Army Corps of Engineers to Close Both Ballard Locks for Salmon Project Aug. 20

Share Article

Both the large and small locks at the Hiram M. Chittenden Locks in Ballard will be closed to all marine traffic from 8 a.m. – 1 p.m. Aug. 20.

Both the large and small locks at the Hiram M. Chittenden Locks in Ballard will be closed to all marine traffic from 8 a.m. – 1 p.m. Aug. 20. The closure will allow dive teams to inspect an Adult Salmon Exclusion Structure immediately upstream of the locks. The structure prevents salmon access to the locks’ salt water return system and improves the viability of the salmon runs, which use the fish ladder to return upstream to their spawning grounds. The design allows for the doors to be manually closed during migration and opened when the salmon are not migrating.

In 2008, the Seattle District, U.S. Army Corps of Engineers, which operates the locks, installed this interim structure to prevent salmon from being trapped in the return system. With the doors closed during last year’s salmon migration, biologists only observed one Chinook and one Coho in the return system.

Due to the success in 2008, Seattle District closed the doors on the structure June 1 to prepare for the arrival of this year’s salmon run. To ensure the structure is working properly, dive teams will inspect it Aug. 20. The dive teams will make maximum efforts to complete the work as soon and as safely as possible.

Emergency vessels on an emergency call will have access to the locks during the closure. Boaters may call the lockmaster on duty at 206-783-7000 to verify that the locks are open.

For current information about activities at the locks, visit the Corps of Engineers Web site at http://www.nws.usace.army.mil and select “Dams and Locks” then “Lake Washington Ship Canal” from the left column.

The Seattle – Both the large and small locks at the Hiram M. Chittenden Locks in Ballard will be closed to all marine traffic from 8 a.m. – 1 p.m. Aug. 20. The closure will allow dive teams to inspect an Adult Salmon Exclusion Structure immediately upstream of the locks.

The structure prevents salmon access to the locks’ salt water return system and improves the viability of the salmon runs, which use the fish ladder to return upstream to their spawning grounds. The design allows for the doors to be manually closed during migration and opened when the salmon are not migrating.

In 2008, the Seattle District, U.S. Army Corps of Engineers, which operates the locks, installed this interim structure to prevent salmon from being trapped in the return system. With the doors closed during last year’s salmon migration, biologists only observed one Chinook and one Coho in the return system.

Due to the success in 2008, Seattle District closed the doors on the structure June 1 to prepare for the arrival of this year’s salmon run. To ensure the structure is working properly, dive teams will inspect it Aug. 20. The dive teams will make maximum efforts to complete the work as soon and as safely as possible.

Emergency vessels on an emergency call will have access to the locks during the closure. Boaters may call the lockmaster on duty at 206-783-7000 to verify that the locks are open. For current information about activities at the locks, visit the Corps of Engineers Web site at http://www.nws.usace.army.mil and select “Dams and Locks” then “Lake Washington Ship Canal” from the left column.

The Chittenden Locks, often referred to as the Ballard or Government Locks, safely transit about 60,000 vessels each year.

###

Share article on social media or email:

View article via:

Pdf Print

Contact Author

Andrea Takash

Public Affairs
U.S. Army Corps of Engineers
206-764-3750
Email >
Visit website