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FRONT VIEW <br />SIDE VIEW <br />ALL BACKFILL SHOULD BE COMPACTED <br />IN CONFORMANCE WITH PROJECT <br />SPECIFICATIONS. COMPACTION EFFORT <br />SHOULD NOT DAMAGE STRUCTURE <br />24" <br />6" <br />_v• <br />•p . <br />v' <br />CONCRETE <br />HEADWALL 4" <br />24" Min. <br />NOTE: HEADWALL SHOULD OUTLET AT TOE OF SLOPE <br />OR INTO CONTROLLED SURFACE DRAINAGE DEVICE <br />ALL DISCHARGE SHOULD BE CONTROLLED <br />THIS DETAIL IS A MINIMUM DESIGN AND MAY BE <br />MODIFIED DEPENDING UPON ENCOUNTERED <br />CONDITIONS AND LOCAL REQUIREMENTS <br />NOT TO SCALE <br />TYPICAL SUBDRAIN OUTLET HEADWALL DETAIL <br />I STANDARD SPECIFICATIONS FOR GRADING I <br />Page 17 of 26 <br />24" Min. <br />SUBDRAIN OUTLET <br />PIPE (MINIMUM 4" DIAMETER) <br />12" <br />SIDE VIEW <br />ALL BACKFILL SHOULD BE COMPACTED <br />IN CONFORMANCE WITH PROJECT <br />SPECIFICATIONS. COMPACTION EFFORT <br />SHOULD NOT DAMAGE STRUCTURE <br />24" <br />6" <br />_v• <br />•p . <br />v' <br />CONCRETE <br />HEADWALL 4" <br />24" Min. <br />NOTE: HEADWALL SHOULD OUTLET AT TOE OF SLOPE <br />OR INTO CONTROLLED SURFACE DRAINAGE DEVICE <br />ALL DISCHARGE SHOULD BE CONTROLLED <br />THIS DETAIL IS A MINIMUM DESIGN AND MAY BE <br />MODIFIED DEPENDING UPON ENCOUNTERED <br />CONDITIONS AND LOCAL REQUIREMENTS <br />NOT TO SCALE <br />TYPICAL SUBDRAIN OUTLET HEADWALL DETAIL <br />I STANDARD SPECIFICATIONS FOR GRADING I <br />Page 17 of 26 <br />