Peat is a brown to black, unconsolidated deposit of partially decomposed and disintegrated plant material that has accumulated in water-saturated environments, such as swamps, marshes, bogs, and fens. Because the location, thickness, quantity, and quality of peat deposits of the United States was known only in a general way, the US Department of Energy started a program in the late 1970's to inventory the fuel-grade peat deposits of the United States. The work presented in this report results from field work from 1979 to 1983 supported by grants from the US Department of Energy and the North Carolina Energy Institute. By Roy L. Ingram, 1987. 84 pages, 3 plates.