The U.S. Army Corps of Engineers Nashville District has awarded the final contract for the Chickamauga lock replacement project to heavy-civil and marine contractor C.J. Mahan Construction Co., Urbancrest, Ohio.
The $192.1 million base contract covers construction of downstream approach walls, breaching the existing dam to connect the upstream approach to the new lock, bringing the new lock into operation, and removing the cofferdam. The deal has a total cumulative face value of $558.4 million.
The Chickamauga Dam is located at Tennessee River mile 471 in Chattanooga, Tenn. Its existing 360’x60′ lock chamber, built in 1940, can accommodate only one 195’x35′ jumbo barge per lockage…