C.R.S. § 43-3-403: Authority to construct tunnels.

(1) The transportation commission is authorized to have constructed any tunnels between the east and west slopes of the state of Colorado for highway purposes as follows:

(a) In the event the state of Colorado receives a designation of an east-west national defense and interstate highway across the state of Colorado from the United States bureau of public roads, the transportation commission may have constructed along the route of such highway such tunnels as shall be determined jointly by the United States bureau of public roads and the transportation commission; but the cost of such tunnels shall be borne by the state of Colorado and the United States in such proportions as may be agreed upon between the transportation commission and the United States bureau of public roads.

(b) Repealed.

(2) The transportation commission may, with the approval of the governor, enter into a contract with a private individual, firm, or corporation for the construction, maintenance, and operation of one or more tunnels.