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~^ <br />r1 <br />area and 25 degrees or less in the fill area below the bench. <br />r=_ <br />Since these investigations and evaluations were performed, Blue <br />Ribbon Coal Company has elected to keep the mine portal <br />facilities in operation. This decision prompted the Mined Land <br />Reclamation Division to require that the instability of the bench <br />' fill area be corrected. <br />' Blue Ribbon Coal Company retained Rocky Mountain Geotechnical to <br />evaluate current conditions of the site through visual <br />observations and to determine alternatives for stabilization of <br />the mine bench fill area. The alternatives prepared by Rocky <br />Mountain Geotechnical consisted of the following: <br />' o Recompacted soil fill placed at an angle of 25 degrees with <br />excavation and recompaction of the foundation toe area; <br />o Compacted Coal waste with recompacted soil fill utilized in <br />' the lower 20 feet of the slope placed at an angle of 25 <br />degrees with excavation and recompaction of the foundation <br />• toe area; <br />o Coal waste or recompacted soil fill on upper portions of <br />slope, stabilized soil fill on lower portion of slope <br />utilizing soil additives and excavation and recompaction of <br />foundation material at the toe. <br />i' <br />I 1.3.2 Visual Presentation <br />Each of these alternatives were prepared and preliminary costs <br />' ~ were derived and presented to Blue Ribbon Coal Company for <br />evaluations. This information was then presented to the Mined <br />J 3 <br />