McCaslin Bridge Over US 36 Closing for Arch Installation

December 22, 2015 - Denver Metro/CDOT Region 1 - Closure begins at 11 p.m. on Dec. 23 through 7 a.m. on Dec. 24.

SUPERIOR/LOUISVILLE – As part of the U.S. 36 Express Lanes Project, the Colorado Department of Transportation (CDOT) will close the McCaslin Boulevard Bridge over U.S. 36 beginning at 11 p.m. on Dec. 23, reopening it at 7 a.m. on Dec. 24.

This closure is necessary to install the arch over the median on the bridge. During the closure, all eastbound and westbound U.S. 36 on- and off-ramps to McCaslin Boulevard will remain open with right turn access only. Left turns and through movements from the ramps to access McCaslin Boulevard will be closed during the installation. The detour routes are as follows:

Northbound McCaslin Boulevard Detour Route:

  • Take the on-ramp to eastbound U.S. 36 from McCaslin
  • Exit at Interlocken Loop, head northbound to the Interlocken on-ramp to westbound U.S. 36
  • Exit at the westbound U.S. 36 off-ramp to McCaslin Boulevard to northbound McCaslin Boulevard

Southbound McCaslin Boulevard Detour Route:

  • Take the on-ramp to westbound U.S. 36 from McCaslin
  • Exit at Foothills Parkway, to the Table Mesa on-ramp to eastbound US 36
  • Exit at the eastbound U.S. 36 off-ramp to southbound McCaslin Boulevard

Prior to the full closure, at 10 p.m., McCaslin Boulevard will have northbound and southbound lane restrictions across the bridge with one lane of travel open in both directions. Alternate routes are advised. Local traffic is encouraged to use Cherryvale Road, 88th Street or Interlocken Loop as alternative north-south routes to travel between Louisville and Superior.

The U.S. 36 Express Lanes Project is a multi-modal project that is building an express lane in each direction on U.S. 36, in addition to the two free general purpose lanes. The Express Lanes accommodate High Occupancy Vehicles (HOV), Bus Rapid Transit (BRT), which will start running in early 2016, and tolled vehicles. In addition, the project is replacing several bridges, building a commuter bikeway, adding BRT improvements, and installing Intelligent Transportation Systems (ITS) for tolling, transit and traveler information, and incident management.  Phase 1, from Federal Boulevard to 88th Street in Louisville/Superior, opened in July of 2015. Phase 2, from 88th Street to Table Mesa Drive in Boulder, is on track to be completed in early 2016.

For more information about the project, call 303-404-7042 or go to or our mobile website at To receive free email updates during the project, click on the cell phone icon in the upper right corner. You can then subscribe to a variety of lists including “US 36 Express Lanes Project.”