The person conducting the disposal of coal refuse in underground mines shall meet the requirements of Chapter 89 (relating to underground mining of coal and coal preparation facilities).
25 Pa. Code § 90.127
This section cited in 25 Pa. Code § 90.3 (relating to general requirements: permit); and 25 Pa. Code § 90.39 (relating to ponds, impoundments, banks, dams, embankments, piles and fills).