Colo. Rev. Stat. § 35-70-121
Whenever, by reason of location, similarity of problems, and need for mutual assistance, the purpose of this article may be more economically, completely, and satisfactorily performed and accomplished thereby, two or more conservation districts may cooperate with each other by the joint exercise of the powers granted in section 35-70-108. The nature and extent of such cooperation and the duties and obligations of and benefits to the respective cooperating districts and interests in property that may be jointly acquired and used shall be determined by contract to be entered into between or among the cooperating districts, subject to the bylaws adopted by each of such districts and to the direction of the qualified voters at any regular or regularly called special meeting of each such district.
C.R.S. § 35-70-121