Appropriate sediment control measures shall be designed, constructed, and maintained using the best technology currently available to: Prevent, to the extent possible, additional contributions of sediment to streamflow or to runoff outside the permit area; Meet the more stringent of applicable State or federal effluent limitations; and Minimize erosion to the extent possible. Sediment control measures include practices carried out within and adjacent to the disturbed area. Sediment control methods include but are not limited to: Disturbing the smallest practicable area at any one time during the mining operation through progressive backfilling, grading, and prompt revegetation; Diverting runoff away from disturbed areas; Diverting runoff using protected channels or pipes through disturbed areas so as not to cause additional erosion; Using straw dikes, riprap, check dams, mulches, vegetative sediment filters, and other measures that reduce overland flow velocity, reduce runoff volume, or trap sediment; Treating with chemicals.