Laserfiche WebLink
Refuse Area, sad Cross Sections Al-A1' through J-J' contained in <br />Exhibit D, Disturbed Area Cross Sections. <br />The design of the refuse disposal area presented herein is based <br />upon two designs which were submitted by the previous mine <br />operator sad approved by the Division during the initial permit <br />term. These designs are summarized below. <br />Initial DeaiAn <br />The initial design for the refuse disposal area was submitted as <br />part of the original permit document submitted by Suadance Coal <br />Company in 1982. Thin design, which was approved by the Divi- <br />sioa, incorporated the following design considerations sad coa- <br />atructioa techniques. <br />1. Size and Coniiauratioa: The disposal area covered approxi- <br />mately 18 acres and contemplated a maximum pile height of 14b <br />feet. The design configuration utilized 20-toot wide <br />• terraces which were spaced at 50-foot vertical intervals <br />along the embanlonent elopes. The embanloneat elopes between <br />terraces were designed at 3 horizontal to 1 vertical, result- <br />ing in as overall embanlonent elope of 4 horizontal to 1 <br />vertical. <br />2. Draina¢e: All drainage from undisturbed arena upgrade from <br />the refuse diapoeal site was diverted away lrom the site. <br />All drainage originating on the refuse disposal area was <br />collected utilizing the terraces described above which <br />directed drainage to sediment collection ditches located <br />along the perimeter of the reluae diapoeal area and directing <br />it towards the sedimentation pond located went of the <br />disposal aite_,~Additionally, a rock uaderdrain was installed <br />along the original Starkville Gulch channel beneath the base <br />of the reluae diapoeal area to direct all internal drainage J <br />from the pile to the sediment pond Also, a water monitoring <br />wall was installed at the toe of the refuse embanlvneat <br />462 <br />Revised i/88 <br />