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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 01102500 ABERJONA RIVER AT WINCHESTER, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION--Lat 42°26’50.5", long 71°08’18.9", Middlesex County, Hydrologic Unit 01090001, on left bank, 0.3 mi downstream from Waterfield Street at Winchester.
DRAINAGE AREA--Total above gage, 24.7 mi2; net above gage, 24.1 mi2, excludes 0.6 mi2 drained by Winchester North Reservoir.
PERIOD OF RECORD--April 1939 to current year. Streamgage temporarily relocated to Mt. Vernon Street from September 2011 to April 2014 during river channel improvements for flood mitigation at Mystic Valley Parkway.
GAGE--Data Collection Platform with satellite telemeter. Datum of gage is 0.80 ft below NAVD 1988, estimated from digital map. From September 2011 to April 2014, when gage was temporarily relocated to Mt. Vernon Street, datum of gage was reported as 15 ft above NAVD 1988, estimated from digital map. Prior to September 2011, datum of gage reported as NGVD 1929, estimated from topographic map.
COOPERATION--Massachusetts Department of Conservation and Recreation, Division of Planning and Engineering.

This station managed by the Northborough MA Field Office.

Available Parameters Available Period
  
2020-11-04  2021-03-04
1990-04-03  2021-03-04
2014-05-01  2021-03-04







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

Precipitation, total, inches
Most recent instantaneous value: 0.00 03-04-2021   20:00 EST
Graph of Precipitation, total, inches

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Discharge, cubic feet per second, MYSTIC VALLEY PARKWAY
Most recent instantaneous value: 44.4 03-04-2021   20:00 EST
Graph of Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Mar 4 based on 81 water years of record more
Min
(1980)		 25th
percen-
tile		 Median Most Recent
Instantaneous
Value Mar 4		 Mean 75th
percen-
tile		 Max
(1972)
3.30 24 39 44.4 55 70 300

Gage height, feet, MYSTIC VALLEY PARKWAY
Most recent instantaneous value: 7.72 03-04-2021   20:00 EST
Graph of Gage height, feet

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