Colo. Rev. Stat. § 37-45-108
The district court sitting in and for any county in this state is hereby vested with jurisdiction when the conditions stated in section 37-45-109 are found to exist to establish water conservancy districts which may be entirely within or partly within and partly without the judicial district in which said court is located for conserving, developing, and stabilizing supplies of water for domestic, irrigation, power, manufacturing, and other beneficial uses as provided in this article; but the terms of this article shall not be construed to confer upon such district court jurisdiction to hear, adjudicate, and settle questions concerning the priority of appropriation of water between districts organized under this article and ditch companies and other owners of ditches drawing water for irrigation purposes from the same stream or its tributaries, and jurisdiction to hear and determine such questions of law and questions of right growing out of or in any way involved or connected therewith are expressly excluded from this article and shall be determined in the proper county as otherwise provided by the laws of the state of Colorado.
C.R.S. § 37-45-108