David Hoekel Parkway at I-70 complete

Improving Connectivity With a Tight Diamond Interchange

David Hoekel Parkway Interchange at I-70

City of Wentzville, MO

For decades, Wentzville, MO, has sought improvements to David Hoekel Parkway as a means to facilitate growth not only in the city, but throughout the entire county. That vision came one step closer to reality with the completion of a new interchange at I-70.

CMT led the design of a tight diamond interchange to enhance connectivity and alleviate congestion along the critical thoroughfare. The project included two bridges carrying David Hoekel Parkway over I-70 and the Norfolk Southern Railroad, large mechanically stabilized earth (MSE) walls supporting bridge end fills, and outer road relocations.

Extensive railroad coordination was essential for the success of the project. CMT’s design, including the innovative interchange type and alignment changes, reduced the cost of the interchange by $5.9 million, a 20% savings over the concept originally considered. A successful cost share application with the Missouri Department of Transportation (MoDOT) helped the city secure the remaining funding to complete the project.

Project Contact(s)

Brian Eads, PE, PTOE

Project Award(s)

  • American Public Works Association - Missouri Chapter, Project of the Year Award 2022

Project Service(s)

  • Environmental Services
  • Funding Assistance
  • Grant Application Preparation
  • Interchange Justification
  • Lighting Design
  • Multi-Use Pedestrian Facility Design
  • Overhead Sign Structure Design
  • Practical Design
  • Permitting, Regulatory Coordination and Compliance
  • Public Outreach and Education
  • Rail Crossing Consolidation
  • Rail Permitting
  • Rail Safety Analytics
  • Railroad
  • Sewer Coordination
  • Signalization Design
  • Stormwater Management
  • Stormwater Pollution Prevention Plan (SWPPP)
  • Stormwater Utilities
  • Structural Engineering
  • Traffic Studies, Management and Design
  • Utility Coordination
  • Utility Design and Coordination
  • Value Engineering