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• Section 816.45(a) Continued. <br />(3) minimize erosion to the extent possible. <br />Sediment control measures designed to meet the most stringent of <br />applicable State or Federal effluent limitations are shown on Map <br />16a, Kerr Mine Area Surface Water Hydrology. These facilities <br />consist primarily of riprap channels, contour furrows, mulches, straw <br />dikes, diversion ditches, and sedimentation ponds. These facilities <br />have been designed using the best technology currently available. <br />Such measures shall be constructed and maintained to minimize erosion <br />and to prevent, to the extent possible, increased contribution of <br />sediment to streamflow. A thorough discussion of sediment and <br />drainage control is presented in Section 780.21. Designs of <br />sedimentation ponds are presented in Exhibit 42, Drainage and <br />Sediment Control Plan. The most stringent standards required of Kerr <br />coal are found in Exhibit 33, NPDES Permit. <br />(b) Sediment control measures include p"ractices carried out within and <br />adjacent to the disturbed area. The sedimentation storage capacity of <br />practices in and downstream from the disturbed area shall reflect the <br />degree to which successful mining and reclamation techniques are applied <br />to reduce erosion and control sediment. Sediment control measures consist <br />of the utilization of proper mining and reclamation methods and sediment <br />control practices, singly or in combination. Sediment control methods <br />include but are not limited to-- <br />(1) Disturbing the smallest practicable area at any one time during .the <br />mining operation through progressive backfilling, grading, and prompt <br />revegetation as required in Section 816.11 (b); <br />(2) Stabilizing the backfill material to promote a reduction in the rate <br />and volume of runoff, in accordance with the requirements of Section <br />816.101; <br />816-45R Revised - January, 1991 <br />