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.
C.R.S. § 39-6-104
Classification of mines
Digitized from: Public.Law — Colorado Revised Statutes. Reproduced from public-domain Colorado statutes; confirm against the official source for the current text. Not legal advice.