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The system was renamed the McAlpine Locks and Dam in 1960 in honor of William McAlpine, who was the only civilian to have ever served as district engineer for the Corps of Louisville. At present, the normal pool elevation is 420 feet (130 m) above sea level and the drainage area above the dam is 91,170 square miles (236,000 km 2 ).
The Cannelton Locks and Dam is a tainter-gated dam with two locks on the Ohio River, on the border between the U.S. states of Indiana and Kentucky. The dam is 2 miles (3.2 km) southeast of Cannelton, Indiana. Construction of the locks began in July 1963. The locks began operation in December 1966 and were completed April 1967.
The program's purpose was to replace the system of outdated wicket dams and small locks. The new dams were non-navigable and made of concrete and steel. Each dam has two adjoining locks, one 600-foot by 110-foot chamber, and a 1,200-foot by 110-foot chamber to accommodate fifteen barges that can lock through in one maneuver. [2]
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According to the US Army Corps of Engineers, the new dam and locks will reduce passage time to under one hour with the new system. [citation needed] Due to queuing at Lock and Dam Number 52 and Lock and Dam Number 53, it can take cargo traffic 15 to 20 hours each to transit the locks the Olmsted complex is intended to replace. [6]
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On September 27, 2009, the 1,200-foot lock failed and the gates "mismitered" due to a solenoid malfunction. The lock was repaired and reopened on March 1, 2010. The 1,200-foot lock chamber remained closed for 155 days, but the 600-foot lock continued to lock traffic albeit with delays. [3]