The U.S. Army Corps of Engineers seeks information on firms able to perform dam safety exploratory drilling and grouting at Rough River Dam in Falls of Rough, Ky. Responses are due Nov. 18.
The Corps completed a dam safety modification report on the Rough River flood control dam in 2012 addressing unacceptable risk due to foundation conditions found when a dam is constructed on karst geology (solutioned limestone). The report recommended major rehabilitation to ensure the structure’s integrity. Construction is to involve grouting of bedrock as an initial phase. Based on conditions encountered, a decision will be made whether to go to a second phase of constructing a deep concrete cutoff wall through the embankment and into the foundation rock.
In 2005, the Corps began evaluating risks at Corps-operated dams and developed a greater appreciation of the effect karst bedrock features can have. The Corps has conducted remedial work at 270-MW Wolf Creek Dam in Kentucky and 135-MW Center Hill Dam, 54-MW Dale Hollow Dam and 100-MW Old Hickory Dam in Tennessee.
In a sources sought notice, the Corps’ Louisville District now seeks information on small businesses able to perform exploratory drilling and grouting at 1,530-foot-long Rough River Dam. Responses will be used to determine the type of solicitation to be issued.
The contractor is to drill about 139 rock core holes to a maximum depth of about 275 feet through the embankment into bedrock. Additional holes might be required depending on initial results. A minimum of 2,150 cubic feet of grout is to be used on the project. An automated grouting monitoring and data collection system and an instrumentation monitoring program are to be used.
The sources sought notice may be obtained from the Federal Business Opportunities Internet site, www.fbo.gov, by entering the number W912QR15ROUGHRIVERDRILLINGANDGROUTING in the “Keyword/Solicitation #” box.
Responses are due by e-mail to the address below by 10 a.m., Eastern time, Nov. 18. For information, contact Christina M. Burchett, U.S. Army Corps of Engineers, Louisville District, 600 Dr. Martin Luther King Jr. Place, Room 821, Louisville, KY 40202-2267; (1) 502-315-6207; E-mail: email@example.com.