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ICE EFFECTS ON STREAMFLOW - During winter, ice formation may cause stage and discharge values to appear higher than expected. Ice effects may be minor (occurring only at night and early morning) with baseline flows obvious, or the effects may be major (stage constantly increases over several days or weeks) resulting in greatly erroneous discharge. Streamgages experiencing minor ice conditions will continue to display stage and discharge values to enable users to estimate the approximate base-line stage and discharge. Streamgages experiencing major ice conditions will have the discharge record temporarily disabled to prevent use of erroneous discharge values. The discharge record will resume when it is determined that ice conditions are no longer present. Daily mean discharges during periods of ice effect will be estimated after detailed data analysis.
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USGS 01172010 CONNECTICUT R AT I-391 BRIDGE AT HOLYOKE, MA

PROVISIONAL DATA SUBJECT TO REVISION

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LOCATION

LOCATION--Lat 42o11'26", long 72o36'32", Hampden County, Hydrologic Unit 01080201, on right bank, 300 ft upstream from the Interstate 391 bridge behind the flood barrier near water access through wall at flood barrier mile 85.
DRAINAGE AREA--8,332 mi2.
PERIOD OF RECORD--October 2002 to current year.
GAGE--Data Collection Platform with satellite and telephone telemeters at station.
REMARKS--Flow regulated by power plants, by First Connecticut and Second Connecticut Lakes, Lake Francis, Moore, and Comerford Reservoir, and other reservoirs, combined usable capacity, about 47 billion cubic feet.
COOPERATION--Holyoke Gas and Electric Co.

Photo of Connecticut River at gage location

Boating safety tips
This station managed by the East Hartford CT Field Office.

Available Parameters Available Period
  
2002-11-02  2019-12-14
2007-10-01  2019-12-14







 (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: 27400 12-14-2019   06:30 EST
Graph of  Discharge, cubic feet per second

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Daily discharge, cubic feet per second -- statistics for Dec 14 based on 17 water years of record more
Min
(2017)
25th
percen-
tile
Median Mean 75th
percen-
tile
Most Recent
Instantaneous
Value Dec 14
Max
(2011)
5860 8880 15200 19500 21800 27400 56300


Gage height, feet

Most recent instantaneous value: 12.21 12-14-2019   06:30 EST
Graph of  Gage height, feet

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