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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 01105600 OLD SWAMP RIVER NEAR SOUTH WEYMOUTH, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42°11’25", long 70°56’43", Norfolk County, Hydrologic Unit 01090001, on left bank between divided lanes of State Highways 3 and 128, 50 ft (revised) downstream from unnamed tributary entering from left, 0.4 mi upstream from Whitmans Pond, and 1.2 mi north of South Weymouth.
DRAINAGE AREA--4.39 mi2.
PERIOD OF RECORD--Discharge: May 1966 to current year.
Water-quality records: Water years 1967–68, 1999.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 69.21 ft above NAVD 1988, estimated from topographic map. Prior to May 12, 2020, datum of gage reported as 70 ft above NGVD 1929, estimated from topographic map. Prior to Aug. 3, 1996, at site 50 ft downstream at same datum.
REMARKS--Measured flows are prior to diversion at South Cove for municipal supply of Weymouth.
COOPERATION BY--Massachusetts Department of Conservation and Recreation, Office of Water Resources

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

Available Parameters Available Period
  
1987-10-01  2020-05-31
2007-10-01  2020-05-31







 (7)
 
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Summary of all available data for this site
Instantaneous-data availability statement

Discharge, cubic feet per second
Most recent instantaneous value: 4.54 05-31-2020   17:00 EDT
Graph of Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for May 31 based on 54 water years of record more
Min
(2009)		 25th
percen-
tile		 Most Recent
Instantaneous
Value May 31		 Median 75th
percen-
tile		 Mean Max
(1984)
1.57 2.7 4.54 4.6 6.9 11 271

Gage height, feet
Most recent instantaneous value: 2.71 05-31-2020   17:00 EDT
Graph of Gage height, feet

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