Perkins Marsh Tile Outlet, Prairie Lakes Wildlife Unit, Palo Alto County

The Iowa Department of Natural Resources is soliciting competitive bids for construction of an intake structure, channel inlet, and tile outlet system on Perkins Marsh in Palo Alto County, Iowa, with bids due September 10, 2026 at 3:00 p.m. A preference is given to products grown and coal produced within Iowa.

The scope includes excavation of an inlet channel (232 cubic yards of Class 10 material), installation of a pre-cast concrete intake structure on Class 1 bedding, 1,410 linear feet of 12-inch dual-wall non-perforated high-density polyethylene field tile meeting SUDAS Section 4020 specifications, 450 tons of granular bedding and backfill, private tile repair and reconnection (10 locations), 10 linear feet of 15-inch corrugated metal pipe at the outlet, tile search and exposure (100 linear feet), and installation of 12-inch heavy-duty bar guards and 15-inch rodent guards. All work must conform to the current Iowa SUDAS Specifications Manual and applicable codes. Contractors must obtain a NPDES Stormwater Discharge Permit (DNR General Permit No. 2) prior to commencing land-disturbing activities affecting one or more acres. Site visit is mandatory prior to bidding; no pre-bid conference is scheduled.

Contract completion is December 4, 2026. Work on portions crossing private lands cannot commence until crop harvest is completed. Payment is due within 30 days of approved invoice submission on a unit-price basis. A performance bond equal to 100% of contract price is required if total cost exceeds $25,000; no bid bond is required. Liquidated damages are $500 per calendar day for completion delays. Minimum insurance requirements include $250,000 per person and $250,000 each occurrence for public liability, and $500,000 each occurrence for property damage. Contractors must hold an Iowa Contractor Registration Number and provide subcontractor names and registration numbers prior to site work.

Electronic proposals must be submitted to constructionbids@dnr.iowa.gov with the subject line containing the project name, contract number 26-01-74-01, and bid letting date.