CDOT Rockfall Work on SH 82 Independence Pass

September 25, 2012 - PROJECT UPDATE - Northwestern Colorado/CDOT Region 3 - PITKIN COUNTY – The Colorado Department of Transportation and contractor Yenter Companies began a project in early September to repair and improve rockfall mitigation on SH 82 over Independence Pass.

Erosion and rockfall incidents following the installation of rockfall mitigation systems (such as wire mesh and rock bolts) on the pass in recent years have resulted in some damage to the existing systems in place, as well as the need for additional mitigation. The project is estimated to cost $137,000.

The project, which is scheduled for completion by October 10, will be underway at three sites west of the summit: (1) the lower Mechanically Stabilized Earth (MSE)* wall at approximately mile marker 59.9; (2) the upper MSE wall at approximately mile marker 60.2; and (3) the draped wire mesh system at approximately mile marker 60.3. (*An MSE wall stabilizes a slope by using horizontal reinforcement—typically a synthetic material—between layers of soil. Those on the pass have rock faces.

The work involves the following:

  1. Removing loose rock from beneath the wire mesh;
  2. Repairing sections of damaged mesh, patching holes and closing seam openings;
  3. Removing a fallen tree;
  4. Replacing approximately seven anchors along the top of the drape system.
  5. Installing 15,000 square feet of high strength wire mesh along an additional section.

NEW!! TRAFFIC IMPACTS: There are currently intermittent traffic stops near the work sites. From Monday, October 1, through the project’s completion on the 10th (weather permitting), there will be a single lane closure with alternating traffic for crane/lift work to hang replacement net. During that time period, motorists can anticipate up to 20 minute delays from 7 a.m. to 5 p.m. Monday through Friday.

For information on CDOT projects the public may call 511 from anywhere in the state, log onto or sign up to receive updates via email or text messaging by going to CDOT’s web site and choosing the green cell phone icon in the upper right corner.