Melvin Price Locks and Dam

Melvin Price Locks and Dam is a dam and two locks at river mile 200.78 on the Upper Mississippi River, about 17 miles (27 km) north of Saint Louis, Missouri. The collocated National Great Rivers Museum  [Wikidata], explains the structure and its engineering.

Melvin Price Locks and Dam
Melvin Price Locks and Dam (Lock and Dam number 26)
Location of Melvin Price Locks and Dam in Illinois
Location	Alton, Illinois / West Alton, Missouri, USA
Coordinates	38°52′09″N 90°09′13″W
Construction began	1978
Opening date	1989
Operator(s)	U.S. Army Corps of Engineers, St. Louis District
Dam and spillways
Impounds	Upper Mississippi River
Length	1,160 feet (353.6 m)
Reservoir
Creates	Pool 26
Total capacity	238,000 acre⋅ft (0.294 km3)
Catchment area	171,470 sq mi (444,100 km2)

Lock 26
38°52′09″N 90°09′13″W
Waterway	Mississippi River
First built	1979
Length	1,200 feet (370 m) main, 600 feet (180 m) auxiliary lock
Width	110 feet (34 m) main, 110 feet (34 m) auxiliary

Background

Construction began in 1979, the main lock opened in 1990, and the full structure was completed in 1994. It replaced the earlier Lock and Dam No. 26, demolished in 1990, and is the first replacement structure on the Upper Mississippi River nine-foot navigation project. The main lock is 1,200 feet (370 m) long and 110 feet (34 m) wide; the auxiliary is 600 feet (180 m) long and 110 feet (34 m) wide. The main lock has a vertical lift gate and a miter gate while the aux. lock has two miter gates. The dam is 1,160 feet (350 m) long with 9 tainter gates, each 110 feet (34 m) wide by 42 feet (13 m) high.

It is named after Illinois Congressman Charles Melvin Price.

Gallery

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  Annotated image of the lock and dam
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  Dam and locks from Missouri shore
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  Close-up of the gates on the Melvin Price Lock & Dam
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