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-slope <br />• The waste rock would be pulled back to achieve a 2:1 slope which matches adjacent hill <br />- - <br />aspects. In order to meet BLM's aesthetic goals of `blending' site features into the natural setting <br />- - -__ _ <br />contours, this slope/aspect ratio was applied. The adjacent slope gradients were calculated using <br />surveypoints derived by BCH LLC, These existing slope gradients are as follows; <br />o The slope above the high wall/portal ascents 30' vertical over 45' horizontal; <br />;thereby lending a slope of 1.5:1. <br />o The Face of the waste rock slope contains a slope of 1.3 -1.5:1: <br />(o The natural slope to the North of the Level 6 pad is 1.7:1. <br />?o The `swale' to the North of the pad, adjacent to the waste rock slope is_1.88 1.1 <br />?o The existing Deadman Gulch fault pathway above the Level 6pad is 2.89:1 <br />• The removed waste rock would reach a crest (wide orange line) and blend with the historic <br />underlying contours (dark black lines) (Figures B.4 through &6). <br />The anticipated step-wise progression to accomplish the waste rock removal is as follows; <br />• Removal will likely begin at the southern corner closest to the Deadman Gulch headwaters area. <br />The waste rock will be removed in layers (-2'ft lifts with the use of a trackhoe) to allow for <br />drying/draining of underlying material. <br />• Each layer will be controlled for stormwater construction flows with the use of construction <br />fabric/fencing and waddles where needed (Approximately 1-66-0-ft-of storm- water fence, and a <br />cumulative total of 1.0.00' of waddle material will be required). Removal would occur during the <br />dry season (Fall). <br />• Access roads for the heavy equipment will be cut into the waste rock, but will be very temporary <br />in nature Cestimated to be a total of 2000' feet of temporary road- cut). <br />Waste rock will be placed along the cut portal face in a series of layers, with each layer being <br />compacted into place with the use of heavy equipment ('layers will be approximately 3 feet in <br />depth, 6 feet wide and will take approximately.8.hours'for 3benches,appioximately 100 feet long <br />°using a 2 yd3 bucket_with multiple swings.p- [a potential touil'of 167 benches to be created using <br />one trackhoe; material will bet°d wn by having a ba(khoe or bobcat drive over the newty <br />laced,rlatenal)., <br />The cutwall above and around the portal is on average; 40 foot high (range of 30 to,57, feet at its <br />highest). Giventhe volumeestimate (I 1 0000yds with 16 benches at three foot elevations, it is <br />--- T <br />likely that the entire C'utwall will-be: covered. <br />• The Deadman Gulch containment features will be maintained until the native channel is exposed. <br />Removal of the inlet catchment basin, pipe and outlet features will be the final portions removed <br />once all waste rock is eliminated. <br />• The waste rock will be blended into the contours of the slope. A 1 ft cap of inert alluvium <br />gathered from the Level p3 area will be placed on top of the waste rock. This cap will be <br />10