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FINISH SURFACE SLOPE <br />MINIMUM 3 FT PER LINEAR FOOT <br />OPEN GRADED AGGREGATE* <br />TAPE AND SEAL AT COVER <br />CONCRETE COLLAR <br />PLACED NEAT <br />2.0% MINIMUM <br />A— <br />MINIMUM 4" DIAMETER <br />SOLID OUTLET PIPE <br />SPACED PER SOIL <br />ENGINEER REQUIREMENTS <br />MINIMUM <br />12" COVER <br />*NOTE: AGGREGATE TO MEET FOLLOWING <br />SPECIFICATIONS OR APPROVED EQUAL: <br />SIEVE SIZE PERCENTAGE PASSING <br />1 %" 100 <br />1 " 5-40 <br />Y4" 0-17 <br />DIENT <br />COMPACTED FILL <br />TYPICAL <br />BENCHING <br />f1CTAll A A <br />BACKFILL <br />1Y� <br />MINIMUM <br />s/ 0-7 <br />NOT TO SCALE <br />NO. 200 0-3 <br />J MIRAFI 140N FABRIC OR <br />APPROVED EQUAL <br />�— 4" MINIMUM APPROVED <br />PERFORATED PIPE <br />(PERFORATIONS DOWN) <br />MINIMUM 2% GRADIENT <br />TO OUTLET <br />BENCH INCLINED <br />TOWARD DRAIN <br />TEMPORARY FILL LEVEL <br />MINIMUM 4" DIAMETER APPROVED <br />SOLID OUTLET PIPE <br />BACKDRAIN DETAIL (GEOFRABIC) <br />STANDARD SPECIFICATIONS FOR GRADING <br />Page 23 of 26 <br />