I-76 Corridor Improvements Between Iliff & Crook Interchanges

About the Project:

The Colorado Department of Transportation and Castle Rock Construction began a concrete panel replacement and diamond grinding project on July 22 on I-76 from the Crook interchange (Mile Point 150) to two miles west of the Iliff interchange (MP 132). The anticipated completion date is November 2025.

The initial phase began at the Crook interchange and involved constructing several westbound to eastbound crossover detours to facilitate head-to-head traffic. This configuration will ensure crew safety and minimize disruptions to traffic flow during construction. With the crossovers now complete, crews will move on to the westbound concrete panel replacement, mainline paving, diamond grinding, and sawing and sealing. Damaged, cracked, or improperly seated concrete panels will be replaced to prevent further road deterioration.

The Crook Bridge will undergo further enhancements. The bridge roadway will be milled and overlaid, and guardrails will be replaced. Other improvements will include new sign replacements and final striping for improved safety.

Construction will pause for the winter in mid-November, and the remaining work will resume in May 2025 after the winter shutdown.

Project Benefits

  • Concrete panels that are cracked, broken and not seated properly will be replaced to mitigate further deterioration of the road
  • Diamond grinding the roadway will take place to improve the smoothness and surface texture of the concrete pavement. This method involves the use of diamond saw blades to grind the surface of the pavement, removing irregularities, bumps, and imperfections resulting in a much smoother ride for vehicles.
  • Installation of new signs and final striping will improve safety, efficiency, and communication for motorists
  • Guardrails will be upgraded to prevent vehicles from leaving the roadway, reducing the severity of crashes and minimizing the risk of injuries and fatalities

Work Schedule:

  • Monday through Friday: Work hours are 7 a.m. to 5 p.m.
  • Weekend work may be required
  • The work schedule is weather-dependent and subject to change

Traffic Impacts:

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

  • Motorists can anticipate intermittent left lane closures with possible lane shifts from Mile Point 130 to MP 132, near the Iliff interchange
  • A 24/7 single-lane, head-to-head traffic configuration from MP 142 to MP 150 is in place
  • There is a 12-foot width restriction through the construction zone
  • The speed limit is 55 MPH through the work zone
  • Caution: Construction vehicles entering and exiting the work area
  • For current road conditions, visit COtrip.org.

Work this Week & Lane Closures for I-76 Interchanges

Project Facts

  • Construction Cost: $20 Million
  • Contractor: Castle Rock Construction
  • Timeline: July to November 2025
  • Location: I-76 between Iliff and Crook Interchanges
    • Nearest Town/City: Iliff to Crook
    • Mile Point(s): MP 132 to 150
    • County: Logan
I-76 work zone from the Crook interchange (MP150) to two miles west of the Iliff interchange (MP 132)
I-76 work zone from the Crook interchange (MP150) to two miles west of the Iliff interchange (MP 132)