26-11 Cla953734C (Clay) RFB

The Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality, is requesting bids for construction of a traditional breakpoint nutrient reduction wetland in Clay County, with bids due October 27, 2026 at 3:00 p.m. via the Iowa Management of Procurement and Contracts System (IMPACS), and a pre-bid meeting scheduled for October 7, 2026 at 10:30 a.m. at Bolton & Menk Office in Spencer (with virtual attendance available).

The scope encompasses selective clearing, excavation, grading, steel sheet pile installation, tile installation, water control structures, riprap placement, concrete grout work, and seeding across approximately 15.2 acres. Specific quantities include approximately 15,204 cubic yards of earthwork, 2,523 square feet of steel sheet piling, 540 linear feet of HDPE tile, 957 linear feet of reinforced concrete pipe (12-inch and 30-inch diameter), 303 tons of riprap, 46 cubic yards of concrete grout, and 15.2 acres of seeding. The design incorporates NRCS Conservation Practice Standards 656 (Constructed Wetland) and Job Class IV standards. Construction must commence within 7 days of the preconstruction conference and be completed by November 15, 2027, with seeding completion by December 15, 2027. Liquidated damages are assessed at $175 per day for construction delays and $125 per day for seeding delays.

The estimated construction cost range is $450,000 to $550,000. Bidders must submit a bid bond equal to 10 percent of the bid amount and be registered with the Iowa Department of Inspections, Appeals & Licensing. The successful bidder must furnish a Performance/Payment Bond equal to 100 percent of the contract price within 14 days of award. Written questions regarding plans and specifications are due October 14, 2026 at 3:00 p.m. to be included in a final addendum. All bidders must submit a notarized affidavit confirming examination of contract documents and absence of collusion; failure to submit will result in bid rejection.