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As shown in Figure 6, RDA Final Configuration, an access road has <br />been cronstructed along the west side of the sedimentation pond. The refuse <br />area will be serviced by access roads constructed on the front slope of <br />benches as they are constructed. <br />The refuse disposal area will be constructed as shown by the <br />conceptual plan and cross sections illustrated in Figure 7, Conceptual Fill <br />Configuration, Figure 8, Generalized Cross Sections, and Figure 9, Benched <br />Keyway Cut. Outslopes will be 2H:1V, benches will drain to rip-rapped side <br />ditches along the contact between the refuse and undisturbed areas. <br />Benches and roads will be sloped so that drainage will be routed to tce <br />areas before draining laterally to the rip-rapped side ditches. Figure 10 <br />shows the final drainage configuration of the pile. All runoff within the <br />basin whether disturbed or undisturbed will enter pond 009 via side <br />crollection ditches. Pond 008 has been sized to accrniodate this runoff. <br />Although this is an ephemeral drianage with no springs or seeps, an <br />underdrain made up to durable rock will be maintained along the existing <br />® drainage for the length of the fill. Temporary diversion ditches will be <br />installed above the rock underdrain to divert runoff away fran drains and <br />** <br />minimize clogging. A benched keyway cut will be constructed as shown on <br />Figure 9, Benched Keyway Cut, in the toe area to stabilize the tce and <br />allow for subdrainage. <br />The refuse disposal area final configuration is shown on Figure 6, <br />RDA Final Configuration and Figure 11, Cross Section A-A' Final <br />Configuration. The overall average slope is about 3.4Hc1V as a result of <br />bec.~hes and haul roads crossing the outslope of the fill. A slope <br />:ts`~ility analysis was ccx~leted based on assumed fill parapeters. hfien ^ <br />representative refuse material is available for testing, additional <br />stability analysis will be conducted and designs modified if appropriate. <br />Construction of the initial refuse disposal area has involved <br />disturbance of approximately 7 acres to acmnodate the sediment pond, <br />access road, refuse belt and storage capacity Eor the first 2 to 3 years of <br />** See Page 2.05-33 (a) 2.05-33 <br />I~vised 5/23/91 <br />