26-06 Cer962218C (Cerro Gordo)

The Iowa Department of Agriculture and Land Stewardship is seeking bids for the construction of a Tile Zone nutrient reduction wetland in Cerro Gordo County. The project involves selective clearing, excavation, grading, installation of inlet and outlet concrete structures, tile installation, and seeding. The estimated construction cost range for this project is $350,000 to $400,000. The project includes around 33,356 cubic yards of earthwork, one inlet and one outlet concrete structures, two concrete manholes, 3,762 linear feet of tile installation, 22 tons of riprap, 1,202 square yards of turf reinforcement mat, and 10.2 acres of seeding. Key features of the project include: • Site preparation and stripping • Pollution control measures • Seeding and mulching for protective cover • Mobilization and demobilization • Subsurface drain investigation, removal, and repair • Removal of water • Excavation • Earthfill • Topsoil • Concrete • Tile drains for land drainage • Loose rock riprap • Geotextile The project is expected to be completed by June 15, 2027, with buffer seeding to be completed by June 30, 2027, and structural seeding to be completed by September 15, 2027.