Walters Dam, also known locally as the Waterville Dam, is a hydroelectric dam in Haywood County of western North Carolina, in the Great Smoky Mountains. The concrete arch dam is 180 ft high by 800 ft long, impounding the Pigeon River, near Interstate 40. The brick powerplant actually stands 6.2 miles from the dam. A tunnel 6.2 miles long stretc…Walters Dam, also known locally as the Waterville Dam, is a hydroelectric dam in Haywood County of western North Carolina, in the Great Smoky Mountains. The concrete arch dam is 180 ft high by 800 ft long, impounding the Pigeon River, near Interstate 40. The brick powerplant actually stands 6.2 miles from the dam. A tunnel 6.2 miles long stretches north from the dam to the power plant, near the state line.