All mines, except mines worked or operated primarily for coal, asphaltum, rock, limestone, dolomite, or other stone products, sand, gravel, clay, or earths, shall, for the purpose of valuation for assessment, be divided into two classes: Producing and nonproducing.
Source: L. 65: R&RE, p. 1102, § 1. C.R.S. 1963: § 137-6-3.
ANNOTATION
Annotator's note. The following annotations include cases decided under this section as it existed prior to its 1964 repeal and reenactment.
Classification of property for taxation permissible. So long as classification is based upon the nature of property justifying it, there is nothing to forbid legislative classification for the purposes of taxation or to prevent the fixing of valuation of different classes by different methods, provided that, by the method prescribed for a particular class of property, the burden of taxation is uniformly imposed upon that class, is just and equitable, and does not exempt it from bearing its fair proportion of the burden of taxation, as compared with other classes of property. In re House Bill No. 270, 9 Colo. 635, 21 P. 476 (1886); Foster v. Hart Consol. Mining Co., 52 Colo. 459, 122 P. 48 (1912).