Colo. Rev. Stat. § 29-8-135
If the owner or person in possession of any lot or parcel of land prevents entrance upon the lot or parcel for conversion purposes, or fails to perform under section 29-8-133 and has not otherwise provided for underground service connections to the property in a manner satisfactory to the public utility involved, within sixty days from the time the converted facilities are ready for connection to the property, the electric or communication service shall be disconnected and removed and all overhead electric or communication facilities providing service to any building, structure, and improvement located upon such lot or parcel shall be disconnected. Written notice of disconnection shall be given at least twenty days prior to disconnection by leaving a copy of such notice at the principal building, structure, or improvement located upon such lot or parcel.
C.R.S. § 29-8-135