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• Ib/ft'. Second is a colluvial soil along the upper portions of the road and the mine site <br />that is the result of landslides from strata above the road. This soil is a highly cohesive <br />clay, 1,300 PSF; with a relatively low angle of internal friction, 15° ; and a higher density <br />of 130 Ib/ft3. <br />During construction of the existing road, the soil in the areas to be cut was used <br />to fill the drainages to create the road and mixing the soils. During reclamation of the <br />mine road, the blended soils will be excavated from the drainages and placed in the fill <br />sections, again mixing the soil types. The engineering characteristics of the blended soil <br />will not be identical to the two "pure" soils. These calculations assume that the <br />dominant soil in each area will have the highest influence upon the strength of the <br />reclamation backfill; therefore, the characteristics of the dominant soil in each area are <br />generally used for the stability calculations. The exception is in the upper portion of the <br />road where the dominant soil is very high in cohesion and could give an elevated factor <br />of safety. For stability analysis of these areas, backfill with a soil of lower cohesion is <br />used in the calculations to introduce an additional factor of safety into the analysis. <br />• The steepest slope along the road alignment is at the first hill up from the existing <br />second gate, Station 18+00. Across section of this area; as well as, two other areas on <br />the upper portion of the road, Stations 42+00 and 47+00 are shown on Figure 3.1-8. <br />The stability analysis was performed using a program developed at the <br />University of Kentucky called REAME. The program allows the user to create a data set <br />to define the soil horizons and rock layers. The soil parameters, conditions of failure <br />and trial centers are defined. REAME then calculates the lowest factor of safety for the <br />data set, working from the trial center to the location of the lowest factor of safety .The <br />reports generated by REAME were edited to fit on one page each and are contained in <br />Table 3.9-4. <br />Permit Renewal 3-9 08/03 <br />