Along the Snake River, the sound of heavy equipment echoes off the Teton and the Gros Ventre mountains as crews place fresh riprap along the Jackson Levees. For the U.S. Army Corps of Engineers (USACE), Walla Walla District, it is the latest effort in more than a decade-long undertaking to protect lives and property in Wyoming, part of USACE’s broader national mission to safeguard communities against flooding.