Article V - VENTILATION
- Section 70-501 - Operator or superintendent to provide and maintain constant and adequate supply of pure air for each mine
- Section 70-502 - Main fans installed on surface; auxiliary fans underground to be fire resistant
- Section 70-503 - Furnace not to be used to ventilate mine
- Section 70-504 - Minimum quantity provided-two hundred cubic feet per minute for each person
- Section 70-505 - Mine foreman in charge of ventilation; speed of ventilators
- Section 70-506 - Ventilators to be provided with ventilating pressure recording instruments
- Section 70-507 - Ventilating currents sufficient to render harmless all gases
- Section 70-508 - Worked out or abandoned parts of mine to be kept free of bodies of gases
- Section 70-509 - Not more than seventy-five persons employed on one split
- Section 70-510 - Inlet and return air passages separated by pillar of stone or coal
- Section 70-511 - Air passages sufficient in area to allow passage of not less than two hundred cubic feet of air per minute per person
- Section 70-512 - Crosscuts closed with brick or other suitable building material
- Section 70-513 - Doors hung so as to be self-closing
- Section 70-514 - Main doors to have attendant
- Section 70-515 - Main doors placed to prevent temporary stoppage of air current
- Section 70-516 - Extra main door kept standing open
- Section 70-517 - Frame work in main doors to be secured in stone; brick to be laid in cement
- Section 70-518 - Air bridges to be of incombustible material
- Section 70-519 - Line brattice used from crosscut to face
- Section 70-520 - Chamber, breast shall have crosscut at face when finished
- Section 70-521 - Quantities of air measured weekly with anemometer by mine foreman recorded in report book; report of measurement sent to inspectors before twelfth of the month for preceding month
- Section 70-522 - Face of chamber, breast not to be advanced more than sixty feet beyond last open crosscut
- Section 70-523 - Persons failing to comply with provisions guilty of offense
- Section 70-524 - Sewage dumping into active abandoned mine prohibited