Okla. Stat. tit. 45, § 45-528.1: Water on cutter bars and rock drills - Use required

In order to promote the safety in coal mines by eliminating the

hazards of rock dust in coal mines, it is hereby made the duty of

every person or persons, partnership, association, corporation,

owner, operator and/or lessee of any coal mine in this state to

employ and use water on the cutter bars on all mining machines while

cutting rock in said mines, and on all rock drills while drilling in

said mines in rock. Rotary roof or rock drills must use water or an

approved type dust collector.