Colo. Rev. Stat. § 34-64-104
Before the right of condemnation may be exercised for the acquisition of property or any interest therein for underground storage of natural gas, said natural gas public utility shall make application to the commission for an order approving the proposed storage project. No such order shall be issued by the commission unless it shall be based upon substantial evidence and shall contain findings that the underground storage of natural gas in the land sought to be condemned is in the public interest and welfare, and that the storage reservoir is suitable and practicable, and that the formation or formations sought to be condemned are nonproductive of oil or gas in commercial quantities under either primary or secondary recovery methods.
C.R.S. § 34-64-104