Corps to seek grouting at high-risk Clearwater Dam

The Corps of Engineers plans to solicit proposals for exploratory drilling and grouting for a concrete cutoff wall proposed for the �high-risk� Clearwater Lake Dam in Missouri. The solicitation is expected by June 15, with bids due Aug. 1.

The Corps recently identified Clearwater Dam, a flood control structure built on Missouri’s Black River in 1948, as one of six dams having a high risk of failure, from an initial screening of 130 dams. (HNN 5/2/07)

The Corps seeks a contractor to perform exploratory drilling and grouting along the entire length of the proposed cutoff wall. The government said the work is highly technical in nature and is to provide data to be used in the design and construction of the cutoff wall. Additionally, a substantial amount of grouting will be done in the contract period to prevent slurry and concrete loss during future construction of the wall.

The value of the contract for drilling and grouting work is between $10 million to $25 million. The cutoff wall is to be constructed as part of a Phase II contract, which will be handled separately. The Corps has said it expects to spend a total of $90 million to build the cutoff wall to control seepage and eliminate the risk of sinkholes.

The Corps already was aware of trouble at the dam, having discovered a sinkhole about 10 feet in diameter and 10 feet deep in the upstream face of the dam in January 2003, during a routine inspection.

Pre-solicitation notice W9127S-07-R-0001 said the government intends to evaluate proposals and award the contract without discussions with bidders, although it might request clarifications. Solicitation documents, plans, and specifications will be available only through the Federal Technical Data Solutions system. Bidders must register with FedTeDS on the Internet at www.fedteds.gov.

For information, contact Dudley Smith in the Corps’ Little Rock District, 700 W. Capitol, Little Rock, AR 72201; (1) 501-324-5720; E-mail: dudley.a.smith@us.army.mil.

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