U.S. Army Corps Of Engineers, Pittsburgh District William S. Moorhead Federal Building, 1000 Liberty Avenue, Room 727, Pittsburgh, PA 15222-4186

Y -- DRAFT REQUEST FOR PROPOSAL, CONSTRUCTION OF NEW GATED DAM, BRADDOCK LOCK AND DAM, MONONGAHELA RIVER, PENNSYLVANIA DUE 082198 POC Michael S. DeStefano (412)395-7466 (F) 412-644-5109 A new Gated Dam at Braddock Locks and Dam (formerly Locks and Dam 2) on the Monongahela River will be constructed using innovative, in the wet, float in construction techniques. The new gated dam will consist of four 110 foot wide tainter gate bays separated by gate piers and will be situated between the existing lock on the right bank and a new abutment, currently under construction, on the left bank. A portion of the dam and a portion of each gate pier, normally constructed of mass concrete, will be designed and constructed as two hollow floating structures. One structure will be approximately 333 feet long by 106 feet wide by 40 feet high and the other one will be approximately 265 feet long by 106 feet wide by 22 feet high. These structures will be fabricated and partially assembled at an off-site location, floated to the project site and submerged onto a prepared foundation system. The Contractor will be required to locate and provide the off-site location where these structures will be fabricated. The foundation system will consist of an excavated area with sheet pile cut off walls and concrete drilled shafts. The dam structure will be reinforced concrete and the tainter gates will be structural steel fabrications. The estimated cost range for this project is between $25,000,000 and $100,000,000 and the time allowed for completion will be approximately 3 years. The procurement method used to select the Contractor will be a best-value trade-off process where price and other technical factors will be evaluated to make the final Contractor selection. The Draft Request for Proposal will be issued on or about July 31, 1998. The Pittsburgh District invites potential offerors to comment on all aspects of the draft solicitation. Comments will be used by the Pittsburgh District as appropriate to finalize the plans and specifications. The District will not provide responses back to comments as part of this draft Request for Proposal. The District is specifically interested in comments concerning the innovativeapproach being taken in this project, especially the off-site fabrication and delivery of the two large floating structures. The information contained in this synopsis and the draft Request for Proposal is accurate at the time of release and subject to change as the final plans and specifications are completed. The formal Request for Proposal is currently scheduled to be issued on or about December 22, 1998. Posted 07/09/98. (0190)

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