Maryland Code, Land Use § 9-804

(1) an asphalt plant;

(2) a concrete plant;

(3) sand and gravel washing, crushing, or screening; or

(4) surface mining.

(b)(1) Notwithstanding Title 4, Subtitle 3 of this article, the county commissioners may hear and decide a special exception under an appeal filed by a property owner who is aggrieved by a decision of the board of appeals on the special exception.

(2) The county commissioners shall hear and decide an appeal of a special exception in accordance with rules and procedures adopted by the county commissioners.