Colorado Springs Metro Interstate Expansion (COSMIX)

The COSMIX project reconstructed nine miles of six lanes of Interstate 25, a 45-year old urban interstate through Colorado Springs. The project included the complete reconstruction of two major interchanges and 17 new bridges At the time, this was the second largest project ever undertaken by CDOT and was the second major design-build project for CDOT. The project remains today the largest highway project in the history of Colorado Springs on the most regionally significant transportation route.


  • Title: Colorado Springs Metro Interstate Expansion (COSMIX)
  • Client: Colorado Department of Transportation (CDOT)
  • State: Colorado