§ 45-420. Mine shafts - Signaling methods - Hoisting regulations.

At all mine shafts there shall be two effective methods of signaling between the surface and the bottom of the shaft and one of such methods shall be a telephone or speaking tube.  In hoisting or lowering men to the bottom of the shaft the hoisting engineer shall in all cases give a return signal; and calling, or rapping on metal shall not be accepted as a method of signaling.  The hoisting speed shall not exceed five hundred (500) feet per minute when hoisting or lowering men; and no man shall be hoisted above the ground level of the shaft except in case of inspection or repair.  And in no case shall more than four men be allowed to ride in a hoisting can or tub at one and the same time; and men shall not be lowered with a loose drum.  At the bottom of the shaft, and at each landing in the shaft there shall be installed adequate "skiddoo" or warning signals.  No person shall give wrong signals intentionally, or ride on the shaft conveyance without having first given the hoisting engineer the man hoist signal unless such man signal shall have been given by the station man or tub hooker.

Laws 1929, c. 42, p. 49, § 10.