I-76 Corridor Improvements Between Iliff & Crook Interchanges

About the Project:

The Colorado Department of Transportation and Castle Rock Construction will begin a concrete panel replacement and diamond grinding project beginning July 22 on I-76 from the Crook interchange (Mile Point 149) to two miles west of the Iliff interchange (MP 134). The anticipated completion date is November 2025.

The initial phase will begin at the Crook interchange and involves 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. Once crossovers are in place, crews will begin the westbound concrete panel replacement, mainline paving, diamond grinding and sawing and sealing. Concrete panels that are cracked, broken and not seated properly will be replaced to mitigate further road deterioration.

The Crook Bridge will undergo further enhancements. The bridge roadway will be milled, 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:

• Daytime work hours are 7 a.m. to 5 p.m., Monday through Friday. Weekend work may be required.

Traffic Impacts:

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

• Multiple median crossovers will be constructed throughout the corridor to accommodate traffic.
• There will be a wide-width restriction of 12 feet where crossover detours are located.
• The speed limit will be reduced to 45 MPH at the crossover zones. The speed limit will remain 65 MPH for the rest of the construction zone.
• Caution: Construction vehicles entering and exiting the work zone.
• 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 132.07 to 149.03
  • County: Logan