Description
This Iowa Department of Agriculture and Land Stewardship bid calls for the design‑build of a nutrient‑reduction wetland in Buchanan County. The contractor will perform selective clearing, excavation, grading, installation of tied concrete block mats, tile drainage, a water‑control structure, riprap, and seeding of six acres. The scope includes roughly 22,900 cubic yards of earthwork, 2,500 sf of concrete block mat, 1,270 lf of tile, 30.5 tons of erosion stone, and associated site‑preparation activities. Estimated construction cost is $180,000‑$200,000, with completion of construction required by 15 Nov 2027 and final seeding by 15 Dec 2027.