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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.

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
All 2 Available Parameters for this site
  
00060 Discharge 2002-11-01  2017-07-28
00065 Gage height 2007-10-01  2017-07-28

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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: 6910 07-28-2017   02:30 EDT
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Daily discharge, cubic feet per second -- statistics for Jul 28 based on 14 years of record more
Min
(2012)
25th
percen-
tile
Median Most Recent
Instantaneous
Value Jul 28
Mean 75th
percen-
tile
Max
(2008)
2520 4260 6480 6910 10100 10600 43700


Gage height, feet

Most recent instantaneous value: 6.71 07-28-2017   02:30 EDT
Graph of  Gage height, feet

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