Current through Register Vol. 35, No. 11, June 11, 2024
Section 20.6.7.24 - REQUIREMENTS FOR OPEN PITS Operational requirements.
A permittee operating an open pit shall operate the open pit pursuant to the following requirements, as applicable.
A. The open pit shall remain within the area identified in the discharge permit.B. Stormwater shall be diverted outward and away from the perimeter of the open pit and, to the extent practicable, shall not be directed into the open pit.C. Water generated from within the perimeter of the open pit and pit dewatering activities shall be managed according to a mine operation water management plan. The water management plan shall be submitted to the department for approval in a discharge permit application for a new copper mine facility or in an application for a discharge permit renewal.D. During operation of an open pit, the standards of 20.6.2.3103 NMAC do not apply within the area of open pit hydrologic containment.E. Leach stockpiles, waste rock piles, and other regulated mine units in and surrounding an open pit surface drainage area shall be designed and located to minimize the size of the open pit surface drainage area to the extent practicable.20.6.7.24 NMAC - N, 12/1/13