The Colorado Department of Transportation will begin a project on Monday, Sept. 17, to reduce the potential for rockfall on SH 133 over McClure Pass. The rockfall mitigation consists clearing rock debris from the roadside ditch, scaling rock from the hillside (bringing rocks down with air bags inserted behind loose rock and also bringing them down by hand), installing rock reinforcement (with dowels and also a concrete mixture), and anchoring and installing wire mesh (or cable netting) to contain smaller rocks.
The work will be done on the north side of the pass near Marble, between mileposts 44 and 49.
During periods of rock scaling work (done each day), traffic will be stopped in both directions for up to 20 minutes. Delays may exceed 20 minutes as traffic queues are cleared in both directions. When scaling is not underway, travelers should still anticipate some delays and single-lane, alternating traffic, Monday through Friday (and some Saturdays) during daylight hours.
There will be a winter suspension of work likely starting around Nov. 1. The project will resume in April 2013 and will be completed in July 2013.
"McClure is ranked at the top of our rockfall hazard rating system," said Ty Ortiz, CDOT rockfall specialist. "The amount of rockfall we see here on an annual basis is quite a bit higher than what we see in many other sites around the state."
CDOT contracted the work to TK Mining for $2 million.
For information on CDOT projects statewide, the public may log on to www.cotrip.org or call 511.blog comments powered by Disqus