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-• - -- -CUTOFF TRENCH <br /> <br />~- <br /> The cutoff trench will be of a depth determined by the field engineer. <br /> The nature of the design calls fdr a complete cutoff trench, therefore, <br /> the actual depth will depend on when consolidated bedrock rock is en- . <br /> countered plus approximately four feet. The bottom width of the trench <br /> will be a minimum of twenty-feet".- The walls will be sloped-2 to 1. <br /> The cutoff trericn ivilI he backfilIed with the-same material used in the <br /> impermeable core-of the -embankment,. ~ " -" -"- `- " -"~ -' - <br /> The weighted "creep-factoraIong'the cutoff trench = -"2;48. <br /> <br />,~ .. •. <br /> <br />-~ - e - REVISED FEB 13 '~7 <br />