Har892022C 26-09 (Hardin)

This solicitation seeks a qualified contractor to construct a tile‑zone nutrient‑reduction wetland in Hardin County, Iowa. The work includes extensive earthmoving, drainage‑tile investigation and removal, installation of reinforced concrete pipe and high‑density polyethylene (HDPE) dual‑wall pipe, construction of a concrete water‑control structure and stop‑log storage structure, rip‑rap placement, top‑soil handling, and two seeding phases (buffer and structure) covering roughly 6.8 acres. The contract is a sealed‑bid (RFB) with a 10 % bid bond requirement and a 100 % performance bond requirement. Completion of all non‑seeding work is required by 15 June 2027, with buffer‑seeding by 30 June 2027 and structure‑seeding by 15 September 2027. The estimated construction cost is between $200,000 and $300,000. • Scope: site clearing, drain‑tile removal (~2,800 LF), ~17,100 CY earthwork, 79 LF of 36‑in. reinforced concrete pipe, ~3,300 LF of HDPE pipe (4‑12 in.), concrete water‑control structure, stop‑log storage, rip‑rap (245 TON), topsoil placement (5,591 CY), and seeding (≈ 6.8 AC). • Procurement: RFB – sealed bid; bid bond 10 % of bid, performance bond 100 % of award, required registration with Iowa Department of Inspections, Appeals & Licensing. • Schedule: Pre‑bid conference 13 Aug 2026 (optional), questions due 20 Aug 2026, bid submission 26 Aug 2026, construction start within 7 days of pre‑construction conference, final non‑seeding completion 15 Jun 2027, seeding deadlines 30 Jun 2027 (buffer) and 15 Sep 2027 (structure).