§75.333. Ventilation controls. — Inbound Citations

(o) Locations where separations of intake and return air courses will be built and maintained to other than the third connecting crosscut outby each working face (see § 75.333(b)(1)).

(4) Ventilated with intake air that is coursed into a return air course or to the surface and that is not used to ventilate working places, using ventilation controls meeting the requirements of § 75.333(e);

(w) Locations where entries will be advanced less than 20 feet from the inby rib without a crosscut being provided where a line brattice will be required. (see § 75.333(g)).

(ii) §§ 75.333(h) and 75.370(a)(1)—ventilation, methane;

(ii) §§ 75.333(h) and 75.370(a)(1)—ventilation, methane;

(ii) §§ 75.333(h) and 75.370(a)(1)—ventilation, methane;

(ii) §§ 75.333(h) and 75.370(a)(1)—ventilation, methane;