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John T. Myers Locks and Dam


 The John T. Myers Locks and Dam is located on the Ohio River about 3.5 miles downstream from Uniontown, Kentucky, at mile 846.0 below Pittsburgh, Pennsylvania. The navigation locks are located on the right bank or Indiana side of the river. The upper pool maintained above the dam extends upstream for a distance of 69.9 miles to the Newburgh Locks and Dam at mile 776.1.


The project was authorized as replacement for existing Locks and Dam 48 and 49 on September 17, 1958, by Secretary of the Army under authority of Section 6 of the Rivers and Harbors Act approved March 3, 1909, as amended.


Uniontown Locks’ construction started in June 1965. The locks were completed and placed in operation in December 1969. Dam construction started in May 1970, and was completed in 1977. John T. Myers Locks and Dam, formerly Uniontown Locks and Dam, was renamed on October 12, 1996, by direction of Public Law 104-303. Mr. Myers retired from the 104th Congress as Chairman of the House Appropriations Committee’s Energy and Water Development Subcommittee. Thanks in great part to his visionary leadership, this nation continued its wise investment in the infrastructure necessary to support inland navigation during his tenure. The Water Resources Development Act of 2000 authorized the John T. Myers Locks Improvement Project. This work will extend the 600‑foot x 110‑foot auxiliary lock chamber to a 1200‑foot lock. This will give the project twin 1200‑foot locks for efficient movement of projected increases in tow traffic, and will enable the facility to manage traffic during main lock closures without significant delays to navigation.

Locks and Dams

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Ohio River

Markland Locks and Dam
2760 US 42 West
Warsaw, KY 41095
(859) 567-7661

McAlpine Locks and Dam
805 North 27th Street
Louisville, KY 40212
(502) 776-6866

Cannelton Locks and Dam
5281 E. State Road 66
Cannelton, IN 47520
(812) 547-2962

Newburgh Locks and Dam
6877 State Road 66
Newburgh, IN 47630
(812) 853-8470

John T. Myers Locks and Dam
16501 Raben Road
Mt. Vernon, IN 47620
(812) 838-5836

Smithland Locks and Dam
1401 Smithland Dam Road
Brookport, IL 62910
(618) 564-2315

Olmsted Locks and Dam
567 New Dam Road
Olmsted, IL 62970
(618) 748-6400


Green River

Green River 1
5048 Dam and Lock Road
Reed, KY 42451
(270) 826-7360

Green River 2
695 W. 1st Street
Calhoun, KY 42327
(270) 273-3152

Lock Information

 Main Lock  110’ x 1200’
 Auxilliary Lock  110’ x 600’

Dam Information

Type Concrete fixed
weir with tainter gate
Length 3,504'
Upper pool 342'
Lower pool 324'
Number of gates 10
Height of gates 32'
Width of gates 110'