Bridge Improvement (B485)

This contract calls for the full replacement of Bridge B485 on 151st Street West over the Ninnescah River in Sedgwick County, Kansas. The scope includes a six‑span, 110‑ft prestressed‑concrete‑beam bridge, temporary construction access crossings, grading, bituminous surfacing, signing, pavement marking, seeding, and guardrail installation. The work is funded through the county’s Public Works budget, with a competitive sealed‑bid process that required a 5 % bid bond. The lowest responsive bid was submitted by Dondlinger & Sons Construction Co., Inc. for $4.48 million, and the project must be completed no later than July 1 2026. • Core deliverables: new prestressed‑concrete bridge, approach slab, riprap slope protection, guardrails, and related site work. • Mandatory compliance: bid bond ≥ 5 % of proposal, acknowledgment of three addenda, and adherence to Kansas Division of Water Resources and U.S. Army Corps of Engineers permits. • Timeline: bid opening 11 Apr 2023, award 19 Apr 2023, construction deadline 1 Jul 2026.