Ice Harbor, Lower Monumental
Locks at Ice Harbor and Lower Monumental dams, currently closed for annual maintenance,
have delayed their return-to-service dates to March 25.
Locks at the Ice Harbor and Lower Monumental dams will return to service a week later than planned due to repairs, according to the U.S. Army Corps of Engineers.
On March 3, all eight Corps navigation locks on the lower Columbia and lower Snake Rivers were closed to recreational and commercial river traffic for routine annual maintenance, inspection and repairs.
Ice Harbor, near Burbank, Wash., at Snake River mile 10, and Lower Monumental, near Kahlotus, Wash., at Snake River mile 41, were previously scheduled to reopen their locks March 18 but will now reopen March 25.
Work on the lock drain-fill valves at Ice Harbor will require the additional week to complete, according to the Corps. Inspection of Lower Monumental's upstream gate's lower seal indicates it has sustained damage from floating river debris and needs to be replaced.
Other locks in the Walla Walla District remain on schedule to reopen as originally planned -- McNary at 11:59 p.m. on March 18 and Lower Granite and Little Goose at 11:59 p.m. March 25.
"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 Corps stated in a press release.
learn more on topics covered in the film
see the video
read the script
learn the songs