Yakima Delta Habitat Management Unit to temporarily close for Amon Creek restoration

U.S. Army Corps of Engineers, Walla Walla District
Published Aug. 4, 2026
The Yakima Delta Habitat Management Unit temporary closure area is bordered in red. The site and Columbia Park Trail parking lot will be closed from Aug. 4 to 14 while crews mobilize equipment for the Amon Creek restoration project.

The temporary closure area at the Yakima Delta Habitat Management Unit is bordered in red. The U.S. Army Corps of Engineers is closing the area, including the Columbia Park Trail parking lot, from Aug. 4 to 14 to begin work on the Amon Creek ecosystem restoration project.

The U.S. Army Corps of Engineers has temporarily closed the Columbia Park Trail parking lot and surrounding habitat area at the Yakima Delta Habitat Management Unit from Aug. 4 to 14 to accommodate the start of a major ecosystem restoration project.

The closure ensures public safety while contractors mobilize equipment and begin work site preparation. Once the initial construction phases are complete, USACE will establish safety zones to allow the public to access parts of the area again.

The Walla Walla District is partnering with Benton Conservation, the Yakama Nation and Northwest Hydraulic Consultants to conduct the Amon Creek restoration. Crews are redirecting the creek to flow into the Yakima Delta at a new location, which will provide a better thermal refuge for salmon migrating through the river system.


Contact
Public Affairs Office
509-527-7020
cenww-pa@usace.army.mil

Release no. 26-027