Bureau of Reclamation, PO Box 36900, Billings, Montana 59107-6900

Y -- TWIN BUTTES DAM MODIFICATION, SAN ANGELO, TEXAS SOL 1425-5-SP-60-07610 due 100595. Contact Mike Todd, Contracting Officer, Billings, Montana, 406/247-7810. The principle components of the work include the following: Construction of a cut-off wall on the upstream side of Twin Buttes dam by continuous slurry trench excavation with cement-bentonite as backfill or by panalized slurry trench construction with a soil-cement-bentonite mixture utilized as backfill. The cut-off wall will be 4 miles long and vary in depth from 70 to 115 ft. Connections to the dam abutments will be made by slurry trench excavation using plastic concrete as backfill. Related work includes construction and removal of cofferdams, control of water, installing geomembrane from the cut-off wall to the dam, placement and compaction of zone 1 material over the geomembrane, connecting the cut-off wall to the dam abutments, removal and replacement of riprap, temporary relocation and reinstallation of utilities and roadways, furnishing and installing embankment measurement points and vibrating wire piezometers. The estimated price of the work is over $10,000,000. Twin Buttes dam is located about 9 miles southwest of the City of San Angelo, Texas, on the Middle and South Concho Rivers. It is considered to be a high risk structure due to continuing seepage through the foundation, and operating levels have been restricted to elevation 1930. The dam, major facility of the San Angelo Project, provides a municipal and industrial (M&I) water supply for the City, irrigation for about 10,000 acres east of the City, flood control, and water for fish, wildlife, and recreation. The City operates and maintains the facility. This is a negotiated, competitive, firm-fixed price requirement. The Government will issue a Request for Proposals (RFP), and offerors will be required to submit technical and cost proposals in response to the RFP. A Technical Proposal Evaluation Committee will evaluate the technical proposals according to the following criteria: (1) Experience; (2) Technical plan for construction; (3) Construction management/scheduling; and (4) Safety. Solicitation packages will be available approximately August 20, 1995. Receipt of proposals is tentatively scheduled for 4:00 p.m., October 5, 1995, at the Bureau of Reclamation, Great Plains Regional Office, 316 North 26th Street, Billings, Montana. The solicitation package will be provided upon receipt of a nonrefundable check or money order in the amount of $100.00 for each set. After issuance, the solicitation may be viewed, without charge, at the office of the Bureau of Reclamation, at the Great Plains Regional Office, Room 2025, 316 North 26th Street, Billings, Montana; the Bureau's Austin Field Office, 300 E. 8th Street, Room 801, Austin, Texas, or Twin Buttes Field Office, 5973 Knickerbocker Road, San Angelo, Texas. All responsible sources responding to this synopsis shall submit information relating to business status, including identification as to whether small, large minority-owned, and/or woman-owned. For this acquisition, the small business standard is $17,000,000 and standard industrial code is 1629. (206)

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