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

Y -- TWIN BUTTES DAM MODIFICATION, SAN ANGELO, TEXAS SOL 1425-5-SI-60-07610. DUE 110995. 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 two-step competitive, firm-fixed price requirement. ``Step One'' requires offerors to submit a technical proposal for evaluation by Bureau of Reclamation personnel for the determination of qualified bidders. ``Step Two'' requires selected offerors to submit a cost proposal within 14 days after they are notified by the Contracting Officer. A Technical Proposal Evaluation Committee will evaluate the technical proposals according to the following criteria: (a) General. - Technical proposals will be evaluated in four major categories that are considered to be of importance to the Government in determining the most appropriate method for completing the required work. These categories are as follows: (1) Experience; (2) Technical plan for construction; (3) Construction management/scheduling; (4) Safety; (b) For all categories, the clarity of the proposal will be a key in the evaluations. Importance will be placed on proposals that clearly define the work to be done and to proposals that describe the concepts behind the offeror's plan. For category (1) and (2), the appropriateness of the proposed methods and equipment will be important. Importance will be placed on realistic assumptions of equipment performance; to proposals which are flexible enough to cover a range of conditions; to proposals which provide adequate equipment and contingency equipment should primary equipment prove to be ineffective or in the event of breakdown; and to proposals which fully eliminate the risk of not completing the construction work on schedule. Specific major criteria and factors to be considered in evaluating technical proposals are outlined below. The criteria and factors to be considered in evaluating technical proposals are given as follows: (1) Experience - (i) Key jobsite personnel; Qualifications of the individuals who will occupy the following key jobsite positions on this project will be evaluated on the basis of technical experience, managerial experience, and education. (A) Project Manager (B) Project Engineer (C) Project Superintendents (including Slurry Trench Specialist (ii) Corporate experience - Offerors shall have satisfactorily completed or undertaken with satisfactory progress, within the past 5 years, at least three major projects for the construction of a cutoff wall. The offeror shall submit evidence of demonstrated competence in slurry trench excavations with similar hard foundation (highly cemented alluvium or conglomerate) and rock excavation conditions which includes at least one major project for the construction of a cutoff wall over 100 feet deep. The projects should be for construction of a cutoff wall involving similar slurry trench construction methods and with similar significant difficulty or unique excavation methods and comparable in scope to that described in the specifications. In the event offerors submit proposals as a joint venture, the sponsor of the joint venture, or a partner company of the joint venture, shall meet this minimum requirement. Proposals received from offerors that do not meet this minimum requirement will not be evaluated or considered for possible award of the contract. The coprorate experience of firms meeting the minimum requirement outlines above will be evaluated. (2) Technical plan for construction; (i) Primary and contingency equipment and availability of equipment; (ii) Trench excavation methods and procedures, including slurry operation, trench support, and trench quality; (iii) Trench backfilling methods and procedures; (3) Construction Management/Scheduling-(i) Realistic practicality, clarity of, and completeness of the proposed construction schedule in sufficient detail to allow a clear understanding of the construction activities and sequences; (ii) Capability and adequacy of proposed provisions for quality inspection and testing; (iii) The adequacy of the offeror's approach to subcontracting and control of subcontracting activities; (iv) Completeness and realism of the proposed plan for dealing with scheduling difficulties with proposed procedures and methods for reducing the impacts of the identified difficulties; (v) The adequacy of the offeror's proposed method on developing, maintaining, and using the construction schedule; (vi) The adequacy of the offeror's methods and resources for the timely preparation of reports and submittals; (vii) The adequacy of the offeror's proposed approach to scheduling materials and supplies; (4) Safety - Safety management will be evaluated in terms of the following: (i) Adequacy and completeness of the project safety program; (ii) Workmen's compensation experience modification rate (EMR). Solicitation packages will be available approximately July 17, 1995. Receipt of technical packages (Step One) are tentatively scheduled for 4:00 p.m., August 28, 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. (170)

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