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USGS Water-Year Summary 2024
01151500 OTTAUQUECHEE RIVER AT NORTH HARTLAND, VT
LOCATION - Lat 43°36'09", long 72°21'17" referenced to North American Datum of 1927, Windsor County, VT, Hydrologic Unit 01080106, on left bank, 100 ft upstream from US 5 bridge, 0.3 mi downstream from North Hartland Dam, 0.7 mi north of Depot Road and US 5 intersection in North Hartland, 1.2 mi upstream from mouth, and 3.7 mi southwest of Courthouse in White River Junction.
DRAINAGE AREA - 221 mi².
REVISIONS HISTORY - Datum of gage was revised on Sep 22, 2022 from 336.77 ft above NGVD of 1929 to 350.27 ft above NAVD of 1988.
SURFACE-WATER RECORDS
PERIOD OF RECORD - Discharge records: October 1930 to current year.
GAGE - Water-stage recorder. Datum of gage is 350.27 ft above North American Vertical Datum of 1988.
COOPERATION - U.S. Army Corps of Engineers, New England District and Essex Hydro Associates.
REMARKS - WATER YEAR 2014: Records good.
WATER YEARS 2015-2019 : Records good except estimated discharges, which are fair.
WATER YEAR 2020: Records good except for estimated discharges, and May 11 to Sept. 11, which are fair.
WATER YEARS 2021-2023: Records good.
Flow regulated by power plants upstream and by North Hartland Reservoir since March 1961; greater regulation by power plants at North Hartland Reservoir since July 1985. Small seasonal storage in reservoir at Plymouth.
WATER YEARS 2015-2019 : Records good except estimated discharges, which are fair.
WATER YEAR 2020: Records good except for estimated discharges, and May 11 to Sept. 11, which are fair.
WATER YEARS 2021-2023: Records good.
Flow regulated by power plants upstream and by North Hartland Reservoir since March 1961; greater regulation by power plants at North Hartland Reservoir since July 1985. Small seasonal storage in reservoir at Plymouth.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum stage since at least 1760, 21.5 ft in November 1927, from floodmarks, discharge 30,400 ft³/s, by computation of peak flow over dam.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 24,400 ft³/s, September 21, 1938, gage height, 17.68 ft, from rating curve extended above 6,200 ft³/s on basis of computation of flow over dam at gage heights 15.58 ft, 17.68 ft, and 21.5 ft; minimum, 0.2 ft³/s, July 6, 1984, during hydroelectric construction; minimum daily discharge, 3.8 ft³/s, July 3, 1933. Maximum discharge since construction of North Hartland Dam in March 1961, 6,170 ft³/s, March 17, 1977, gage height, 8.67 ft.
