Requirements as to surface magazines; storage of explosives; explosion-proof illumination; use of nonmetallic tools.
Wyo. Stat. Ann. § 30-2-604
in effect(a) Separate surface magazines shall be provided for the storage of explosives and detonators.
(b) Surface magazines for storing and distributing high explosives shall be:
(i) Reasonably bulletproof and constructed of incombustible material or covered with fire-resistive material. The roofs of magazines so located that it is impossible to fire bullets directly through the roof from the ground, need not be bulletproof, but where it is possible to fire bullets directly through them, roofs shall be made bullet-resistant by material construction, or by a ceiling that forms a tray containing not less than a four (4) inch thickness of sand, or by other methods;
(ii) Provided with doors constructed of three-eighths (3/8) inch steel plate lined with a two (2) inch thickness of wood, or the equivalent;
(iii) Provided with floors made of wood or other nonsparking material and have no metal or gravel exposed inside the magazine;
(iv) Provided with suitable warning signs so located that a bullet passing directly through the face of a sign will not strike the magazine;
(v) Provided with properly screened ventilators. Equipped with no openings except for entrance and ventilation;
(vi) Kept locked securely when unattended.
(c) High explosives may also be stored in box-type distributing magazines which shall be constructed and used in accordance with rules established by the inspector.
(d) Main storage magazines shall be not less than one thousand (1,000) feet from any mine opening unless effectively barricaded.
(e) The supply kept in distributing magazines shall be limited to approximately one (1) day's requirements. Supplies of explosives and detonators may be distributed from the same magazine, if separated by at least a four (4) inch substantially fastened hardwood partition or the equivalent.
(f) The area surrounding magazines for not less than twenty-five (25) feet in all directions shall be kept free of rubbish, dry grass, or other materials of a combustible nature.
(g) If the explosives magazine is illuminated electrically, the lamps shall be of explosion-proof type, installed and wired so as to prevent minimum fire and contact hazards.
(h) Only nonmetallic tools shall be used for opening containers. Extraneous materials shall not be stored in an explosives or detonator magazine.
(j) Smoking, carrying smoker's articles, or open flame shall be prohibited in or near any magazine.
(k) Blasting agents shall be used and stored in accordance with rules established by the inspector.
(m) Contents stored in magazines pursuant to this section shall be inventoried once a month or after each use.
Source: WY Statutes (Official Site)URL: https://wyoleg.gov/statutes/compress/title30.pdfFetched: 10/4/2026