Colo. Rev. Stat. § 37-43-207
In order to carry out the purposes of this part 2, a contracting district shall have the power of eminent domain to acquire, within the boundaries of the district, existing lateral ditches, pipelines, and appurtenances thereto and interests therein, easements, rights-of-way, and such other rights and interests in property, including property devoted to a public purpose, as may be required in order to carry out the purposes of this part 2. The power of eminent domain granted to a contracting district pursuant to this section shall not extend to the acquisition of: Water rights; laterals which have been and as of April 6, 1988, are improved so as to achieve the purposes of the federal "Colorado River Basin Salinity Control Act" as determined by the United States bureau of reclamation; and ditch rights in a lateral with respect to which the owners of a majority of the acreage entitled to receive water therefrom have not agreed to have such lateral improved under the provisions of such federal act. If the compensation to be paid for the taking or acquisition of interests in property by a contracting district is to be paid or reimbursed by the United States, the question of whether such compensation shall be made need not be submitted to a vote of the qualified voters of such district.
C.R.S. § 37-43-207