US Army Corps of Engineers
New England District

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Vermont River Basins

There are 19 principal river basins that lie entirely or partially in New England. Three river basins lie in parts of Vermont to include the Connecticut, Hudson and Lake Champlain (which is part of the St. Lawrence River System). All three basins have Corps' flood risk management projects within their drainage areas. Projects in the Connecticut River Basin were constructed by the New England District, while projects in the Hudson River and Lake Champlain Basins were constructed by the New York District.

Connecticut River Basin
The Connecticut River Basin, one of the largest river basins in New England, stretches from southern Quebec to Long Island Sound, off the Connecticut coast. It has a total length of 280 miles and a maximum width of 60 miles.

Of the 11,250 square miles in the basin, 1,436 square miles, or about 13 percent, lie in Connecticut; 3,928 square miles, or 35 percent lie in Vermont; 3,406 square miles, or about 27 percent l in New Hampshire; and 2,726 square miles, or 24 percent, lie in Massachusetts. About 114 square miles (one percent) are located in Quebec. In Vermont, the Connecticut River Basin occupies most of Essex, Caledonia, Orange, Windsor and Windham counties, and minor portions of Orleans, Washington, Addison, Rutland and Bennington counties.

Hudson River Basin
The Hudson River Basin lies mostly in New York State, with small portions covering areas in northern New Jersey, southwester Vermont, northwestern Massachusetts and western Connecticut.

The basin has a maximum length of 238 miles and a maximum width of 128 miles. Of the basin’s 13,366 square miles, 12,435 square miles (93 percent) lie in New York; 450 square miles (three percent) lie in Vermont; 255 square miles (two percent) lie in New Jersey; 190 square miles (one percent) lie in Massachusetts; and 36 square miles (.03 percent) lie in Connecticut. In Vermont, the basin covers most of Bennington County.

Lake Champlain Basin
The Champlain Basin covers all of northwestern Vermont and the northeastern corner of New York. It has a maximum length of 129 miles, stretching from Fort Ann, New York, to Ash Island (Ile aux Cendres) in the town of Noyan, Quebec. The basin has a maximum width of 105 miles.
Of Lake Champlain Basin’s 8,234 square miles (including Lake Champlain), 4640 square miles (56 percent) lie in Vermont, 3,065 square miles (37 percent) lie in New York, and 529 square miles (seven percent) lie in Canada. In Vermont, the basin covers at least part of 11 of the state’s 14 counties. These include all of Grand Isle, Chittenden, Franklin, Lamoille, and Washington counties; most of Addison and Rutland counties; the eastern third of Orleans County; northwestern Orange County; a small section of western Caledonia County; and the northern tip of Bennington County.


- Updated: 12 June 2015