Section 445A.437 - Minimum design criteria: Tailings impoundments1. A tailings impoundment must utilize a system of containment equivalent to: (a) Twelve inches of recompacted native, imported, or amended soils which have an in place recompacted coefficient of permeability of no more than 1x10-6 cm/sec; or(b) Competent bedrock or other geologic formations underlying the site which has been demonstrated to provide a degree of containment equivalent to paragraph (a).2. An alternate level of containment may be required by the Department for all of the tailings impoundment or for a portion thereof after considering the following factors: (a) The anticipated characteristics of the material to be deposited;(b) The characteristics of the soil and geology of the site;(c) The degree to which the hydraulic head on the impoundment liner is minimized;(d) The extent and methods used for recycling or detoxifying fluids;(e) Pond area and volume;(f) The depth from the surface to all groundwater; and(g) The methods employed in depositing the impounded material.Nev. Admin. Code § 445A.437
Added to NAC by Environmental Comm'n, eff. 9-1-89-Substituted in revision for NAC 445.24368