U.S. sets seismic mitigation bid date for 1,076-MW Bonneville

The Corps of Engineers has set a deadline for bids to perform seismic mitigation work on the Ambursen Section of 1,076.6-MW Bonneville Lock and Dam on the Columbia River in Oregon. Bids are due Jan. 19, 2010.
The Corps previously issued a pre-solicitation notice anticipating bids would be due Dec. 31, 2009. (HydroWorld 11/23/09) The work entails filling the north wall of the old navigation lock, referred to as the Ambursen Section, with concrete to reduce the risk of failure during design seismic loading at Bonneville. Monoliths 20-25 of the old lock north wall are hollow sections. They are to be filled with concrete to form new gravity dam sections.

The work, which is valued at between $5 million and $10 million, involves foundation preparation, concrete and gravel placement, control and treatment of seepage water, anchoring, and grouting.

A solicitation notice may be obtained from the Federal Business Opportunities Internet site, www.fbo.gov, by entering Solicitation No. W9127N10R0002 in the “Keyword/Solicitation #” box. Bids are due Jan. 19.

For information, contact Barbara White, Corps of Engineers, Portland District, Contracting Division (CENWP-CT), P.O. Box 2946, Portland, OR 97208-2946; (1) 503-808-4621; E-mail: barbara.a.white@usace.army.mil.

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