The Corps of Engineers plans to seek proposals to build a spill wall in a stilling basin at 1,779.8-MW The Dalles Dam, on the Columbia River in Washington. It plans to issue a solicitation May 1, calling for proposals in mid-June.
The Corps’ Portland District said the work will involve construction of a spill wall to aid fish passage in the stilling basin below the dam between Bays 8 and 9. The spill wall is built of pre-cast and cast-in-place concrete, ten feet wide, about 830 feet long, and 25 to 43 feet tall.
Work will involve fabrication, transportation, and setting of large pre-cast concrete cells, concrete demolition, anchor installation, and grouting, rock removal, underwater and above-water concrete placement, rock drilling, and installation, grouting, and tensioning of rock tendons.
The Corps estimates the magnitude of the job to be in the range of $25 million to $100 million. It tentatively plans to award the contract in July.
Spill to pass juvenile fish downstream will take place between two in-water work periods. The Corps expects that construction will extend through April 2010.
The Corps will post solicitation No. W9127N-08-R-0024 about May 1 on the Federal Technical Data Solutions Internet site, www.fedteds.gov. Proposals will be due about 45 days later. Vendors must register in the FedTeDS system to obtain a copy of the solicitation. A synopsis of the work is on the Federal Business Opportunities website, www.fbo.gov.
For information, contact Kenneth Piper, U.S. Army Corps of Engineers, Portland District, Contracting Division (CENWP-CT), P.O. Box 2946, Portland, OR 97208-2946; (1) 503-808-4619; E-mail: email@example.com.