Iron formation and Duluth complex formation materials of varying grades and types shall be segregated within the same stockpile or placed in separate stockpiles. Materials which require different means of beneficiation shall not be commingled.
Minn. R. agency 158, ch. 6130, TACONITE AND IRON ORE RECLAMATION STANDARDS, pt. 6130.2800
Statutory Authority: MS s 93.47