# Iowa City Community School District Bidopportunities #26-16 Buc880725C (Buchanan)

Buchanan County Nutrient Reduction Wetland Construction

**Posted:** October 17, 2026
**Respond By:** November 12, 2026
**Identifier:** 26-16 Buc880725C (Buchanan)
**NAICS:** 237990, 237110

The Iowa Department of Agriculture and Land Stewardship is seeking bids for construction of the Buc880725C Nutrient Reduction Wetland Project in Buchanan County, Iowa.
- **Government buyer:** Iowa Department of Agriculture and Land Stewardship, Division of Soil Conservation and Water Quality; plans and specifications were prepared by USDA Natural Resources Conservation Service (NRCS), Iowa. Buchanan County is also identified in the bid book.
- **Project scope:** Site clearing and preparation, drainage tile investigation and removal, excavation and earthfill, pipe and water-control structure installation, erosion protection, and seeding.
- **Key estimated quantities:** About 22,900 cubic yards of earthwork, 2,500 square feet of tied concrete block mat, 1,270 linear feet of tile, 30.5 tons of erosion stone, and 6 acres of seeding. The schedule further breaks out work items and quantities below.
- **Named OEM:** **Motz Enterprises, Inc.** is specified as the manufacturer of Flexamat Plus tied concrete block mats. No other manufacturers, vendors, or product part numbers are named.
- **Notable requirements:** Geotextile is required beneath block mats at seams; erosion stone must meet specified Iowa DOT gradation requirements. Structure and channel seeding uses specified grass, fertilizer, and mulch requirements; buffer seeding requires a native mix with at least five native grasses and ten native forbs, with the mix submitted for approval before application. Construction and seeding must meet the respective specification deadlines and seeding windows.
- **Estimated construction value:** $180,000–$200,000.

### Description

The project is for construction of a nutrient reduction wetland in Buchanan County, Iowa. Work includes selective clearing, excavation, grading, tied concrete block mat installation, tile installation, a water control structure, riprap, and seeding. The work includes approximately 22,900 cubic yards of earthwork, 2,500 square feet of tied concrete block mat, 1,270 linear feet of tile installation, 30.5 tons of erosion stone, and 6 acres of seeding. The estimated construction cost is $180,000–$200,000, with construction due by November 15, 2027 and seeding due by December 15, 2027.

[View original listing](https://bidopportunities.iowa.gov/Home/BidInfo?bidId=90e30274-e7ee-477e-aae9-6272bd9f7839)