Colorado Revised Statutes Title 37. Water and Irrigation § 37-87-114.5. Applicability of provisions--exemptions

(a) Structures not designed or operated for the purpose of storing water;

(b) Mill tailings impoundment structures permitted under article 32 or 33 of title 34, C.R.S.;

(c) Uranium mill tailings and liquid impoundment structures permitted under article 11 of title 25, C.R.S.; except that the state engineer shall render such consultation as necessary for the permitting of such structures;

(d) Siltation structures permitted under article 33 of title 34, C.R.S.; or

(e) Structures which store water only below the elevation of the natural surface of the ground.