Owyhee Dam A project of the Bureau of Reclamation, they hired General Construction Company from Seattle to build the dam. Former Oregonian and then United States President Herbert Hoover dedicated what was the highest dam of its type in the world on July 17, 1932. Secretary of the Interior Ray Lyman Wilbur delivered Hoover's message at the dam. Owyhee's construction served as a prototype for the larger Hoover Dam on the Colorado River, including the use of refrigeration to cool the concrete. The dam cost $6,000,000, with the total reclamation project costing $18,000,000. Owyhee was designed by Frank A. Banks, who also
Lock and Dam No. 7 roller gates and 11 tainter gates, a segment of earth embankment long from the dam to French Island separated by a concrete spillway long, and another embankment long from French Island to Onalaska which has a concrete spillway long. The lock is wide by long. The lock and dam is one of the most visited because of its proximity to Interstate 90, and is clearly visible to travelers crossing the I-90 Mississippi River Bridge. Lock and Dam No. 7 Lock and Dam No. 7 is a lock and dam located on the Upper Mississippi River at river mile 702.5 near