USGS Water-Year Summary 2020
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.
- WDR US-11-01: 2007 (P, DV).
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.
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.
PERIOD OF RECORD - Water years 1977-80, 1984 to current year.