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Lower Monumental Dam Lock Closed Wednesday by Staff Tri-City Herald, June 23, 2011

The navigation lock at Lower Monumental Dam near Kahlotus was closed to recreational boats Wednesday after loose concrete was discovered on the wall at an existing repair site inside the lock.

A section of aging concrete that is more than 40 years old has a history of cracking in recent years, creating potentially unsafe conditions for boats, said the Army Corps of Engineers.

Two of three phases of repairs to the site already are complete, with planning for the final phase under way.

Commercial vessels will be able to use the lock while repairs are in progress, but may experience some delays.

Related Pages:
Lower Monumental Lock Opening Again Delayed by Andy Porter, Walla Walla Union-Bulletin, 3/22/11
Opening of Lower Monumental Dam Lock Pushed Back by Staff, Walla Walla Union Bulletin, 3/14/11

Related Pages:
Extended Navigation Lock Outage US Army Corps of Engineers