Employment in all underground mines, underground workings, and smelters is declared to be injurious to health and dangerous to life and limb.
Source: L. 13: p. 306, § 1. C.L. § 4172. CSA: C. 97, § 100. CRS 53: § 80-7-1. C.R.S. 1963: § 80-14-1. L. 87: Entire section amended, p. 376, § 1, effective June 20.