Minnesota Administrative Rules
Agency 158 - Natural Resources Department
Chapter 6132 - NONFERROUS METALLIC MINERAL MINING
RECLAMATION STANDARDS
Part 6132.2600 - HEAP AND DUMP LEACHING FACILITIES

(1) provide rationale for site selection with regard to characteristics of the site that could affect, or be affected by, the heap and dump leaching facilities;

(2) ensure that only leaching solutions that meet all state and federal water quality standards will be released to the environment;

(3) include means of detecting and retrieving leaching solutions which might be released if leakage occurs;

(4) describe all materials, construction, and operating performance specifications and limitations that must be maintained to ensure protection of other natural resources;

(5) ensure that precipitation events do not result in overtopping ponds;

(6) describe the specific steps that must be taken to neutralize and detoxify residual leaching solutions within leached ore and sediments;

(7) identify monitoring locations to ensure compliance with the design; and

(8) include a schedule for the design engineers to inspect the construction, operation, and reclamation of the facility, including closure and postclosure maintenance, to assure compliance with the design. In the event the design engineers become unable to perform the inspections, the engineers shall be replaced by persons who meet the qualifications of part 6132.2600, subpart 2, item A, and that can demonstrate an understanding of the design and an ability to perform the necessary inspections.