§ 33.144. Entries, roadways, haulage ways and trestles.

 (a)  Condition of roadways. All roadways shall be maintained in good condition. They shall be kept well drained and properly surfaced.

 (b)  Drainage of main entries. All main entries shall be drained by a drainage ditch of sufficient size to keep the roadbed in good condition. If conditions are the that the main entries or haulage ways do not have sufficient grade to drain properly, pumps or other mechanical devices for removing water shall be installed.

 (c)  Walkways on trestles. On trestles where persons are permitted to walk there shall be a walkway on at least one side. This walkway shall extend at least 2 feet 6 inches beyond the side of the widest cars used on the trestle. The outer edge of the walkway shall be equipped with a standard railing and toeboard. If conditions require employes to work on both sides at the dumping point, both sides of the track shall be accessible either by means of walkways or working platforms.

 (d)  Size of main entries and haulage ways. The size of main entries and haulage ways shall be as follows:

   (1)  All main entries and haulage ways shall be of a height sufficient to permit a person to walk upright wherever the thickness of the vein or seam will permit. All main entries and haulage ways shall be of a width sufficient to permit persons to pass moving cars with safety.

   (2)  When mud sills are used, all legs for timber shall be set in notches in the mud sill. When mud sills are not used, the legs shall be properly hitched in the bottom to prevent the sides from pushing timber. In no case shall a timber be less than 6 feet 9 inches from rail to collar.

   (3)  Wherever possible, collars shall be at least 7 feet, notch to notch, legs shall be at least 7 feet, mud sill to collar, and mud sills shall be at least 9 feet, notch to notch. When it is impracticable to follow these minimum specifications, for reasons which shall be approved by the Department or its authorized representative, safety holes of ample dimensions and not more than 150 feet apart shall be made on one side of the passageway. All passageways and safety holes shall be kept free from all obstructions and the roof and sides shall be made secure, by means of lagging if necessary.

   (4)  In order to permit the brakeman to operate the brake in safety, when mine cars are provided with hand-operated brakes, the clearance on the side where the brakes are operated shall be 2 feet 6 inches.