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.
Walla Walla District dams with navigation locks include: McNary Dam, 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 Dam, near Pomeroy, Wash., at Snake River mile 107. Portland District’s Bonneville, The Dalles and John Day navigation locks are located at Columbia River miles 145, 191 and 216, respectively.
All locks in the inland navigation system will close to recreational and commercial river traffic on Saturday, March 2, at 6 a.m. Ice Harbor, McNary, John Day, The Dalles and Bonneville locks are scheduled to reopen at 11:59 p.m. on Sunday, March 17. Lower Monumental, Lower Granite and Little Goose locks are scheduled to return to service at 11:59 p.m. on Sunday, March 24. The additional days at these dams 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 gate structural repairs, navigation lock concrete repair and equipment/machinery repair/replacement.
