Canyon closures set Wednesday and Sept. 29 |

Canyon closures set Wednesday and Sept. 29

The Colorado Department of Transportation said that Interstate 70 between Grizzly Creek, Mile Marker 121, and Hanging Lake Tunnel will have intermittent closures on Wednesday, Sept. 23, and Tuesday, Sept. 29, for helicopter operations in Glenwood Canyon as work continues on the westbound lanes.

CDOT anticipates between five and seven stops per day, each lasting less than 20 minutes. The stops will occur approximately every hour beginning shortly after 8 a.m. Pedestrians also will be stopped along the Glenwood Canyon bike path.

“This is one of the last major hurdles we face in completing this project on time,” said Adam Cornely, CDOT project engineer. “A helicopter will be lifting 1,200 pounds of rockfall fencing materials into place between 100 feet and 400 feet above the roadway. Helicopter operations can be delicate in nature, so closing the road intermittently strikes the best balance between safety and keeping traffic moving.”

Crews are making every effort to minimize impacts to traffic. The stops will take place a maximum of once per hour, and begin at 8 a.m. in an attempt to maximize the helicopter’s productivity during peak weather conditions. All helicopter operations are extremely weather dependent, and may require additional stops and days to complete the work.

Drivers are asked to be aware that the helicopter will be operating in Glenwood Canyon several hundred feet above the road. During these times, traffic will remain open. CDOT advises drivers to remain focused on the road and follow all traffic regulations in the work zone.

Traffic will be stopped only when the helicopter lands, primarily for refueling.

Drivers accessing the live westbound lane between Grizzly Creek (MM 121) and Shoshone (MM 123), not mainline Interstate 70, are to expect a greater number of stops through the days the helicopter is operating.

This work is part of a $7.3 million project, which was awarded to Truesdell Corp. and has been under way all summer. In addition to rock fall fence replacements, the project includes bridge rail and bridge deck repairs.

Normal work hours are Monday through Friday during daylight hours. Some night and weekend work is anticipated.

CDOT would like to remind motorists that fines are doubled within the work zone. If you have questions or concerns about this project, call the project hotline at 970-930-8009 or email

To receive updates about road conditions in your area, visit and click on white envelope icon at the bottom of the page. Information about weekly lane closures is available at Updated road conditions are available at, by downloading the CDOT Mobile app or by calling 511 from anywhere in the state. Updates are also available via Twitter @coloradodot.


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