Marion/Grundy Co. I-24 Interchange at SR-15 (Exit 134)

Review Date: August 25, 2025

Deadline to Submit Letter of Interest: August 1, 2025

Letter of Interest - Marion/Grundy Co. 133134.00 - Constructability Review

Note: Participation in this review is voluntary, non-compensable, and will not prevent you from submitting a bid for the project.  Anything you choose to share will remain in confidence.  Any Contractor that is prequalified with TDOT's Construction Division may request participation by completing and submitting a Letter of Interest to Jonathan Vest at Jonathan.Vest@tn.gov.

Project Description

Reconstructing SR-15 through the I-24 interchange, including bridge replacement and ramp reconstruction.

Scope

Proposed improvements include the following to improve operations, safety, and modernization of the interchange:  

• Remove the two SR-15 bridges and replace with a single 3-span concrete bridge with walled abutments;
• Remove the railroad bridge;
• Reconfigure 3,200-ft of SR-15 to a 3-lane curbed roadway, with bicycle and pedestrian facilities including extension        of the Mountain Goat Trail between Indigo Lane and SR-2 (US-41);
• Reconstruct the ramps between I-24 and the roundabouts;
• Replace interchange lighting with high mast and offset.
  
  

Challenges

The project location and existing interchange configuration are contributing factors in anticipated challenges. The interchange is a partial cloverleaf with all ramps being on the east side, such that overhead bridge work that cannot be completed above live traffic is not easily detoured.

• All work overhead of I-24 without a viable detour;
• Phased demolition of existing bridges, including crane placement;
• Constructing and maintaining traffic through the proposed roundabouts;
• Utility relocation along and under I-24.

Additional Resources

**Click here for Project Information for Constructability Review**

TDOT Project Manager: Michael O’Donnell, PE
Michael.ODonnell@tn.gov
(423) 634-8622