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NATIVE <br /> COLLUVIAL SOIL Yrr :rry�: <br /> .'%. .'%..%..%.%.%%' <br /> .............................. <br /> ........................................... <br /> ........................................................ <br /> FILTER FABRIC <br /> L:Y.Y.Y C.Y C.r.%.Y.L'Y..Y.YYY. <br /> zirzzi'rz.Yir.'ccr..z.rr.%.Y.ir \ <br /> Yv'r.: v r.'r.:Y: Y. r.: Y: r.'.. <br /> DISCHARGE PIPE <br /> rr..z.Yrr.YYrr \ <br /> BENCH SLOPE AT 30/c <br /> FREE-DRAINING GRAVEL <br /> COLLECTION PIPE WITH <br /> PERFORATIONS AT 4 O'CLOCK <br /> AND 8 O'CLOCK POSITIONS <br /> Shale Bedrock <br /> SEE TEXT FOR ADDITIONAL INFORMATION <br /> NOTES: <br /> 1.THIS IS NOT A DESIGN-LEVEL DRAWING.IT SHOULD BE USED SOLELY FOR <br /> GENERAL INFORMATION PURPOSES ONLY.ACTUAL UNDERDRAIN DESIGN SHOULD ��0��� <br /> BE COMPLETED BY OTHERS. <br /> 2.THE UNDERDRAIN SYSTEM MUST BE TESTED BY THE CONTRACTOR AFTER ENGINEERING OONSULTRINIT'S <br /> INSTALLATION AND BACKFILLING TO VERIFY THAT IT FUNCTIONS PROPERLY. <br /> 3. INCLUSION OF THIS FIGURE IN CONSTRUCTION DOCUMENTS IS DONE SO AT TYPICAL BACK DRAIN DETAIL <br /> THE DOCUMENT PREPARER'S RISK. <br /> 4. REPRODUCTION OF THIS DOCUMENT SHOULD BE IN COLOR. JOB NO.: 18-3046 FIGURE: 20 <br /> (Not to Scale) CADFILE NAME: 3046DRAIN01.DWG <br />