(a) Underground mining activities shall not be conducted beneath or adjacent to any perennial stream, or impoundment having a storage volume of 20 acre-feet or more, unless the Commission, on the basis of detailed subsurface information, determines that subsidence will not cause material damage to streams, water bodies and associated structures. If subsidence causes material damage, then measures will be taken to the extent technologically and economically feasible to correct the damage and to prevent additional subsidence from occurring.
(b) Underground mining activities beneath any aquifer that serves as a significant source of water supply to any public water system shall be conducted so as to avoid disruption of the aquifer and consequent exchange of ground water between the aquifer and other strata. The Commission may prohibit mining in the vicinity of the aquifer or may limit the percentage of coal extraction to protect the aquifer and water supply.
(c) Underground mining activities shall not be conducted beneath or in close proximity to any public buildings including, but not limited to, churches, schools, hospitals, courthouses and government offices, unless the Commission, on the basis of detailed subsurface information, determines that subsidence from those activities will not cause material damage to these structures, and specifically authorizes the mining activities.
(d) The Commission shall suspend underground coal mining under urbanized areas, cities, towns, and communities, and adjacent to industrial or commercial buildings, major impoundments or permanent streams, if imminent danger is found to inhabitants of the urbanized areas, cities, towns, or communities.
(e) If subsidence causes material damage to any of the features or facilities covered by this section, the Commission may suspend mining under or adjacent to such features or facilities until the subsidence control plan is modified to ensure prevention of further material damage to such features or facilities.

Source Note: The provisions of this §12.565 adopted to be effective April 7, 1997, 22 TexReg 3093.