Septic Mound System, Wapsipinicon State Park, Jones County

The Iowa Department of Natural Resources is requesting bids for demolition of an existing septic system and installation of a new septic mound system at Wapsipinicon State Park in Jones County, with bids due August 27, 2026 at 3:00 PM. Site visits are strongly encouraged prior to bidding.

The scope encompasses five bid items: mobilization on a lump-sum basis; demolition and abandonment of the existing septic tank and leach field per Iowa Code Chapter 69; installation of a complete septic mound system including a 2,000-gallon septic tank, 1,000-gallon dosing chamber with pump, 290 feet of 2-inch force main, seven distribution trenches (2 feet wide by 75 feet long, spaced 4 feet apart), electrical service line, and mound system per plan specifications; topsoil import at an estimated 40 cubic yards on a unit-price basis; and site restoration including finish grading, hydroseeding, and cable fence adjustment. The mound system measures 156 feet by 32 feet and requires 100-foot separation from a private irrigation well. Two adjacent golf course holes will temporarily close during construction. All work must comply with Iowa Code Chapter 69 and NPDES Stormwater Discharge Permit requirements.

Project completion is required by October 30, 2026; liquidated damages are assessed at $1,000 per calendar day for delays. A performance bond equal to 100 percent of the contract price is required if the contract price equals or exceeds $25,000, along with liability and property damage insurance minimum coverage of $250,000 per person and $500,000 each occurrence. Payment will be made on a unit-price basis for topsoil and lump-sum for other items upon completion and acceptance; the Department reserves the right to withhold up to three percent of payment amounts pending the statutory claims period. Contractor proposals must remain valid for 45 days from the proposal deadline. Bids must be submitted electronically to constructionbids@dnr.iowa.gov.