Completed in 1944, Lake Texoma is the second largest lake in Texas and the eleventh largest reservoir in capacity in the United States. Its main purposes are flood control, power generation, and recreation. Lake Texoma was promoted largely through the efforts of Sam Rayburn, noted speaker of the house who represented District 4 in Congress for 49 years. In normal operation, the lake shoreline covers 550 miles, with the Red River arm in Texas and the Washita arm in Oklahoma covering 93,080 acres. The waters are impounded by Denison Dam. The creation of Texoma caused the relocation of railroads, highways, utilities, and cemeteries. The site of Preston, historically the Red River crossing for the Butterfield Stage, was submerged, as were the sites of Hagerman and part of Cedar Mills, Texas. In 1966, numerous recreation areas on Texoma drew 8,500,000 tourists, who could also visit Eisenhower State Park at the southeast end of the lake. The park was named in honor of Dwight D. Eisenhower, the thirty-fourth president of the United States. Texoma is one of more than 200 major inland lakes and reservoirs in Texas that contribute greatly to the state's economic and industrial growth.