# Iowa City Community School District Bidopportunities #26-12 Emm1003114B (Emmett)

Emmet County nutrient-reduction wetland construction

**Posted:** October 15, 2026
**Respond By:** October 27, 2026
**Identifier:** 26-12 Emm1003114B (Emmett)
**NAICS:** 237990, 237110

Iowa is seeking unit-price bids to build a nutrient-reduction wetland in Emmet County, including earthwork, drainage, water-control structures, and native buffer seeding.
- **Government buyer:** Iowa Department of Agriculture and Land Stewardship (IDALS), Division of Soil Conservation and Water Quality, Water Resources Bureau. The project is associated with USDA’s Natural Resources Conservation Service (NRCS); Ducks Unlimited, Inc. prepared project specifications.
- **OEM and named companies:** **Wisconsin Flowgate** is identified as an acceptable water-control-structure supplier, or an approved equal. No other product manufacturers are named; Ducks Unlimited, Inc. is identified as a project/specification organization, not an OEM.
- **Main construction materials and structures:** 2,172 sq. ft. of steel sheet piling; 60 tons of sand drainfill; 104 linear feet of 6-inch perforated CPP toe drain; 151 linear feet of 12-inch HDPE dual-wall pipe; one aluminum water-control structure; 123 linear feet of 15-inch aluminum CMP drawdown pipe; one stoplog-storage structure; 40 linear feet of 8-inch CMP outlet and 20 linear feet of 15-inch CMP outlet; 672 tons of Iowa DOT Class E riprap; 118 cubic yards of concrete grout; one 36-inch aluminum CMP riser inlet; and 50 tons of macadam stone.
- **Earthwork and site services:** 979 cu. yd. of general excavation; 1,348 cu. yd. of general earthfill; 337 cu. yd. of general-dam earthfill; 826 cu. yd. of dam-core earthfill; and 2,483 cu. yd. of topsoil placement. Other bid items include stripping and clearing, drainage-tile investigation, mobilization/demobilization, crop-damage allowance, inspection and quality control, pollution control, and protective-cover seeding/mulching.
- **Seeding:** 0.5 acre of structure seeding and 16.8 acres of buffer seeding. Buffer seed must use an Iowa ecotype native mix with at least five native grasses and ten native forbs unless otherwise approved; seed mixes require engineer approval.
- **Notable specifications:** Sheet piling must meet project strength and material requirements; MSZ15-340 and MSZ15-350 are accepted alternate sections subject to the project requirements. Structures require shop drawings, and material certifications and construction quality inspections are required. Earthfill material and compaction must meet the specified requirements.
- **Estimated construction value:** $375,000–$475,000. Construction is scheduled to begin shortly after the preconstruction meeting, with separate completion deadlines for construction and seeding; no option years or subscription are specified.

### Description

The project is for construction of a Breakpoint nutrient reduction wetland in Emmet County, Iowa. Work includes selective clearing, excavation, grading, steel sheet pile and tile installation, water-control and stoplog storage structures, riprap with concrete grout, and seeding. The notice lists just under 6,000 cubic yards of earthwork and an estimated construction cost of $375,000–$475,000. Construction is to be completed by September 15, 2027, with seeding due by December 15, 2027 within the specified seeding windows.

[View original listing](https://bidopportunities.iowa.gov/Home/BidInfo?bidId=da4b8dc3-1c39-4765-9218-288a067cb537)