of egress is by vertical shaft, the owner, lessee or agent shall
provide adequate fire protection to secure the safety of such shaft,
or shafts, and, when but one shaft is the only available means of
egress, shall keep in attendance a competent person at all times
while persons are inside of such mine. (Penalty, Sec. 976.)


Sec. 931. [=Separate traveling ways.=] The owner, lessee or agent of
a mine shall provide and maintain, in safe condition for the purpose
provided, two separate and distinct traveling ways from the interior
workings of the mine, each of which shall be available to not less
than one opening to the surface. One of such traveling ways may be
designated by such owner, lessee or agent as the principal traveling
way. One of such traveling ways may be designated as the escapement
way. The provisions of this section shall not prohibit such owner,
lessee or agent from designating more than one principal traveling
way, or more than one escapement way, so long as the provisions
hereof are complied with.


[=Traveling ways and refuge holes.=] The owner, lessee or agent of a
mine worked by shaft, shall provide and keep free from obstruction,
a traveling or passage way from one side of the shaft bottom to the
other. Slopes and mechanical haulage ways used as traveling ways by
persons employed in a mine shall be made of a sufficient width to
give not less than three feet of space between the rib and adjacent
rail of track to permit persons to pass moving cars with safety. If
found impracticable to make such slopes or mechanical haulage ways
of sufficient width as provided, refuge holes not less than six feet
in width and clearing the adjacent rail of the track not less than