USGS Water-Year Summary 2021
04288000 MAD RIVER NEAR MORETOWN, VT
LOCATION - Lat 44°16'38", long 72°44'35" referenced to North American Datum of 1927, Washington County, VT, Hydrologic Unit 04150403, on left bank, at downstream side of Munns Road bridge, 0.4 mi downstream of Welder Brook, 2.0 mi northeast of Moretown Mountain Road and State Highway 100B intersection in Moretown, 3.2 mi west of State Highway 100B bridge across Winooski River in Middlesex, and 3.8 mi upstream from mouth.
DRAINAGE AREA - 139 mi².
- WSP 744: Drainage area. WSP 854: 1934(M). WSP 1114: 1929, 1930(M), 1936-37.
PERIOD OF RECORD - Discharge records: October 1928 to current year.
GAGE - Water-stage recorder. Concrete control since October 13, 1933. Datum of gage is 543.93 ft above National Geodetic Vertical Datum of 1929 (levels by Vermont Department of Highway). July 6 to November 4, 1910, nonrecording gage at same site at different datum. November 20, 1928 to September 27, 1930, nonrecording gage at same site at present datum.
COOPERATION - Vermont Department of Environmental Conservation and USGS Groundwater and Streamflow Information Program.
EXTREMES OUTSIDE PERIOD OF RECORD - Maximum discharge since at least 1830, 23,000 ft³/s, November 3, 1927, gage height, 19.4 ft, from floodmarks, by computation of peak flow over dam at gage heights 9.98 ft, 11.51 ft, 16.34 ft, 19.4 ft.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 24,200 ft³/s, Aug 28, 2011, from rating curve extended above 7,700 ft³/s on basis of computation of flow over dam at gage-heights 9.98 ft, 11.51 ft, 16.34 ft, and 19.4 ft; gage height, 19.26 ft, from floodmarks; minimum discharge, 1.4 ft³/s, Oct 1, 1930.