20-029 Summer recreational vessel lockage schedule has begun

Published June 4, 2020

COLUMBIA & SNAKE RIVERS, Ore. & Wash. – For the Walla Walla District, Corps of Engineers, May 15 marked the start of the summer schedule for recreational boaters using navigation locks to travel past U.S. Army Corps of Engineers dams on the Columbia and Snake rivers, according to Corps navigation planners.

Walla Walla District dams with locks include McNary Dam, on the Columbia River near Umatilla, Oregon and the Lower Snake River Dams: Ice Harbor Dam, near Burbank, Washington; Lower Monumental Dam, near Kahlotus, Washington; Little Goose Dam, near Starbuck, Washington; and Lower Granite Dam, near Pomeroy, Washington.

The summer lockage schedule applies to all other Corps dams along the Columbia-Snake river system.



9 a.m.                    

9:30 a.m.

12 p.m.                

12:30 p.m.

3 p.m.                  

3:30 p.m.

6 p.m.                  

6:30 p.m.

9 p.m.                  

9:30 p.m.

This schedule will remain in effect through Sept. 14. Recreational vessel operators have precedence over commercial vessels during the designated times. At other times, recreational vessels may be allowed to lock through with commercial craft at the discretion of the lockmaster.

Lockages outside the scheduled times will be considered for flotillas or other organized events sponsored by yacht clubs, marinas and other groups, provided 24-hour advance arrangements are made with the appropriate location. Call to schedule special lockages:

Lock and Dam

Phone number

Radio Call Sign             (contact lock operator using Marine VHF-FM Channel 14)



WUJ 41

Ice Harbor


WUJ 42

Lower Monumental


WUJ 43

Little Goose

509-399-2233 ext. 231

WUJ 44

Lower Granite              


WUJ 45


Everyone in the vessel must be wearing a personal floatation device throughout the duration of the lockage. All vessel owners and operators lock through at their own risk and must comply with the Corps’ safe-lockage policy. Portland District’s navigation information and the brochure "How to Lock Through" is available at www.nww.usace.army.mil/Portals/28/docs/navigation/locking.pdf.

Nine million tons of commercial cargo, valued around $3 billion, is transported through the lock system each year, according to navigation industry data. The Columbia-Snake navigation system is part of a larger waterborne commerce system that is vital to the economic health of the Pacific Northwest. This import/export gateway allows river transport 465 miles inland from the Pacific Ocean to Lewiston, Idaho.

Walla Walla District’s recreational vessel lockage information is online at www.nww.usace.army.mil/Missions/Navigation/.  


Release no. 20-055