Bureau of Reclamation, Contracts Group, 1150 N. Curtis Rd., Boise, Idaho 83706-1234

Z -- BLACK CANYON DAM HIGH PRESSURE GROUTING REPAIR, BUREAU OF RECLAMATION, SNAKE RIVER WEST PROJECT, BOISE IDAHO SOL 1425-6-SI-10-07080 DUE 022096 POC Contracting Officer, Devon Scott Shelley, 208/378-5112 The solicitation will be issued on or about January 8, 1996--Not Set Aside--Estimated price range of the work is between $50,000 and $100,000-- first copy of the solicitation provided at no charge. The work to be performed under this solicitation consists of the following: Black Canyon Dam is a hydro-power dam and pumping plant located approximately 5 miles northeast of Emmett, Idaho. It was constructed in the early 1900's of reinforced concrete. Over the years at the interface between the concrete and embedded metal features, leaks and seeps have occurred. The reservoir level is maintained high year-round to optimize power generation. Because of this fact, there will not be an opportunity to de-water the structure to repair these leaks. This necessitates the use of long-hole grouting technology. There are two general areas that require this process. One is in the vicinity of the power-pumping penstock slide gates and the other is each of the four piers between the drum gates in the center of the dam. The grout that must be used at all locations shall be a polyurethane resin using water as the catalyst. Where access allows, the grout shall be applied using the long-hole injector system. Where access precludes use of this drilling system, grout shall be applied locally at the interior crack surface by drilling periodic injection holes at an angle to the surface from above and below the crack, and then pumping grout under pressure. After the drilling is completed, preparation for the grouting shall include air-developing, using pressurized air or air-water mix to clean out removable soft material. Where the long-hole system is used, core sampling shall be done as the holes are drilled to indicate the size and number of fissures intersecting each hole. See Numbered Note 22. (0361)

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