Cal883229BN & BS (Calhoun)

The Iowa Department of Agriculture & Land Stewardship, Division of Soil Conservation and Water Quality is soliciting sealed bids (Bid Number 26-02) for the construction of two nutrient reduction wetlands in Calhoun County through a Request for Bids (RFB) process. The procurement encompasses two concurrent projects: Cal883229BN (North), a pumped nutrient reduction wetland requiring approximately 31,200 cubic yards of earthwork and 16.6 acres of seeding, and Cal883229BS (South), a pumped nutrient reduction wetland requiring approximately 10,300 cubic yards of earthwork and 1.0 acre of seeding. Deliverables for both projects include excavation, grading, lift station installation with solar-powered pumps, water control structures, riprap placement, and seeding of associated infrastructure. Bidders must be registered with the Iowa Department of Inspections, Appeals & Licensing and submit a bid bond equal to ten percent (10%) of the bid amount, with the successful contractor required to furnish a Performance/Payment Bond equal to one hundred percent (100%) of the contract price. Sealed bids are due by 3:00 PM CDT on May 20, 2026, with a public bid opening scheduled the same day via IMPACS and Microsoft Teams. A non-mandatory pre-bid conference will be held on April 24, 2026 at 10:00 AM at the Calhoun County Conservation Board in Rockwell City, Iowa, and written questions regarding plans and specifications must be submitted to Project Engineer Dan Jensen at Shive-Hattery by 3:00 PM on May 5, 2026 to be included in a final addendum. Construction must commence within 14 days of the preconstruction meeting, with a construction deadline of December 31, 2026, a seeding deadline for structures by May 15, 2027, and a buffer seeding deadline of June 30, 2027.

No specific set-aside designations or disadvantaged enterprise restrictions are identified in this procurement. Non-Iowa corporations must provide proof of authorization from the Secretary of State to do business in Iowa prior to contract execution. No incumbent vendors or existing infrastructure integration requirements are noted in the solicitation documents. The estimated total construction cost range for the North project is $375,000 to $475,000, and for the South project is $175,000 to $275,000, with a combined potential award value between $550,000 and $750,000. Bidders must register with the Iowa Management of Procurement and Contracts System (IMPACS) to submit bids and can access contract documents through the Iowa Department of Agriculture website and the Department of Administrative Services bidding opportunities portal.