Construction Specifications.js
JS file 148 KB Posted
- Attached to
- Mah751636C 25-15
- Solicitation number
- 009_RFB_WRBWL_CY25-15
- Issued by
- Lyon County, Iowa
About this file
This is a Construction Specifications document and bid solicitation issued by the Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality, for the Mah751636C Nutrient Reduction Wetland Project in Mahaska County, Iowa. The project encompasses construction of a traditional breakpoint nutrient reduction wetland involving selective clearing, excavation, grading, riser outlet installation, tile and outlet structures, ripric placement, and seeding across approximately 6.6 acres. The scope includes approximately 24,926 cubic yards of earthwork, 368 linear feet of tile installation, concrete and nyloplast structures, 310 tons of riprap, and 25 cubic yards of grout. A pre-bid conference is scheduled for October 7, 2025, at the Oskaloosa Library, with bid submissions due October 28, 2025, at 3:00 PM via the IMPACS online bidding system. Construction work (excluding seeding) must be completed by November 15, 2026, with seeding completion by December 15, 2026. The successful bidder will execute a 100% performance bond within 14 days of receiving the Notice-of-Award, with the bond remaining in effect for one year following final acceptance.
The estimated construction cost ranges from $250,000 to $350,000, with liquidated damages of $175 per day for delays in main work and $125 per day for seeding delays. Contractors must be registered with the Iowa Department of Inspections, Appeals & Licensing and submit a 10% bid bond. Non-Iowa corporations must provide proof of authorization to do business in Iowa prior to contract execution. Contractors must demonstrate financial capability, previous project experience, equipment ownership, and performance records. Materials purchased for the project are exempt from sales and use taxes, with contractors receiving a specific sales tax exemption certificate. The project features a comprehensive nutrient reduction strategy with a total drainage area of 181 acres and a wetland pool area of 1.99 acres, including a water control structure, principal spillway, drawdown structure, and drainage tile modifications.
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