Cal883432B 26-08 (Calhoun)

This solicitation calls for a single‑award construction contract to build a nutrient‑reduction wetland in Calhoun County, Iowa. The work includes extensive earthwork (≈ 13,800 cy), installation of tied‑concrete block mats, tile and outlet structures, rip‑rap, erosion control measures, and seeding of roughly 4 acres. Bidders must be registered with the Iowa Department of Inspections, Appeals & Licensing, provide a 10 % bid bond and a 100 % performance bond, and meet a tight schedule: sealed bids close 26 Aug 2026, construction must be finished by 30 Nov 2026, with buffer and structure seeding completed by 15 Dec 2026. The contract will be awarded through IMPACS, and the public bid opening will be broadcast via Microsoft Teams. • Estimated construction cost range: $135,000 – $155,000. • Mandatory bonds: 10 % bid bond; 100 % performance bond. • Key dates: pre‑bid conference 12 Aug 2026, bid deadline 26 Aug 2026, construction deadline 30 Nov 2026, final seeding 15 Dec 2026. • Contacts: Tracy Bruun ([email protected], (515) 344‑6279) and Tracy Blocker (same phone).