Minn. R. agency 158, ch. 6130, TACONITE AND IRON ORE RECLAMATION STANDARDS, pt. 6130.4000
Mining operations shall be conducted in a manner which will prevent or mitigate hazardous conditions which result from slumping, heaving, and subsidence.
Techniques shall be employed which prevent slumping and heaving.
In the event of actual or likely subsidence the permittee shall establish ground control survey locations and conduct surveys to document the extent of ground movement.
After subsidence has ceased, affected areas shall be contoured or filled to remove hazards and where necessary to protect public health and safety or natural resources, a drainage system shall be established in a manner consistent with part 6130.2200.
Minn. R. agency 158, ch. 6130, TACONITE AND IRON ORE RECLAMATION STANDARDS, pt. 6130.4000
Statutory Authority: MS s 93.47