Iowa City Community School District Bidopportunities #26-13 Wor982210D (Worth)

Construction of East and West nutrient-reduction wetlands with solar pumping systems

Iowa is seeking a construction contractor for two nutrient-reduction wetlands in Worth County, including solar-powered pumping, drainage infrastructure, earthwork, and seeding. - Government buyer: Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality; the project is in Worth County, Iowa. - Procurement: Build the East and West wetland systems together for the Wor982210D Nutrient Reduction Wetland Project, Bid No. 26-13. The estimated construction value is $225,000–$325,000. - Major quantities: Approximately 7,500 cubic yards of earthwork, 700 linear feet of pipe, 129 tons of riprap, three solar pump systems, two SW-512 intake structures, three modified SW-513 outlet structures, two modified SW-401/SW-402 pump basins, and approximately 2.5 acres of seeding. The price schedule provides site- and item-specific quantities, including some zero-quantity entries. - Solar pump requirements: One 3 HP turbine system and two 1.5 HP axial systems are listed in the price schedule. Specifications identify Carry pumps, Enfusion Blender solar VFDs, Sun Rac panel mounting hardware, and eight 400 W solar panels per system. The turbine alternative must deliver 295 gallons per minute at 15 feet of total dynamic head; alternatives for either configuration must meet the applicable plan capacity and solar-power requirements. - Other named companies/products: Dura Trac Nursery Floor is cited as an example of an approved expanded-metal grate. Chosen Valley Testing, Inc. prepared the geotechnical report for Bolton & Menk, Inc.; these firms are mentioned as report consultants, not as required construction vendors. - Notable construction requirements: Make tile and pipe connections watertight; reconnect encountered field tiles unless plans specify otherwise; use suitable cohesive fill (sand and gravel are prohibited); meet specified compaction and erosion-control requirements; and obtain approval of the native buffer seed mix before application. Geotechnical analyses found safety factors above the stated minimum but noted erosion and shallow-failure risks on exposed slopes. - Schedule: Construction is to begin shortly after the preconstruction meeting. Main construction is due in the 2027 construction season, with buffer and structure seeding completed within their applicable seeding periods later that year.

Description

The project involves constructing East and West wetland systems in Worth County, Iowa, which will be awarded together to the lowest bidder. Work includes selective clearing, excavation and grading, tile and outlet structures, installation of pumps and tile, riprap placement, and seeding. The stated project quantities include approximately 7,500 cubic yards of earthwork, 700 linear feet of pipe, 129 tons of riprap, three solar pump systems, and 2.5 acres of seeding. The estimated construction cost is $225,000–$325,000, with construction completion due September 1, 2027 and seeding completion due December 15, 2027.

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