Lake Taneycomo widened out to be a lake with the completion of the Powersite Dam, near Forsyth, Missouri, in 1913. From 1913 until 1958 it was a warm water lake. The United States Army Corps of Engineers completed the Table Rock Dam in 1958. This changed Tanycomo from a warm water lake to a very cold 58 degrees Farenheit (maximum). Gone were the Smallmouth bass the White River was famous for. But it turned Lake Tanycomo into a world class trout fishery. 