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Diversion Ditches Flows from the 100 -year, 24 -hour storm event. West <br />Diversion Ditch #2 is designed to flow into the east collection <br />ditch and then into the sediment pond. West Diversion Ditch <br />#1 will be diverted around the piles and will not pass through <br />the sediment pond. <br />Subdrainage System <br />Original - Lateral drains as per the Stability Analysis section <br />of this report and an alternate rock under -drain system as <br />per Rule 4.10.3(5). See page 5 Water Control Measures. <br />West Expansion — No subdrainage system. <br />West and North expansion - The subdrain installed for Gob <br />Pile #2 will be extended as shown on Figure 2. <br />TR -76 - 5 - 11/12 <br />