(1) Mining must be conducted to control the effects of drainage from pits, cuts, and other mining activities and disturbances. The permittee shall prevent or control discharge of acid, toxic, or otherwise harmful mine drainage waters into ground water flow systems so that adverse impacts on ground water flow systems and on approved postmining land uses are prevented.

(2) Backfilled materials must be placed to minimize adverse effects on ground water flow and quality, to minimize off-site effects, and to support the approved postmining land use. The permittee is responsible for performing monitoring according to ARM 17.24.645 to ensure that operations conform to this requirement.