The Jackson Levees are shown, Aug. 21, 2025, just below the Teton Range where more than 10,000 residents, along with homes, businesses, emergency facilities and farmland, are protected annually due to ongoing efforts from the Walla Walla District, U.S. Army Corps of Engineers.
The U.S. Army Corps of Engineers, Walla Walla District's Dworshak Dam, is shown where a flooded turbine bay, future location of the dam's fourth generating unit, is assessed during the first flooding of the bay in 50 years. This flooding was part of initial design work to test draft tube bulkheads and assess how the space could be converted into an operating hydropower unit.
On July 10, 2025, the U.S. Army Corps of Engineers, Walla Walla District, celebrated the 3,200-feet-long Lower Granite Lock and Dam’s 50 years of service to the Pacific Northwest along with the generations of people who made it possible. Lower Granite Lock and Dam, located on the Snake River in southeastern Washington, includes a dam, navigation lock, powerhouse, fish ladder, and associated facilities. The project provides hydropower, navigation, flood risk management, fish and wildlife habitat, recreation, and incidental irrigation. The dam spans approximately 3,200 feet and has an effective height of 100 feet. It is a concrete gravity structure with an earthfill right abutment embankment.
Every year World Ranger Day is celebrated on July 31. The Walla Walla District's own Natural Resource Specialists oversee recreation across the District’s 107,000 square miles, where over eight million guests visit annually.
The Walla Walla District constructs, operates, maintains, and secures multipurpose infrastructure to energize the economy, reduce flood risk, and serve as stewards of water resources for the Snake River Basin and the Nation.

News Releases

Mill Creek diverting flows into Bennington Lake during atmospheric river
3/13/2026
WALLA WALLA, Wash. – The U.S. Army Corps of Engineers Walla Walla District began diverting water from Mill Creek into Bennington Lake at approximately 11:50 a.m. today as flows increased due to...
Flood-risk management releases from Lucky Peak Dam expected soon
3/13/2026
BOISE, Idaho — The U.S. Army Corps of Engineers, Walla Walla District, anticipates starting flood-risk management releases from Lucky Peak Dam as early as Thursday, March 26...
USACE to host Boise River Flood Risk Management Information session at Lucky Peak Dam
3/9/2026
BOISE, Idaho — The U.S. Army Corps of Engineers, Walla Walla District, invites members of the public and media to attend an informational event at Lucky Peak Dam to learn how the Boise River system...