The Corps of Engineers’ Nashville District is preparing to issue a solicitation for proposals to construct a concrete seepage barrier at 270-MW Wolf Creek Dam, near Jamestown, Ky.
The Corps said it plans to issue the solicitation Dec. 5, setting Feb. 10, 2008, as the due date for proposals for the barrier, also called a cut-off wall. It estimated the work would cost in the range of $200 million to $500 million. The Corps expects to award the contract in May 2008.
The contractor is to complete a partially constructed, 4,500-foot-long grout curtain and install a 4,200-foot-long, two-foot-thick concrete seepage barrier, according to a pre-solicitation notice, No. W912P5-07-R-0005. The request for proposals is to be posted on the Federal Business Opportunities’ Internet site, www.fbo.gov. Enter the solicitation number, without hyphens, in the Quick Search box to locate the document.
The Corps previously identified Wolf Creek Dam as one of several dams critically near failure or having extremely high life or economic risk. An independent review panel subsequently reported the 5,736-foot-long, 258-foot-tall, earthfill and concrete gravity dam has a significant potential for failure. (HNN 5/2/07)
For information, contact James Choate, USA Engineer District, P.O. Box 1070, Nashville, TN 37202-1070; E-mail: email@example.com.
Corps awards $51 million for Wolf Creek grouting
The Corps also reported it awarded a $50.9 million contract to Advanced Construction Techniques Ltd., of Kettleby, Ontario, Canada, to build a double grout curtain at Wolf Creek. Advanced Construction Techniques is building the 4,250-foot-long double-line grout curtain on the upstream slope of the dam embankment and a work platform. (HNN 6/19/06) The cutoff wall is to be built between the two grout curtains as part of the government’s $309 million seepage repair plan.
Draft EIS eliminates new dam from consideration
In another development, the Corps released a document in which it eliminated from detailed study the idea of building a new roller-compacted-concrete dam downstream of the existing dam. The Corps passed over the idea in a draft environmental impact statement released in October in favor of detailed evaluations of other alternatives for addressing the seepage, such as operating the reservoir at lower elevations. Corps spokesman Bill Peoples said the Corps chose not to evaluate a new dam in its draft EIS because it is evaluating it in a separate study.
The draft EIS is available on the Internet at www.lrn.usace.army.mil/wolfcreek/documents.htm. Comments are due Nov. 26 to the Corps, Nashville District, Attn: CELRN-PM-P, P.O. Box 1070, Nashville, TN 37202-1070.