(A) Surface entries and access to underground workings, including adits and slopes, shall be located, designed, constructed, and utilized to prevent or control gravity discharge of water from the mine.
(B) Gravity discharge of water from an underground mine, other than a drift mine subject to paragraph (C) of this rule, may be allowed by the chief, if it is demonstrated that:
(1) The discharge:
(a) Without treatment, satisfies the water effluent limitations of all applicable state and federal water quality standards; and
(b) The discharge will result in changes in the prevailing hydrologic balance that are minimal and approved postmining land uses will not be adversely affected; or
(2) All of the following three requirements are met:
(b) All water from the underground mine discharged from the treatment facility meets the effluent limitations of all applicable state and federal statutes and regulations; and
(c) Consistent maintenance of the treatment facility will occur throughout the anticipated period of gravity discharge.
(C) Notwithstanding anything to the contrary in paragraphs (A) and (B) of this rule, for a drift mine first used after August 16, 1982 and located in acid-producing or iron-producing coal seams, surface entries and accesses shall be located in such a manner as to prevent any gravity discharge from the mine.