Colo. Rev. Stat. § 40-24-103
Any person, company, corporation, or association desiring in good faith to construct, maintain, and operate an electric railroad over, along, or across any county road within any county in this state may petition the board of county commissioners of such county for a franchise and right-of-way for the construction, maintenance, and operation of an electric railroad. The board of county commissioners, in accordance with the conditions provided in this section, may grant said right-of-way and franchise for a period not exceeding twenty years. Before any such person, company, association, or corporation commences the construction of any such electric railroad, there shall be filed with and approved by the board of county commissioners of any such county specifications and surveys with maps, showing all grades and curves of such proposed line of road, together with the exact location and description of all tracks, culverts, bridges, and poles, and the difference, if any, in all grades between such county road and the said proposed line of railroad. Before such specifications, surveys, or maps shall be so approved, at least ten days' public notice of the filing thereof shall be given by such board of county commissioners by publication in some newspaper of general circulation in such county and by the posting of a copy thereof in the office of the county clerk and recorder of such county.
C.R.S. § 40-24-103