Yakima Delta Habitat Management Unit closure extended through Aug. 21

U.S. Army Corps of Engineers, Walla Walla District
Published Aug. 13, 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 extended the temporary closure of the Columbia Park Trail parking lot and surrounding habitat at the Yakima Delta Habitat Management Unit through Aug. 21 for the ongoing Amon Creek restoration project.

This extension, prompted by an accelerated contractor schedule, will limit future closures.

The parking lot and HMU will partially reopen as soon as conditions are safe. USACE appreciates the public’s patience while construction is underway.

Last year, the U.S. Army Corps of Engineers (USACE), Walla Walla District, issued a five-year construction license to the Benton Conservation District (BCD) for the Amon Creek Habitat Restoration Project, a $1.2 million initiative aimed at improving fish habitat and migration conditions at the Yakima Delta Habitat Management Unit near McNary Lock and Dam.


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

Release no. 26-031