Schedule of Prices - REVISED.pdf

This Schedule of Prices document is a bid submission form for the Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality for the Cal883432B Nutrient Reduction Wetland Project in Calhoun County, Iowa. The project encompasses selective clearing, excavation, grading, tile drainage installation, water control structure construction, erosion control matting placement, riprap installation, and restoration seeding across approximately 13,800 cubic yards of earthwork and 4 acres of seeding. Specific bid items include Site Stripping and Preparation (wetland and wasting areas), Crop Damage, various seeding activities (structure/waterway/channel, buffer, and temporary), Mobilization and Demobilization, Drain Tile Investigation, tile connection and capping, Excavation and Earthfill (general and wasting), Drainfill, Topsoil Placement, Tied Concrete Block Mat (2,750 square feet), Water Control Structure Assembly, Trench Drain, Corrugated Polyethylene Pipe in 12-inch and 10-inch diameters (581 linear feet and 148 linear feet respectively), Slotted 18-inch CMP Riser Structure, CMP Tile Outlets with Animal Guard in 15-inch and 12-inch diameters, Riprap and Erosion Stone (31 tons total), Straw Wattle (100 linear feet), and Silt Fences (1,325 linear feet). Bids are due August 26, 2026 at 3:00 PM through the Iowa Management of Procurement and Contracts System (IMPACS), with a pre-bid conference scheduled for August 12, 2026 at 10:00 AM at the Calhoun County Conservation office in Rockwell City, and construction completion required by November 30, 2026 with final seeding due December 15, 2026.

Bidders must submit unit prices and extended totals for each line item to calculate the Total Base Bid, with the estimated construction cost range of $135,000 to $155,000. Submission requires a proposal guarantee (bid bond) equal to 10 percent of the base bid and a notarized affidavit confirming no collusion or fraud. The successful bidder must furnish a performance bond equal to 100 percent of the contract price within 14 days of award and demonstrate ownership of at least 20 percent of their own equipment. Liquidated damages are assessed at $175 per day for general work and $125 per day for seeding activities. All work must comply with Calhoun County requirements and current Natural Resources Conservation Service construction specifications, with the water control structure requiring engineer-approved shop drawings prior to fabrication. Construction must commence within 7 days of a preconstruction conference scheduled within 7 days prior to the approved start date. Written questions must be directed to Spencer Pech at ISG Inc. (spencer.pech@isginc.com, 563-920-5758) with a copy to Tracy Blocker, received by 3:00 PM on August 19, 2026. All bids must be submitted electronically through IMPACS; paper submissions are not accepted.