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~:~ <br />concave lower segment. The transition from the low gradient mid-segment to the <br />concave lower segment is abrupt, and the upper section of the lower segment is <br />very steep. This abrupt transition is more pronounced on the revised PMT profile <br />(approximately 6.7% to 33.2°k). The low gradient segment on the revised PMT <br />profile extends from approximately 600 to approximately 500 feet, but the actual <br />grade is not listed on the profile. Due primarily to the abrupt slope transition <br />described, the revised PMT profile does not appear to comply with the geomorphic <br />design specifications of page 10, or the regulatory requirements of 4.05.4(4). Please, <br />amend the Exhibit to conform with applicable geomorphic criteria of 4.05.4(4) and <br />design specifications listed on narrative page 10. <br />006-S 1 <br />18. Pre-mine profile was not provided. The currently approved plan did not include a <br />designed drainage channel for this reclaimed drainage. The profile provided ih the <br />revision exhibits a convex shape, with two apparently abrupt slope transitioris at <br />360 (1.5%:9.4%),and 260 (9.4%:15.2°k). The steepest slope segment is near the <br />lower end of the profile. For these reasons; the profile does not appear to comply <br />with the geomorphic design specifications of page 10, or the requirements of Rule <br />4.04.4(4). Please amend the Exhibit to conform with applicable geomorphic criteria <br />of 4,05.4(4) and design specifications listed on narrative page 10. <br />