(a) Black powder shall be used for blasting only when a desired result cannot
be obtained with another type of explosive, such as in quarrying certain types
of dimension stone.
(b) Containers of black powder shall be--
(2) Kept in a totally enclosed cargo space while being transported by a
(3) Securely closed at all times when--
(b)(3)(i) Within 50 feet of any magazine or open flame,
(b)(3)(ii) Within any building in which a fuel-fired or exposed-element electric
heater is operating, or
(b)(3)(iii) In an area where electrical or incandescent-particle sparks could result
in powder ignition; and
(4) Open only when the powder is being transferred to a blasthole or another
container and only in locations not listed in paragraph (b)(3) of this
(c) Black powder shall be transferred from containers only by pouring.
(d) Spills shall be cleaned up promptly with nonsparking equipment.
Contaminated powder shall be put into a container of water and shall be
disposed of promptly after the granules have disintegrated, or the spill area
shall be flushed promptly with water until the granules have disintegrated
(e) Misfires shall be disposed of by washing the stemming and powder charge
from the blasthole, and removing and disposing of the initiator in accordance
with the requirement for damaged explosives.
(f) Holes shall not be reloaded for at least 12 hours when the blastholes have
failed to break as planned.
U.S. Department of Labor | Mine Safety and Health Administration (MSHA) | 1100 Wilson Boulevard, 21st Floor | Arlington, VA 22209-3939 www.msha.gov | Telephone: (202) 693-9400 | Fax-on-demand: (202) 693-9401