30 CFR 57.20003 - Housekeeping.
At all mining operations—
(b) The floor of every workplace shall be maintained in a clean and, so far as possible, dry condition. Where wet processes are used, drainage shall be maintained, and false floors, platforms, mats, or other dry standing places shall be provided where practicable; and
Title 30 published on 2013-07-01
no entries appear in the Federal Register after this date.