SL District, Jefferson County, new concrete pavement, grading, asphalt pavement on interchange ramps, signage, and striping

The Jefferson County Department of Public Works is seeking a qualified contractor to construct a roundabout at the Highway 61 / I‑55 (Exit 170) intersection. The scope includes demolition, new concrete pavement, grading, asphalt pavement on interchange ramps, installation of signage, and striping, all in compliance with 2025 MoDOT specifications. The contract is a sealed‑bid competitive procurement with a mandatory pre‑bid meeting and a strict 5 % bid‑bond requirement. No second‑tier subcontracting is allowed, and the contractor must be on MoDOT’s Qualified Contractor List and provide OSHA‑10 safety training within 60 days of construction start. The project must be completed within 130 working days after commencement.