USGS Water-Year Summary 2024

01141500 OMPOMPANOOSUC RIVER AT UNION VILLAGE, VT

LOCATION - Lat 43°47'24", long 72°15'19" referenced to North American Datum of 1927, Orange County, VT, Hydrologic Unit 01080103, on right bank, 400 ft downstream from Avery Brook, 600 ft upstream from covered bridge at Union Village, 0.2 mi downstream from Union Village Reservoir, 3.5 mi upstream from mouth, and 3.7 mi southwest of State Highway 113 and US 5 intersection in East Thetford.

DRAINAGE AREA - 130 mi².

SURFACE-WATER RECORDS

PERIOD OF RECORD - Discharge records: September 1940 to September 1989 and October 2024 to current year. Partial-record station: October 1989 to September 2024. Peak Streamflow: Water years 1928, 1941 to 2016, and 2025 to current year.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 404.64 ft above North American Vertical Datum of 1988. September 1940 to September 1989, water stage recorder at site 500 ft downstream at different datum. 

COOPERATION - U.S. Army Corps of Engineers, New England District.

REMARKS - Flow regulated by Union Village Reservoir since October 1949. Some regulation by Lake Fairlee. Satellite telemeter data at station.

EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1869, about 14.5 ft in November 1927, from information by local resident (discharge not determined).

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,800 ft³/s, June 3, 1947, gage height, a9.65 ft, from rating curve extended above 2,400 ft³/s on basis of slope-area measurement of peak flow; minimum daily discharge, 2.0 ft³/s, October 20, 1949. Maximum discharge since construction of Union Village Reservoir in 1949, 2,440 ft³/s, April 19, 1997, gage height, 10.03 ft [a, datum then in use].

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water-Quality Field/Lab samples: Water years 1955, 1957 to 1959, 1966, 1968, 1969, 1975 to 1999.