Site work for a civil project in Carroll, Iowa. Completed plans call for site work for a road / highway; and water / sewer project.

This project is for a traditional breakpoint nutrient reduction wetland. In general, the work involves, but is not limited to, selective clearing, excavation, earthfill, steel sheet pile weir construction, water control structures and seeding. This project includes around 17,500 cubic yards of earthwork, 2,595 square feet of steel sheet pile, water control structure and inlet riser, 136 feet of 15-inch diameter CMP, 812 tons of riprap, 98 cubic yards of concrete grout, 12.7 acres of seeding and 2,175 feet of 9-inch diameter straw wattle Bids must be submitted on the appropriate bid forms provided and shall include a bid bond in the amount of ten percent (10%). Bidders must also be registered with the Iowa Division of Labor. The successful bidder shall be required to furnish a Performance/Payment Bond in an amount equal to one hundred percent (100%) of the contract price. Q/A :- Questions concerning the Plans and Construction Specifications should be in writing and addressed to Juan Arellanes, P.E., jarellanes@jeo.com, and must copy Tracy Bruun, Division, tracy.bruun@iowaagriculture.gov. All other questions concerning other Contract Documents should be addressed to Tracy Bruun, Division, tracy.bruun@iowaagriculture.gov or 515-344-6279. To be considered in a final addendum, written questions must be received by 3:00 PM on September 30, 2025. The estimated construction cost range for this project is $350,000 to $400,000. *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document. The purpose of this project is to construct a traditional breakpoint nutrient reduction wetland located several miles East of Lanesboro in Carroll County, Iowa. The construction of this dam will result in the establishment of a water quality wetland that treats water prior to entrance to Purgatory Creek. Target criteria and design guidelines used for the wetland establishment are in accordance with Iowa NRCS Construction Practice Standard Pond (CPS 378), Grade Stabilization Structure (CPS410), and Constructed Wetland (CPS 656). Pond is accomplished by the following: o Storing water for erosion control and flow detention. o Improving water quality. Grade Stabilization Structure is accomplished by the following. o Reducing erosion. o Improving water quality. Constructed Wetland is accomplished by the following: o Improving water quality of storm water runoff, tile drainage outflow and other waterflows. The intent is to collect water from the watershed in a nutrient reduction wetland with the purpose of improving water quality. The wetland (located in the E 1/2 of the NE1/4 Section 13, T85, R33W) will include construction of an earth dam. A steel sheet pile outlet will serve to control the depth of the normal pool within the resulting wetland and discharge downstream to Purgatory Creek to the West. A water control structure/CMP drawdown structure with a filter diaphragm is proposed to allow draining of the wetland for maintenance. A wave bench and stilling basin are to be constructed on the earth dam. The proposed pool fill borrow is intended to expand the normal pool area and decrease the overall depth of the wetland. All Work Except Seeding November 15, 2026 $175.00 Per Day ; Seeding December 15, 2026 $125.00 Per Day