Above: Workers prepare to pour concrete down the chute for the dam that formed Lake Niangua and supplied water to turn the generators. Below: These photos from 1930 show part of a generator arriving by truck and the crew that bored the tunnel. Photos courtesy Sho-Me Power. TUNNEL DAM Unique hydro project has powered the Ozarks for 93 years WATCH VIDEO Scan to see a video of Tunnel Dam 14 RURAL MISSOURI | SEPTEMBER 2023