The U.S. Army Corps of Engineers will conduct routine annual inspections, preventative maintenance and repairs at all navigation locks on the Columbia and Snake rivers during March.
All locks in the navigation system will close to recreational and commercial river traffic on March 5 at 6 a.m. to perform routine inspections and maintenance, as well as some non-routine work. Portland District locks are scheduled to reopen at 11:59 p.m. on March 19. Walla Walla District locks are scheduled to return to service at 11:59 p.m. on March 26. The additional days are necessary to perform non-routine work which will require more time to complete than the typical two-week-long routine maintenance outage. The non-routine work includes, but is not limited to, gate structural repairs and machinery replacement.
Walla Walla District dams with navigation locks include: McNary, located near Umatilla, at Columbia River mile 292; Ice Harbor; near Burbank, Wash.,, at Snake River mile 10; Lower Monumental, near Kahlotus, Wash.,, at Snake River mile 41; Little Goose, near Starbuck, Wash.,, at Snake River mile 70 and Lower Granite, near Pomeroy, Wash.,, at Snake River mile 107. Portland District’s Bonneville, The Dalles and John Day dams are located at Columbia River miles 145, 191 and 216, respectively.
