OURAY, Colo. (CBS4) – The Colorado Department of Transportation announced that Highway 550 on Red Mountain Pass will remain closed for avalanche mitigation following a slide on Sunday night.

(credit: CDOT)

(credit: CDOT)

The original slide occurred on the road midway between Ouray and Silverton on the border between Ouray and San Juan counties.

“It was about 6 feet high and 200 feet long on the highway center line,” Nancy Shanks with CDOT said in a statement. “Crews closed the road, cleared the slide, escorted waiting traffic through and fully closed the pass again at midnight.”

(credit: CDOT)

(credit: CDOT)

Shanks said the highway will stay closed until needed avalanche mitigation can be completed. She said there are also delays on Coal Bank and Molas passes for mitigation work.