Colo. Rev. Stat. § 37-85-104
Every board of county commissioners, upon examination of such affidavit, or from the oaths of witnesses in addition thereto, if it finds that the facts sworn to show the application to be in good faith, and that there are reasonable grounds to believe that unjust rates of compensation are or are likely to be charged or demanded for water from such ditch, canal, conduit, or reservoir, shall enter an order fixing a day not sooner than twenty days thereafter nor later than the third day of the next regular session of the board, when they will hear all parties interested in such ditch, or other waterworks, or parties interested in procuring water therefrom for any of the said uses, as well as all documentary or oral evidence or depositions, taken according to law, touching the said ditch or other work and the cost of furnishing water therefrom.
C.R.S. § 37-85-104
For the taking of depositions, see C.R.C.P. 26 to 37.