30 CFR § 71.400
Bathing facilities; change rooms; sanitary flush toilet facilities.
Each operator of a surface coal mine shall provide bathing facilities,
clothing change rooms, and sanitary flush toilet facilities, as hereinafter
prescribed, for the use of miners employed in the surface installations and
at the surface worksites of such mine. (Note: Sanitary facilities at surface
work areas of underground mines are subject to the provisions of
of this chapter et seq.)