Illinois Administrative Code › Title 62 - MINING › Part 1817 - PERMANENT PROGRAM PERFORMANCE STANDARDS - UNDERGROUND MINING OPERATIONS › Section 1817.121 - Subsidence Control

Current through Register Vol. 48, No. 28, July 12, 2024
a) Measures to
			 prevent or minimize damage.
1) The permittee
			 shall either adopt measures consistent with known technology which prevent
			 subsidence from causing material damage to the extent technologically and
			 economically feasible, maximize mine stability, and maintain the value and
			 reasonably foreseeable use of surface lands; or adopt mining technology that
			 provides for planned subsidence in a predictable and controlled
			 manner.
2) Based on the
			 requirements of 62 Ill. Adm. Code
			 1784.20(b)(7) and
			 (b)(8), the permittee shall perform a survey
			 of the condition of all structures and facilities that may be materially
			 damaged or for which the reasonably foreseeable use may be diminished by
			 subsidence, as well as a survey of the quantity and quality of all drinking,
			 domestic, and residential water supplies within the permit area, subsidence
			 shadow area, and adjacent area that could be contaminated, diminished, or
			 interrupted by subsidence. The applicant must pay for any technical assessment
			 or engineering evaluation used to determine the pre-mining condition or value
			 of such structures and facilities and the quantity and quality of drinking,
			 domestic, or residential water supplies. The applicant must provide copies of
			 the survey and any technical assessment or engineering evaluation to the
			 property owner.
A) The condition survey of
			 structures and facilities shall be performed or scheduled to be performed a
			 minimum of 120 days prior to undermining. A lesser time may be approved by the
			 Department if justified by the permittee in writing. The permittee shall
			 provide a copy of the condition survey to the property owner and maintain a
			 copy to be provided to the Department upon request. The permittee shall provide
			 the Department with verification that the survey has been completed and
			 forwarded to the property owner.
B)
			 The survey of drinking, domestic and residential water supplies shall be
			 completed and submitted 120 days prior to the water delivery system being
			 undermined. A lesser time may be approved by the Department if justified by the
			 permittee in writing. The permittee must provide a copy of the water survey to
			 the property owner and to the Department.
3) If a permittee employs mining technology
			 that provides for planned subsidence in a predictable and controlled manner,
			 the permittee must take necessary and prudent measures, consistent with the
			 mining method employed, to minimize material damage to the extent
			 technologically and economically feasible to structures and facilities, except
			 that measures required to minimize material damage to such structures are not
			 required if:
A) The permittee has the written
			 consent of their owners; or
B)
			 Unless the anticipated damage would constitute a threat to health or safety,
			 the costs of such measures exceed the anticipated costs of repair.
4) Nothing in this Part prohibits
			 the standard method of room-and-pillar mining.