Colo. Rev. Stat. § 36-3-119
As provided in the act of congress set out in section 36-3-103, all moneys received by the board from the sale of lands selected under the provisions of this article shall be deposited with the state treasurer, and such sums as may be necessary shall be available for the payment of the expenses of the board and of the state engineer's office incurred in carrying out the provisions of this article. Such expenses shall be paid by the controller in the manner provided by law, upon vouchers duly approved by the board for the work performed under its direction and by the state engineer for all work performed by the state engineer's office; and any balance remaining over and above the expense necessary to carry out the provisions of this article shall constitute a trust fund in the hands of the state treasurer, to be used for the reclamation of other desert lands.
C.R.S. § 36-3-119