N.Y. Labor Law § 411: Ingress and egress

§ 411. Ingress and egress. The commissioner shall require that a mine

operating through either a vertical or inclined shaft, or a horizontal

tunnel, shall have not less than two adequate and accessible outlets, at

least one hundred and fifty feet apart, as a condition precedent to

employment of any person in the mine. The subterranean workings shall

connect such outlets with each other. They shall at all times provide

safe and separate passage between the subterranean workings and the

surface.