Collection Platform and velocity sensor with high-data-rate satellite telemeter. Elevation of gage is Boston City Datum.
COOPERATION BY--Massachusetts Water Resources Authority and Mystic River Watershed Association.

REMARKS.--River level affected by gate operations at Amelia Earhart Dam, located about 4.5 miles downstream.
Boating safety tips
Available Parameters Available Period
2016-06-30  2020-01-09
2015-12-11  2020-01-09
2016-06-30  2020-01-09


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Summary of all available data for this site
Instantaneous-data availability statement
*** There are no data available on the Waterdata system for the time period specified,
    although data may be available in the files of the local USGS office operating the station.