The Tennessee Department of Transportation has awarded the contract for the I-75/I-24 interchange modification design-build project.

The low bid of $132,644,398.00 was submitted by C.W. Matthews Contracting Co., Inc. The project area is along the I-75 and I-24 corridors and extends from Spring Creek Road over I-24 to approximately one mile west of the I-75 interchange to East Brainerd Road a total of 2.7 miles.

The project will also include new bridges for Spring Creek Road over I-24, as well as interstate bridges. Retaining walls will be required along interstate ramps and between I-75 and the Welcome Center area.

The winning design-build proposal will complete the design and construction of this project in less than three years, according to TDOT.

“By using the design-build contracting method for this complex project, we were able to explore every available option to deliver it in the most timely and cost-efficient way,” Assistant Chief Engineer/Region 2 Director Joe Deering said. “The process resulted in several innovative concepts, and the winning proposal will save two years of expected construction time.”

TDOT explained the "design-build" as a project delivery method that combines all or some portions of the design and construction phases of a project into a single contract. The concept has been used on some of its larger projects to expedite project delivery and streamline design processes.

Over the next several months, the contractor will complete the design of the project and acquire necessary permits.

Then, in the spring of 2019, geotechnical improvements to the project area will get underway, with construction expected to begin in the late fall of 2019.

Once construction begins, TDOTD says every effort will be made to minimize impacts to drivers.

The I-75/I-24 interchange modification project was one of 962 critical transportation projects included in the 2017 IMPROVE Act legislation.