Coverall salt storage building in Bison DOT Maintenance Yard

The contract entails the demolition of an existing fabric-covered salt storage building and the construction of a new 63' x 60' pre-engineered structure at the Bison DOT Maintenance Yard in South Dakota, with the work to be completed by October 1, 2026. The new building must feature a hot-dipped galvanized steel frame with a minimum zinc coating of 2.2 oz/ft² compliant with ASTM A123, and a 12 oz/yd² HDPE fabric cover with LDPE coating sourced exclusively from approved suppliers including Fabrene, Intertape, and Engineered Coated Products. The structure must be engineered to withstand a 40 psf snow load and 115 mph wind load in accordance with IBC 2021, and all engineering plans must be sealed by a South Dakota-licensed professional engineer. The contractor is responsible for verifying field conditions and retaining the existing 8' concrete retaining wall, with no new electrical systems permitted. A 15-year pro-rated warranty covers both the fabric and coating, with specific requirements for anchor bolt installation, fabrication deviations, and maintenance documentation to ensure warranty compliance. Bids must be submitted as a single sealed envelope containing the DOT-123 contract proposal form, a notarized contractor’s affidavit, and optionally a Fuel Adjustment Affidavit, with all submissions required to be physically delivered to the Belle Fourche Area Office by 1:00 p.m. MT on May 7, 2026; electronic, faxed, or emailed proposals are not accepted. The contract is structured as a firm fixed price with a bid range of $99,602 to $161,280, reflecting competitive submissions, though no formal CLIN-level pricing is provided. The contractor must comply with extensive state and federal requirements, including Title VI non-discrimination, ADA, Section 504, Clean Air Act, and Federal Water Pollution Control Act mandates, with full flow-down obligations to subcontracts. Laborers and mechanics must be paid wages in line with applicable determinations, supported by detailed payroll records subject to inspection. A certification under South Dakota Constitution Article 3, Section 12 prohibits any interest by state legislators in the contract, with immediate reporting required for any change. The fuel adjustment program allows for cost reconciliation up to 15% of the contract amount if elected, and all deviation requests must be submitted and approved in writing prior to bidding, with