Colorado Department of Transportation and contractor Rock and Co. announced that crews have finished the first of two under-highway downhill retaining walls, known as crib walls, on U.S. Highway 550 on Molas Pass, south of Silverton. The second wall was reported to be near completion Wednesday.
Motorists will encounter single-lane alternating traffic through the half-mile project zone.
The replacement crib walls are constructed from layers of reinforced wire mesh, geo-textile fabric for drainage and special backfill materials. Most recently, work included drilling and the installation of micro-piles and rock reinforcement to create a sound foundation and stabilize large rock slabs below the walls. After the walls are built to highway level, crews will be able to pave the road surface and install a new guardrail.
Crews will start to remove the top layer of asphalt in the southbound lane on Monday, which will create an uneven surface through the half-mile project zone. On Oct. 2, new asphalt will start to be placed in northbound and southbound lanes.
While milling and asphalt operations take place, flagging crews will manage traffic in the project zone from 7 a.m. to 6 p.m. Monday through Saturday with anticipated 20 minute delays. After work hours and on Sundays, portable traffic-light signals will be in place to alternate traffic at 7-minute intervals.
The project is expected to be completed by mid-October.
For more information, call 209-3332 or email firstname.lastname@example.org, or visit www.codot.gov/projects/us-550-molas-pass-cribwalls.