30 CFR § 57.22223
Crosscuts before abandonment (III mines).
A means of ventilating faces shall be provided before workings are abandoned in unsealed areas, unless crosscuts are provided within 30 feet of the face.
30 CFR § 57.22223
Crosscuts before abandonment (III mines).
A means of ventilating faces shall be provided before workings are abandoned in unsealed areas, unless crosscuts are provided within 30 feet of the face.
