Crews Start Project to Reinforce Rock Slip Area on CO 133 McClure Pass

May 17, 2018 -

On Monday, May 21, crews will start work that will reinforce a fault (aka, a rock slip) on Colorado Highway 133, on the south side of McClure Pass. Work on this $1.3 million project is expected to be complete in mid-October, weather permitting.

Example of Anderson Drilling’s rebar cage.jpg

Work will stabilize and reinforce a landslide below the highway to reduce further slipping or future rockslides. Specifically, crews will:

  • Excavate about 3,750 tons (or 3,000 cubic yards) of rock.
  • Drill about 18, 60-foot-deep caissons, into which they'll position vertical and horizontal reinforcing supports (or rebar cages).
  • Install 24-inch-diameter rebar cages—circular sets of 18, 60-foot-long sections of rebar.
  • Build a tieback system, which incorporates high-strength steel-strand anchors that are grouted in-place to anchor the vertical caissons.
  • Repair and rebuild the road.
  • Complete earthwork and erosion control measures.
  • Stripe and add signs.

Travel Impacts

  • Through mid-October 2018:
    • Work hours are 7 a.m. - 7 p.m., Monday through Friday
    • Single-lane, alternating travel through the work zone with periodic traffic holds of up to 15 minutes
    • Delays exceeding 15 minutes
    • Expect a 12-foot width restriction
    • Avoid distractions when driving through the work zone and go slow

Adjacent Work

This summer/fall, there will be two projects underway on CO 133:

  1. CO 133 Bowie Resurfacing & Bridge Repair:
  2. CO 133 McClure Pass to Redstone Resurfacing