Colo. Const. art. XV, § 14

Railroad or telegraph companies - consolidating with foreign companies. If any railroad, telegraph, express or other corporation organized under any of the laws of this state, shall consolidate, by sale or otherwise, with any railroad, telegraph, express or other corporation organized under any laws of any other state or territory or of the United States, the same shall not thereby become a foreign corporation, but the courts of this state shall retain jurisdiction over that part of the corporate property within the limits of the state in all matters which may arise, as if said consolidation had not taken place.