Replace Roof on Onawa Maintenance Garage

The Iowa DOT seeks competitive sealed bids to replace the roof membrane on the Onawa Maintenance Garage located at 1800 Hwy 175 W, Onawa, IA. The base scope requires demolition of existing roofing materials, flashing, gutters, downspouts, and insulation, followed by installation of new roofing membrane per the project manual. An optional alternate scope (subject to DOT discretion) adds removal and replacement of EPDM membrane on a two‑story section, including additional insulation work. The contract will be awarded to the most advantageous bidder based on cost and other evaluation factors; the award will be based solely on the base bid. Payments are made monthly up to 97 % of work performed, and the DOT will supervise the work with periodic inspections.