This competitive‑quotation (minor) public‑improvement contract calls for the design‑build installation of a water‑level‑control system at Perkins Marsh, Palo Alto County, Iowa. The contractor must provide all labor, equipment, materials and supervision to complete excavation of an inlet channel, placement of a precast concrete intake structure, installation of approximately 1,400 linear feet of 12‑inch drainage tile, granular bedding, back‑fill, and associated site‑cleanup. The work must be performed in accordance with DNR specifications, obtain required storm‑water permits, and adhere to a completion deadline of December 4 2026. No bid bond is required; a performance bond is required only if the contract value exceeds $25,000. • Scope: excavation (≈232 CY), concrete structure installation, tile placement (≈1,400 LF), bedding, back‑fill, private‑tile repair, and site restoration. • Location: Perkins Marsh, NW ¼ Section 29, Township 97 N, Range 33 W, Palo Alto County, IA. • Contract type: unit‑price competitive quotation (minor). • Submission: electronic proposals due 9/10/2026 3:00 PM via
[email protected]. • Mandatory performance bond if contract > $25 k; liquidated damages $500 per day for late completion. • Required permits: NPDES storm‑water construction permit.