30 CFR § 57.8520
A plan of the mine ventilation system shall be set out by the operator in
written form. Revisions of the system shall be noted and updated at least
annually. The ventilation plan or revisions thereto shall be submitted to the
District Manager for review and comments upon his written request. The plan
shall, where applicable, contain the following:
(a) The mine name.
(b) The current mine map or schematic or series of mine maps or
schematics of an appropriate scale, not greater than five hundred feet to
the inch, showing:
(1) Direction and quantity of principal air flows;
(2) Locations of seals used to isolate abandoned
(3) Locations of areas withdrawn from the ventilation
(4) Locations of all main, booster and auxiliary fans not
shown in paragraph (d) of this standard.
(5) Locations of air regulators and stoppings and
ventilation doors not shown in paragraph (d) of this standard;
(6) Locations of overcasts, undercasts and other airway
crossover devices not shown in paragraph (d) of this standard;
(7) Locations of known oil or gas wells;
(8) Locations of known underground mine openings adjacent
to the mine;
(9) Locations of permanent underground shops, diesel fuel
storage depots, oil fuel storage depots, hoist rooms, compressors, battery
charging stations and explosive storage facilities. Permanent facilities are
those intended to exist for one year or more; and
(10) Significant changes in the ventilation system
projected for one year.
(c) Mine fan data for all active main and booster fans including
manufacturer's name, type, size, fan speed, blade setting, approximate
pressure at present operating point, and motor brake horsepower rating.
(d) Diagrams, descriptions or sketches showing how ventilation is
accomplished in each typical type of working place including the approximate
quantity of air provided, and typical size and type of auxiliary fans
(e) The number and type of internal combustion engine units used
underground, including make and model of unit, type of engine, make and model
of engine, brake horsepower rating of engine, and approval number.
[60 FR 33719, June 29, 1995]