2023-02-012023-02-01https://hdl.handle.net/11124/16255Mine report no. 1692.Typescript (carbon copy).Some facts about pollution May 26, 1936 -- Letter of correspondence regarding the introduction of a bill concerning the impounding of mine tailings, dated February 20, 1919.reportsengIn copyright - non-commercial use permitted (http://rightsstatements.org/vocab/InC-NC/1.0/).Tailings (Metallurgy)Water -- Pollution -- ColoradoMineral industries -- Waste disposal -- ColoradoText