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Water-Year Summary for Site 01188090

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
01188090 FARMINGTON RIVER AT UNIONVILLE, CT
LOCATION - Lat 41°45'19.97", long 72°53'13.35" referenced to North American Datum of 1983, Hartford County, CT, Hydrologic Unit 01080207, at right bank upstream from steel truss highway bridge on State Rt. 177 at Unionville, 4.1 mi downstream from Bunnell Brook and 3.0 mi upstream from Pequabuck River.
DRAINAGE AREA - 378 mi².
REVISIONS HISTORY - WDR US-11-01: 2007 (P, DV).
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1977 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 178.20 ft above National Geodetic Vertical Datum of 1929. Satellite telemetry at station.
REMARKS -

Peak flows are affected by flood-control regulation at Colebrook River Lake, Highland Lake Reservoir, Sucker Brook Dam, and Mad River Reservoir. The natural flow regime can be altered by regulation from water-supply reservoirs (Barkhamsted, Lake McDonough, East Branch, Nepaug, and West Branch), flood-control reservoirs (Colebrook River Lake, Highland Lake Reservoir, Sucker Brook Dam, and Mad River Reservoir), and by Otis Reservoir.

  • Water Years 2019-2023: Records good except for periods of estimated discharges, which are fair.
  • Water Years 2017-2018: Records good except for periods of estimated discharges, which are fair.
  • Water Year 2014 - 2016: Records good except for periods of estimated daily discharges, which are fair.

    • EXTREMES OUTSIDE PERIOD OF RECORD - Flood of Aug. 19, 1955 reached a stage of 32.9 ft from floodmark; discharge, 140,000 ft³/s, by slope-area measurement 3.8 mi upstream.
    WATER-QUALITY RECORDS
    PERIOD OF RECORD - Water years 1977-80, 1984 to current year.
    REMARKS - Water-quality records for this site published under station 01188085 from water year 1984 to water year 1990.