Second lock at Locks and Dam no. 26 (replacement), Mississippi River, Alton, Illinois and Missouri :
final environmental impact statement.
St. Louis, Mo. : U.S. Army Corps of Engineers, St. Louis District, 
Inland water transportation > Inland water transportation / Mississippi River.
Dams > Dams / Illinois > Dams / Illinois / Alton.
3 v. :
ill., maps (some fold.) ;
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