Simpson v. Cotton Creek Circles, LLC, 181 P.3d 252 (Colo. Sup. Ct. 2008)

(state’s confined aquifer rules upheld; rules based on finding that San Luis Valley’s confined aquifer is overappropriated and any new groundwater withdrawals must be matched in equal measure to amount withdrawn; trial court’s holding that rules do not violate either CO statutes or CO Constitution upheld; confined aquifer does not contain any unappropriated water, thus restrictions on withdrawals from the aquifer do not violate the constitutional right to appropriate).