Colo. Rev. Stat. § 33-10-112
There is hereby created a fund designated as the federal aid projects income fund to which shall be credited certain revenues and earnings derived from properties purchased and operated jointly by the United States government and the state of Colorado under the provisions of this article, and the provisions of the acts of congress referred to therein, and the rules and regulations of the United States department of the interior. Such revenues and earnings so credited shall be limited to those specific revenues and earnings to which each has a right under the provisions of cooperative agreements establishing such rights. All moneys credited under the provisions of this section are specifically appropriated for the purposes for which such moneys may accrue.
C.R.S. § 33-10-112