US ARMY CORPS OF ENGINEERS, PORTLAND DISTRICT, PO BOX 2946, PORTLAND OR 97208-2946

Y -- BONNEVILLE JUVENILE FISH BYPASS OUTFALLS SOL DACW57-97-B-0027 DUE 091697 POC Contract Specialist MARTINA HARWOOD (503) 808-4614 (Site Code DACW57) Construct high and low level juvenile bypass outfall structures downstream of Bonneville Dam that extend out into the Columbia River approximately 106 meters and 125 meters, respectively. The outfall construction area is located in deep, fast water with varying tailwater elevations. The project is located near the west end of the Columbia River Gorge with the potential for inclement weather. A staging area and disposal area will be available on shore. The outfalls structures include six in-water, large-diameter shafts socketed into bedrock and two land-based spread footings. The shafts shall be installed through river bottom silts, sands, gravel, and some boulders, upwards of 32 meters and socketed 4 meters to 11 meters into bedrock. The six shafts consist of Government-furnished permanent steel casings 3048 mm in diameter and 25 mm thick, filled with reinforced tremie concrete, with installed shaft lengths ranging from 39 meters to 57 meters long. The two land-based spread footings are comprised of reinforced concrete. The outfalls superstructures are comprised of twin precast, post-tensioned reinforced concrete box girder sections that range in length from 26 meters to 55 meters. These twin box girders bear upon reinforced concrete crossed members sitting atop the six long-diameter shafts and reinforced concrete pedestals at the two land-based spread footings. The inverts of the high and low outfall box girders are approximately 25 meters and 22 meters, respectively, above the bottom of the Columbia River. The Contractor shall be required to (a) commence work under this contract within 10 calendar days after the date the Contractor receives Notice to Proceed, (b) to prosecute the work diligently, and (c) to complete the entire work not later than 515 calendar days after receipt of the Notice to Proceed. All in-water work shall be completed within two separate in-water work periods from December through February. The time stated for completion included final cleanup of the premises. Technical questions may be addressed to Lance Helwig (503) 808-6171 or Scott Chun (503) 808-6910. A draft solicitation may be issued for comment to interested offerors. IFB available on or about August 18, 1997 at a cost of $53.00 per set.Tentative bid opening date is September 16, 1997. This procurement is open to both large and small business concerns. The size standard for which is a concern including all affiliates, with average annual sales or receipts for the preceding three years not in excess of $17 million. All responsible sources may submit a bid which will be considered by the agency. Please indicate business size when requesting bid documents. SIC 1629. (0183)

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