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The main embankment zonation is shown on Figure C-5. The <br />• upgradient face of the embankment will be covered with a filter <br />layer to prevent movement of tailings material into the <br />granular embankment fill. The permeable materials will function <br />to drain the tailings immediately adjacent to the embankment <br />to the subdrainage pipe network at the base of the embankment. <br />The pipe network continues under the main embankment and <br />discharges to a lined collection ditch at the downgradient toe. <br />This system, as discussed in Section D.6.5.3. will route <br />tailings water from the base of main embankment to the lined <br />collection pond. Details of the drainage network are shown on <br />Figure C-6. The drainage layer details are shown on Figure <br />C-5. The downgradient portion of the embankment will be <br />constructed with less pervious materials. <br />Stability of the main embankment is discussed in Section <br />D.6.8. <br />• D.6~.5.4.2 Splatter Embankment <br />A splatter embankment will be constructed concurrently <br />with the main embankment construction. The splatter embankment <br />will be constructed to an elevation of 8,590 with side slopes <br />of 2H:1V. The maximum height of the splatter embankment will <br />be 90 feet. The splatter embankment crest will be 20 feet wide <br />and will serve as an access road. The splatter embankment is <br />shown in plan view on Figure C-3 and in cross-sectional view <br />on figures C-5 and C-7. <br />During Phase 1 operations the splatter embankment will <br />serve to divide the tailings facility into an upper and lower <br />disposal area. As tailings deposition proceeds to Phase 2 <br />operations, the splatter embankment will be buried and tailings <br />deposition will occur in a single disposal area. <br /> <br />D-,3n <br />