956                                       LAWS OF MARYLAND                            [Ch. 4

PERMITTED TO ACCUMULATE EXCESSIVELY ON ROADWAYS AND
ALONG CONVEYOR LINES. If ANY MINING OPERATION RAISES
AN EXCESSIVE AMOUNT OF DUST INTO THE AIR, WATER OR
WATER WITH A WETTING AGENT ADDED TO IT OR ANOTHER
EFFECTIVE METHOD SHALL BE USED TO ALLAY THE DUST AT
ITS SOURCE.

REVISOR'S NOTE: This subsection presently appears
as Article 66C, section 610 of the Code.
The only changes made are in style.

(E) ROCK-DUSTING REQUIRED.—EVERY MINE, EXCEPT A
MINE OR LOCATION IN A MINE IN WHICH THE DUST IS TOO
WET OR HIGH IN INCOMBUSTIBLE CONTENT TO PROPAGATE AN
EXPLOSION, SHALL BE ROCK-DUSTED TO WITHIN 60 FEET OF
EACH ACTIVE WORKING FACE. EVERY OPEN CROSSCUT WITHIN
THE 60 FOOT ZONE SHALL BE ROCK-DUSTED. HOWEVER, IF
THE DUST IS WET OR BECOMES DRY, THE MINE OR PORTION
AFFECTED SHALL BE ROCK-DUSTED AS SOON AS IT BECOMES
DRY.

REVISOR'S NOTE: This subsection presently appears
as Article 66C, section 611(a) of the Code.
The only changes made are in style.

(C)       HAULAGEWAYS, ENTRIES, ROOMS, AND
CROSSCUTS.—-IN ANY PARTIALLY ROCK-DUSTED MINE OR IN A
MINE WHICH IS REQUIRED TO START ROCK-DUSTING,
HAULAGEWAYS AND PARALLEL ENTRIES CONNECTED BY AN OPEN
CROSS-DUSTED FOR AT LEAST 1,000 FEET OUT FROM THE
JUNCTION WITH FIRST ACTIVE ENTRY. AT THIS JUNCTION,
THE ROOMS, ENTRIES, AND CROSSCUTS SHALL BE ROCK-DUSTED
BY GENERALIZED ROCK-DUSTING AS PROVIDED IN SUBSECTION
(A).

REVISOR'S NOTE: This subsection presently appears
as Article 66C, section 611(b) of the Code.
The only changes made are in style.

(D)    DISTRIBUTION.--___WHERE ROCK DUST IS APPLIED,

IT SHALL BE DISTRIBUTEE ON THE TOP, FLOOR, AND SIDES
OF EACH OPEN PLACE AND MAINTAINED IN A QUANTITY SO THE
INCOMBUSTIBLE CONTENT OF THE MINE DUST IS NOT LESS
THAN 65 PERCENT.

REVISOR'S NOTE: This subsection presently appears
as Article 66C, section 611(c) of the Code.
The only changes made are in style.

7-445. BOREHOLES.