Stone Entry Portal, Lake Darling State Park, Washington County

The Iowa Department of Natural Resources is soliciting bids for the replacement of the existing entrance portal at Lake Darling State Park in Washington County, Iowa, with a standardized stone entry portal as per the Iowa DNR Design Guide. The scope of work includes demolition of the current structure, earthen grading, construction of concrete footings and structural concrete, installation of stone work, a timber sign support with steel brackets, electrical and lighting systems, and comprehensive site restoration involving fertilization, seeding with a Type 1 permanent lawn mixture, and hydraulic application of wood cellulose fiber mulch. The project is structured on a unit price basis with five lump sum line items covering mobilization, demolition, the stone portal and associated items, electrical and lighting, and site restoration. The contract requires compliance with the Iowa Department of Transportation’s Standard Specification for Highway and Bridge Construction – Series 2015 for concrete, mandating a minimum compressive strength of 3,500 psi at 27 days, and adherence to Section 9010 of the Iowa SUDAS Specifications for grading and seeding. All work must be completed by December 11, 2026, and must be performed in accordance with the submitted drawings and supplemental provisions. Bids must be submitted electronically by 3:00 PM on August 27, 2026, to [email hidden], with no paper submissions permitted, and must include a fully completed Proposal Form (Attachment A), all required certifications, and the contractor’s Iowa Contractor Registration Number. The award will go to the lowest responsive and responsible bidder. A performance bond is required if the contract price equals or exceeds $25,000, with the bond amount not less than 100% of the contract value. Contractors must carry public liability insurance with minimum coverage of $250,000 per person and $500,000 per occurrence, and must obtain a NPDES Stormwater Discharge Permit (DNR General Permit No. 2) before commencing any land-disturbing activity. Contractors are also required to call Iowa One Call (811) prior to excavation. Liquidated damages of $1,000 per day will be assessed for each day of delay beyond the completion date, and a one-year warranty from the date of final acceptance is mandated, during which the contractor must promptly repair or replace any defective work or materials at no cost to the state. All contract records