Colo. Rev. Stat. § 37-40-102
Agencies within the department of natural resources of the state of Colorado, quasi-municipal corporations, and political subdivisions of the state, including, but not exclusively, counties, towns, cities, city and counties, water conservancy districts, water conservation districts, water and sanitation districts, conservation districts, drainage districts, and special improvement districts are authorized to become members of organizations existing or to be organized within the state of Colorado, to assist in or contribute to the protection, conservation, and development of water within the state of Colorado. Any such organization shall be construed to be an instrumentality of the agencies and political subdivisions that are members thereof. No such organization shall be ineligible under this section by virtue of the fact that it also admits private individuals and organizations to membership.
C.R.S. § 37-40-102