Annual Report of the Chief of Engineers
on Civil Works Activities
Fiscal Year 1988
Department of the Army Corps of Engineers
Extract Report of Walla Walla District

Jackson Hole, Wyoming

Location. On both banks of the Snake River, Teton County, west of Jackson, Wyoming.

Existing project. 23.5 miles of levees consisting of: Right bank - a levee with full riprap protection from 10 miles upstream of the Jackson-Wilson Highway Bridge, to 3.5 miles below, a total of 13.5 miles. Left bank - a levee with full riprap protection extending from 10 miles upstream of Jackson-Wilson Highway Bridge to 5 miles upstream and extending 1.5 miles immediately upstream from the same ridge to 3.5 miles below the bridge, for a 10-mile total length.

Project authorized by Public Law 516, Flood Control Act of 1950 for flood control protection by channel improvements consisting of channel rectification, levees, and revetment along Snake River in the vicinity of Wilson, Wyoming. Public Law 99-662 modified the original Public Law 516 to provide that the operation, maintenance, modifications, and additions to the project become Federal responsibility.

Local cooperation. Non-Federal sponsors shall pay the initial $35,000 in cash or materials of any such costs expended in any one year.

Operations during fiscal year. Existing levee system is being analyzed to determine what modifications may be necessary to maintain the integrity of the system, reduce operation and maintenance costs, and reduce future emergency repairs.