Section 57.6160 - Main facilities (a) Main facilities used to store explosive material underground shall be located- - (1) In stable or supported ground;
- (2) So that a fire or explosion in the storage facilities will not prevent escape from the mine, or cause detonation of the contents of another storage facility;
- (3) Out of the line of blasts, and protected from vehicular traffic, except that accessing the facility;
- (4) At least 200 feet from work places or shafts;
- (5) At least 50 feet from electric substations;
- (6) A safe distance from trolley wires; and
- (7) At least 25 feet from detonator storage facilities.
(b) Main facilities used to store explosive material underground shall be- - (1) Posted with warning signs that indicate the contents and are visible from any approach;
- (2) Used exclusively for the storage of explosive material and necessary equipment associated with explosive material storage and delivery:
- (i) Portions of the facility used for the storage of explosives shall only contain nonsparking material or equipment.
- (ii) The blasting agent portion of the facility may be used for the storage of other necessary equipment.
- (3) Kept clean, suitably dry, and orderly;
- (4) Provided with unobstructed ventilation openings;
- (5) Kept securely locked unless all access to the mine is either locked or attended; and
- (6) Unlighted or lighted only with devices that do not create a fire or explosion hazard and which are specifically designed for use in magazines.
(c) Electrical switches and outlets shall be located outside the facility.
053-3 Wyo. Code R. § 57.6160