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San Juan County OEM
Friday May 29th, 2026 :: 10:33 a.m. MDT

Alert

US 550 scheduled to fully close June 1 from 7 a.m. to 2 p.m. Molas to Red Mountain Pass. via CDOT for chip sealing operations

US 550 scheduled to fully close June 1 from 7 a.m. to 2 p.m.

Four-day chip seal operations planned between Molas Pass and Red Mountain Pass June 1 to 4

Southwest Colorado - Beginning Monday, June 1, crews will perform four-day surface treatment operations on US Highway 550 from Molas Pass (MP 64) to approximately three miles north of Silverton (MP 73), near County Road 7.  US 550 will be fully closed for one day, Monday, June 1 from 7 a.m. to 2 p.m. and then crews will transition to one-way alternating traffic for the next three days. Monday afternoon through Thursday afternoon motorists will encounter up to 15-minute delays, full stops and alternating traffic.

The one-day full-closure is required when crews are working along the high mountain pass corridor, south of Silverton, that is especially narrow with no shoulder area.

Motorists are urged to slow down and leave plenty of space between vehicles to avoid damage caused by loose stones and fresh paint striping. 

Drivers may consider an alternate route between Durango and Ridgway. This westerly route will add approximately one hour of additional driving time, taking approximately three hours from Durango to Telluride and ending in Ridgway (approximately 150 miles). Continuing south on US 550 to Silverton will add an additional 60 minutes of drive time (approximately 40 miles).

  • US 160 Durango to Mancos
  • CO 184 Mancos to Dolores
  • CO 145 Dolores to Placerville
  • CO 62 Placerville to Ridgway
  • US 550 Ridgway to Silverton 

Traffic Impacts 

Working hours will take place between 6:30 a.m. and 5 p.m., Monday through Thursday. US 550 will be fully-closed Monday, June 1 from 7 a.m. to 2 p.m. Traffic impacts include:  
  • Northbound Closure: Vehicles traveling northbound between Durango and Silverton will be stopped at Molas Pass (MP 64).
  • Southbound Closure: Vehicles traveling southbound between Silverton and Durango will be stopped in the town of Silverton (MP 70).
Traffic impacts beginning Monday, June 1 at 2 p.m., after the full closure include: 
  • Motorists should plan for 10 to 15-minute delays and should allow for extra travel time
  • Expect one-lane alternating traffic guided by a pilot vehicle
  • Motorists entering the highway from a driveway or intersection must wait for a pilot car before proceeding with the flow of traffic
  • A speed reduction of 40 MPH will be enforced through the work zone

Instructions:

Motorists are reminded to take the following precautions while traveling through the chip seal work zone. Road conditions and travel information: COtrip.org

Address/Location
San Juan County OEM
1557 Greene St
Silverton, CO 81433

Contact
Emergency: 9-1-1
Non-emergencies: 970-387-5531

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Alert Details

Severity:
Minor - Minimal to no known threat to life or property
Urgency:
Future - Responsive action SHOULD be taken in the near future
Certainty:
Observed - Determined to have occurred or to be ongoing
Category:
Public and private transportation
Event:
Road Closure

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