Ham892326B 26-03 (Hamilton)

The Iowa Department of Agriculture & Land Stewardship (IDALS) is seeking qualified contractors to design and construct a tile‑zone nutrient‑reduction wetland in Hamilton County. The scope includes extensive earthwork, installation of reinforced‑concrete and HDPE pipe, concrete structures, tied‑block mats, rip‑rap, and seeding of both structural and buffer areas. Bidders must be registered with the Iowa Department of Inspections, Appeals & Licensing and provide a 10 % bid bond and a 100 % performance bond. The project’s non‑seeding construction must be completed by 31 December 2026, with separate seeding deadlines extending into 2027. • Site stripping, excavation (~19,671 CY) and earth‑fill (~1,464 CY) • Installation of 2,645 LF of reinforced concrete pipe and 1,579 LF of HDPE dual‑wall pipe • Construction of concrete inlet/outlet structures, manholes, tied‑block mats (2,350 SF) and rip‑rap (33.3 TN) • Seeding of 0.4 AC (structure) and 21.1 AC (buffer) • Bid bond of 10 % and performance bond of 100 % required; liquidated damages apply for late performance