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Corps Re-Opens Columbia-Snake Locks by Staff Tri-City Herald, March 29, 2012

All navigation locks along the 350-mile-long federal Columbia-Snake river navigation system are back in business after a temporary closure to perform maintenance.

Each year, the Army Corps of Engineers suspends navigation service at dams on the lower Columbia and lower Snake rivers for annual inspections, repairs and maintenance on the locks at the eight dams between Portland and Lewiston.

The 2012 lock maintenance outage began March 6.

Navigation locks at Corps dams on the Columbia River reopened their locks March 20 after completing inspection and maintenance.

Dams on the Snake River reopened their locks Tuesday. The extra week was needed to replace downstream lock gate cables at Ice Harbor and perform lock wall repairs at Lower Monumental.

The concrete wall work at Lower Monumental's navigation lock marks the completion of a three-year phased project to repair cracking and spalling occurring along monolith 15 inside the locks.