CO FLAP 209(1), Cottonwood Pass

Added: Oct 14, 2016 12:32 pm

CO FLAP 209(1), Cottonwood Pass Road Gunnison County

This 12.5 mile project is for improvements to Cottonwood Pass road in Gunnison County Colorado. The project starts at the intersection of Cottonwood Pass road and CR 742 and ends at the top of the pass (Approximately 19 miles west of Buena Vista, CO).

Major work items include approximately:

·         132 acres of clearing and grubbing

·         326,000 cubic yards of roadway excavation

·         6,700 cubic yards of subexcavation with geotextile

·         3,300 cubic yards of cut slope rock buttress

·         1.2 acres of roadway obliteration

·         40,600 tons of asphalt concrete pavement, gyratory mix

·         56,800 tons of aggregate base

·         8,600 linear feet of 24 inch diameter culvert

·         300 linear feet of 36 inch diameter culvert

·         11,700 linear feet of underdrains

·         0.2 acres of wetland mitigation

ESTIMATED Cost: 

The estimated cost of construction is between $20 and $25 million.

SCHEDULE: 

It is anticipated that advertisement for this project occur in November 2016 with an award likely within 60 days after advertisement begins. The road will be closed to public travel within the project limits for the duration of the project, with a completion date of November 1, 2018.

Additional Information:

Cottonwood Pass Road begins at an elevation of 9,360 feet and reaches a height of 12,110 feet at the pass. The upper reaches are characterized by rugged topography and adverse climatic conditions. The project site has a narrow bench and sharp curves making for a very limited construction site. The adjacent terrain is generally steep with tall slopes. This project is located in a sensitive natural setting. Mitigation of wetland areas, on-site and nearby, are included in the project. Provisions will be necessary to protect Federal or State listed endangered, threatened, or special concern species. Provisions will include limitations on when and where work can occur. Contractor-furnished biological monitors will be required for some elements of the work. An 11 acre government-owned material source has been identified along the lower and flatter portion of the road. The quality of material is generally acceptable, but may require removal of unacceptable material or blending to produce aggregate for surface course or asphalt.