Tennessee Power Co. built the 12.1-mile Great Falls-Spencer 46-kv Transmission Line in 1913 as part of a 151-mile line connecting the Ocoee No. 1 Hydroelectric Plant to Nashville. H.M. Byllesby & Co. designed the towers, and the Nashville Bridge Co. assembled them. The 44-foot-tall, 2,215-pound galvanized steel towers were designed to withstand severe weather conditions. Vanderbilt University football players helped clear trees and brush from the right-of-way. After completion of the powerhouse, the line was tied into Great Falls Hydroelectric Station. Tennessee Electric Power Co. bought the Great Falls-Spencer transmission line in 1922, and the Tennessee Valley Authority acquired it in 1939. The line remained in continuous service for 103 years until TVA replaced the old line with a 161 kV line supported on steel poles when Caney Fork Electrical Cooperation upgraded their Spencer, Tennessee, substation.