An underground trench detail showing the layout for a live service main and lateral piping positioned below finish grade. The trench requires eight inches minimum of rock-free soil on all sides typically with a twenty inch minimum width. A valve wire conduit or bundle is routed twelve inches minimum away from the conduit. The live service main sits at a lower depth, while lateral piping and conduits are positioned at specified vertical intervals.
6" 6" 1'-0" 2'-0" 20" MIN. FINISH GRADE LATERAL PIPING VALVE WIRE CONDUIT OR BUNDLE AS SPECIFIC 12" MIN AWAY FROM CONDUIT LIVE SERVICE MAIN 8" MIN. ROCK FREE SOIL ON ALL SIDES TYPICAL A 1
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