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HIJU'jc- _4 lUlh ILI;1LI1 UI L � i <br />NELSON-COUVRE77E&ASSOC`SV 2064612510 P.04 <br />0 <br />4' <br />TYPICAL CROSS SECTION <br />2' MIN. <br />ROCK SPALLS <br />ORIGINAL SURFACE <br />r <br />PERFORATED DRAIN PIPE <br />BACKFILL SHOULD BE COMPACTED TO 90% <br />OF THE MAXIMUM PRY DENSITY (ASTM D 1557) <br />NEL ON•COUVRETTE & ASSOCIATES, INC. <br />�OWE/RTMO GEOTECNNICAL ENOI ERE, GEOLDOISYS <br />AND EK MONWN/AL OMN71E7E <br />TREDWAY <br />FILE NO. 132194 <br />3 <br />DATE AUGUST 1994 <br />