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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 ).
Lock and Dam No. 18 is a lock and dam located near Gladstone, Illinois and Burlington, Iowa on the Upper Mississippi River around river mile 410.5. The movable dam is 1,350 feet (411.5 m) and consists of 3 roller gates and 14 tainter gates. The lock is 110 feet (33.5 m) wide by 600 feet (182.9 m) long.
Before the McAlpine Locks and Dam were built, the Falls of the Ohio marked the most treacherous stretch of the entire 981-mile river. The falls were a “series of rapids, waterfalls, and chutes ...
The program's purpose was to replace the system of outdated wicket dams and small locks.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]
The first locks on the river, the Louisville and Portland Canal completed in 1830, were built within a bypass canal constructed to provide year-round navigation of the river. The falls were later largely covered by the McAlpine Locks and Dam , built by the Army Corps of Engineers.
The L & P Canal was still in operation in 2008 as part of the McAlpine Locks and Dam. In 1867 and 1868 a detailed and comprehensive study was conducted by the United States War Department on the feasibility of a "Ship canal around the falls of the Ohio". A report was submitted to congress in 1869 but was never acted upon. [6]
William J. McAlpine (1812–1890), American civil engineer Sir William McAlpine, 6th Baronet (1936–2018), British businessman William McAlpine (tenor) (1922–2004), Scottish tenor
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