the outlet of the spring lake. In 1925, the dam was purchased by the Arkansas-Missouri Power Company which constructed a hydroelectric plant at the dam. This plant supplied power to the surrounding area until 1972. Park In 1957, Mammoth Spring State Park was established. Surrounding land claims could not be acquired until 1972, however. Prior to 1972, the Mammoth Spring Cattle Sales Barn was co-owned and run by local entrepreneur Bert Kenneth Bishop and his associate, roughly on the site of where the Welcome Center now stands. Local farmers would routinely come to the site to sell livestock and other wares, such as Howard Green, who sold home-made walking sticks. Following this period in history, the State legislature voted to condemn the land and join the plot to the state park. The original Frisco Depot was restored in 1971 and now functions as a repository for artifacts and memorabilia related to the railroad and the spring area. The State Park provides a visitor's center, picnic areas, walking trails, and tour access to the dam and hydro plant. The United States Fish and Wildlife Service maintains a fish hatchery near the spring. See also List of Arkansas state parks List of Arkansas rivers List of Missouri rivers List of Ozark springs References External links Mammoth Spring State Park State parks of Arkansas Protected areas of the U.S. Interior Highlands Protected areas of Fulton County, Arkansas Springs of Arkansas National Natural Landmarks in Arkansas Hydroelectric power plants in Arkansas Buildings and structures in Fulton County, Arkansas Bodies of water of Fulton County, Arkansas