POMEROY, Wash. – Lower Granite Dam’s navigation lock, located at Snake River Mile 107.5 near Pomeroy, Wash., will close to all river traffic from 8 a.m. to 4 p.m. on Dec. 5, 6 and 7, according to operations officials with the U.S. Army Corps of Engineers’ Walla Walla District.
The eight-hour lock closures are necessary to enable contractors to complete upgrades to the emergency backup diesel generator for the navigation lock. The navigation lock will be fully functional after 4 p.m. on each of these days. Commercial navigation officials have been notified of these temporary lock closures.
Operations officials at the dam advise that work associated with these temporary navigation lock outages could affect public vehicle crossings at the dam – crossing delays of up to an hour or more may be necessary to accommodate heavy vehicle and equipment movement on the top of the dam. Travelers should keep in mind that suspension of dam crossings may be implemented at any time for extended periods due to operational needs, maintenance or construction-related activities or a change in security conditions at a dam. Travelers can call 1-888-DAM-INFO (1-888-326-4636) for the most current dam-crossing information.
Public Notices and other navigation lock information are available on the Walla Walla District website at www.nww.usace.army.mil/html/offices/op/t/navdata/default.html.
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Release no. 11-159