Upper Mississippi River 9-Foot Channel, Lock & Dam No. 9, Lynxville, Crawford County, WI

See HAER MN-20, Upper Mississippi River Nine-Foot Channel Project History, Locks and Dams 3-10, for additional information.

Significance: The Upper Mississippi River Lock and Dam Project represents one of the largest and most ambitious of such undertakings. With roots in the Progressive Era, the project was adopted by New Deal proponents to serve the needs of public employment during the Great Depression. Its successful completion turned the upper reaches of one of the world's largest rivers into a intra-continental canal and settled the question of a fully navigable interior river system through the Midwest. Completion of the system helped allay economic inequities in commercial rail and water freight brought about as a result of the opening of the Panama Canal. Although significantly altering the environment of the upper Mississippi, the project also served as an impetus for the upgrading of municipal drinking water and sewage disposal systems, as well as providing new recreational opportunities, thus, in the end, proving generally beneficial to public welfare.

Survey number: HAER WI-50

Building/structure dates: 1936- 1940 Initial Construction

Building/structure dates: 1953 Subsequent Work

Building/structure dates: 1968 Subsequent Work

Building/structure dates: 1975 Subsequent Work

Building/structure dates: 1979 Subsequent Work

Building/structure dates: 1980 Subsequent Work

Building/structure dates: 1982 Subsequent Work

Building/structure dates: 1984 Subsequent Work

lock gates dams hydraulic engineering navigation new deal economic development public utilities crawford county upper mississippi upper mississippi river channel lock dam lynxville crawford mississippi river wisconsin tainter gates locks hydraulic facilities rolling lock gates reinforced concrete construction control rooms miter gates dikes engineering cranes lockkeepers houses colonial revival architectural elements storage yards ashworth hawkinan company central pile and foundation company dubuque boat and boiler company w j durnford clayton fraser j j harker historic american engineering record lacrosse dredging company mcclintic marshall corporation william patrick o brien h e pederson rc mahon company fred j rogers e c schroeder us army corps of engineers united construction company walter w magee company photo ultra high resolution high resolution river system library of congress railway photo archive

1969 - 1980

Library of Congress

http://www.loc.gov/

No known restrictions on images made by the U.S. Government; images copied from other sources may be restricted. http://www.loc.gov/rr/print/res/114_habs.html