Upper Mississippi River Nine-Foot Channel Project, Lock & Dam Complex No. 20, Upper Mississippi River, Canton, Lewis County, MO

Significance: The U.S. Army Corps of Engineers Nine-Foot Channel Project (1927-1940) represents the culmination of a 100-year effort to improve the navigability of the Upper Mississippi River between the mouth of the Missouri River and Minneapolis, Minnesota. This specific project arose as a response to the farm crisis of the 1920s. Proponents of the New Deal adopted the project and gave speed to its construction as a means of providing public employment during the more general depression of the 1930s. By the 1940s, the completed project had converted over 650 miles of free-flowing river into a series of interconnected reservoirs which ensured enough water for fully loaded modern boats and barges to navigate the system. This constituted a significant alteration of the natural environment of the Upper Mississippi River. However, the project also brought economic benefits to the communities along and around the river corridor and lead to new recreational opportunities for the entire region. ...

Survey number: HAER MO-34

Building/structure dates: 1935 Initial Construction

navigation flood control canton upper mississippi nine foot channel project upper mississippi river nine foot channel project lock dam complex dam complex upper mississippi river lewis lewis county mississippi river missouri edwin e abbott historic american engineering record maxon construction company herbert g mccormick john h piel us army corps of engineers photo ultra high resolution high resolution library of congress

1969 - 1980

Library of Congress

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