Colo. Rev. Stat. § 37-3-115
In case it is necessary to pass any dredge boat or other equipment through a bridge or grade of any railroad company or other corporation, county, city, town, or other municipality, the board of directors shall give notice to the owner of said bridge or grade that the same shall be removed temporarily to allow the passage of such equipment or that an agreement be immediately entered into in regard thereto. The owner of said bridge or grade shall keep an itemized account of the cost of the removal and if necessary of the replacing of said bridge or grade, and the necessary and actual cost shall be paid by the district. In case the owner of said bridge or grade fails to commence or complete provision for the passage of said equipment within the time specified in the notice, the board of directors may remove such bridge or grade at its own expense, interrupting traffic in the least degree consistent with good work and without unnecessary damage or delay. In case it is hindered or prevented from so doing, the owner of said bridge or grade shall be liable for all damage resulting to the district therefrom.
C.R.S. § 37-3-115