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_~ <br />- construction materials ate identified on Figure 9 for limiting <br />the area of disturbance and to provide the most effective <br />y utilization and deposition of materials. <br />5.5 <br />Because of the severe instability of the slope and the conditions <br />created by excavating the toe area, thereby increasing the <br />instability and increasing the likelihood of slope failure, a <br />staged construction methodology will be required. Staged <br />_ construction will utilize small excavated areas with mud-wave <br />techniques to establish initial fill areas. Excavations of the <br />toe area should be limited to a maximum of 20 feet wide (parallel <br />to bench) bottom area unless site conditions allow for wider <br />areas without causing slope failures. Successive sections will <br />be excavated, then backfilled to minimize the total excavated <br />- area exposed at any time. <br />5.6 INSTAi_•L•ATION Q$ DRAIN <br />Following completion of the staged toe construction, drain <br />material will be placed in a grid pattern within the toe area and <br />extended beyond the limits of the proposed rock toe berm. The <br />drain material will be placed within specified areas and wrapped <br />with filter fabric. <br />Once the drain is installed in the bottom portions of the <br />slope and extended beyond the limits of the proposed rock toe, <br />fill operations will be performed to a specified height and <br />slope. During the fill operations, the drain will be extended up <br />24 <br />