§ 33.25. Shelters.

 (a)  There shall be provided at a safe distance from the working face in each pit or quarry shelters or refuge places. The shelters or refuge places shall be of a capacity sufficent to accommodate all men working in the danger zone unless they are removed from the pit or quarry when blasting is being done.

 (b)  When blocks or loaded rubbish boxes are being hoisted out of a pit or quarry, the hook-on, tag man or pit or quarry foreman shall insure that all channel machine operators and all other employes in the danger zone retire to a place of safety until the lift has reached the surface.