Missouri's $583M I-70 Expansion Picks Contractor

Heavy civil and bridge firms in central Missouri should watch for subcontracting openings on the 44-mile stretch.

Updated on Nov. 5, 2026 in Construction

Isometric editorial illustration of a concrete barrier section and a steel I-beam in a flat grassy cut under open sky, evoking highway construction work. — Missouri's Highways and Transportation Commission selected the Millstone Weber Team to build a $583 million, 44-mile I-70 expansion from Kingdom City to Warrenton. AI Illustration. Upload story photo >

Live Poll

Do you support spending $583 million to widen I-70 in central Missouri?

The Missouri Highways and Transportation Commission has selected the Millstone Weber Team as contractor for the Kingdom City to Warrenton section of the Improve I-70 project. The $583 million segment covers 44 miles and adds a third lane in each direction, which matters for construction firms bidding on or subcontracting to state highway work.

Why it matters

The award moves a large, multi-year highway package from planning into delivery, shaping demand for earthwork, paving, bridge, and traffic-control trades across central Missouri. For operators, a single prime contractor on a project this size typically means subcontracting opportunities for local firms, which makes the contractor's supplier and subcontractor pipeline worth tracking.

The Kingdom City to Warrenton section carries a $583 million price tag across 44 miles, with three bridge replacements and six bridge rehabilitations. The overall Improve I-70 corridor stretches nearly 200 miles from Blue Springs to Wentzville, so this segment is a significant share of the broader program.

The players

Missouri Highways and Transportation Commission

The state body that oversees Missouri's highway program, setting project awards and directing major state road investments.

Millstone Weber Team

The contractor selected to deliver the Kingdom City to Warrenton section of the Improve I-70 project.

The details

The project adds a third lane in each direction along the 44-mile stretch, a capacity expansion that requires substantial grading, paving, and drainage work. It also includes three bridge replacements and six bridge rehabilitations, and a fourth lane on eastbound I-70 at Mineola Hill. The Missouri Highways and Transportation Commission made the selection, and the contractor will carry the delivery responsibility for the section.

The contractor selection for the Kingdom City to Warrenton section was announced on November 5, 2026.

Market Landscape

The Improve I-70 program is a long-running statewide corridor effort, and each section award follows the same pattern of a commission-selected prime contractor managing a large bridge and lane-expansion package. Contractor selections like this one set the subcontracting and labor demand that regional construction firms will compete for over the life of the work.

Construction firms in central Missouri should watch for prime-contractor subcontracting opportunities on the Kingdom City to Warrenton section, particularly in paving, bridge work, and traffic control. Firms without a current bid strategy for state highway work may want to review their prequalification status with the state, a matter to confirm with a qualified advisor.

The takeaway

Operators in heavy civil and bridge work should track the Millstone Weber Team's subcontracting announcements for the Kingdom City to Warrenton section, since prime awards of this size typically open local subcontract packages. Keep an eye on the state's project schedule for when those trade packages will be let.