USACE Walla Walla – Lower Granite Dam Navigation Lock Repairs

Under its second award from the USACE Walla Walla District, Tribal One is performing essential repairs to the Lower Granite Dam Navigation Lock on the Snake River in southeast Washington. Working in partnership with Structural Preservation Systems, LLC, the team is executing the project within the USACE’s scheduled outage window from February 24 through March 25.

Project activities include:

• Demolition and repair of parapet concrete wall sections
• Removal and replacement of selected horizontal wall armor
• Replacement of parapet armor plate angle caps
• Removal and replacement of damaged grout behind armor angles