I-25 and Crystal Valley interchange project (Town of Castle Rock)

About the Project:

The Town of Castle Rock in collaboration with the Colorado Department of Transport and Douglas County are construction a new interchange at I-25 and Crystal Valley Parkway including a new bridge over I-25, reconstruction of Frontage Roads and new local road connections on both side of I-25. This top transportation priority will improve safety and mobility in the surrounding community and provide a key regional transportation link from I-25 to southern Castle Rock and Douglas County.

Project Benefits

  • Provide new crossing over I-25 reduce distance for east/west travel on Crystal Valley Parkway
  • New on- and off-ramps at Crystal Valley Parkway to access I-25
  • New roundabout east of I-25 to increase flow of traffic and reduce congestion
  • Frontage Road reconstruction to tie-into the new interchange and roundabout
  • New bridge over the Railroad to allow for future expansion planned by BNSF.

Work Schedule:

To help reduce impacts on the traveling public during construction, most of this project will be constructed in phases, with work occurring outside of the active travel lanes.

  • Work will last from early 2024 through early 2027
  • Working hours 6 a.m. through 6 p.m., Monday to Friday
  • Some overnight and weekend work is expected

Traffic Impacts:

Motorists and pedestrians can expect the following impacts during the period of construction:

  • Lane closures in both directions of Crystal Valley Parkway
  • Traffic shifts on Crystal Valley Parkway, Frontage Roads and I-25
  • Reduced speeds through the work zone
  • Narrowed lanes and reduced shoulders
  • Flagging operations will be in place along local roads to safely direct traffic through construction activities
  • Full closure of the Front Range (Plum Creek) Trail.
  • Signs will be posted to alert motorists to the closures and available detour routes
  • Refer to COtrip.org for real-time travel conditions and road closures

Project Facts

  • Construction Cost: $120 Million
  • Contractor: Kraemer NA
  • Timeline: Early 2024  through Early 2027
  • Location: I-25 and Crystal Valley Parkway interchange  
    • Nearest Town/City: South of Castle Rock
    • Mile Point(s): MP178.50 to 179.0
    • County: Douglas