Description
The State of Iowa is seeking contractors to execute the CAL883432B Nutrient Reduction Wetland Project in Calhoun County. The scope includes selective clearing, excavation, grading, placement of tied‑concrete block mat, tile and outlet structures, riprap installation, construction of a water‑control structure, and seeding of approximately four acres. The work totals about 13,800 cubic yards of earthwork, 2,750 sq ft of concrete block mat, 769 linear ft of tile, and 31 tons of riprap. The project must be completed by November 30 2026 (construction) with buffer seeding by December 15 2026. Estimated construction cost is $135‑$155 k.
• Location: Calhoun County, Iowa
• Contract type: Invitation for Bid (public bid)
• Estimated value: $135,000‑$155,000
• Key activities: earthwork, concrete mat placement, tile/outlet installation, riprap, water‑control structure, seeding
• Timeline: Bid window 8/4/2026 – 8/26/2026; construction completed by 11/30/2026, seeding by 12/15/2026.