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-4- <br />• 2. Smooth and grade the ground surface to drain towards the toe <br />drain. The existing ponds should be removed as part of the <br />initial construction. <br />3: Construct the toe drainage system. <br />4. After the toe drain is in place, we recommend dozing the exist- <br />ing pile across the area along the north and west perimeter to <br />develop a relatively level surface with a maximum thickness of <br />spoil of 2 feet. This area should be tested to determine the <br />compaction is achieved initially. <br />5. As spoil is developed, the haul trucks should be routed over <br />the pile with a dumping sequence from north to south. The <br />piles should be leveled and compacted on a 3 to 6 month inter- <br />val depending on the area being worked. When the piles of <br />loose material are leveled and compacted, we recommend obtain- <br />ing compaction tests in order to have the data necessary for <br />required periodic certification of the fill. <br />6. The fill should be compacted to at least 90 percent of the <br />maximum density determined using AASHTO T-99. We believe this <br />can be accomplished by using either a loaded dump truck or <br />vibratory compaction equipment. <br />7. Steps 5 and 6 should be continued until the top of the pile <br />reaches elevation 6330. <br />8. Before raising the bank elevation above elevation 6330, the <br />surf ace diversion ditches should be constructed as indicated on <br />the construction plans. <br />9. Steps 5 and 6 can be continued until the design height of the <br />pile is achieved. <br />At all times during construction of the pile, the top of the pile should <br />be sloped at grades less than 1 vertical to 20 horizontal. All low <br />spots in the top of the pile which could trap surface water should be <br />eliminated. <br />~~ <br />