Tree root protection zone boundaries including fifty percent and one hundred percent root protection zones relative to the tree canopy drip line. Utility runs are positioned with a specified minimum distance dimensioned from the root protection zone. Utility trenching near the tree is restricted to manual excavation or air spade methods only per project specifications.
DRIP LINE DIM. FROM RPZ; REF. SPEC. (12" MIN.) PLAN TREE CANOPY DRIP LINE RPZ 50% RPZ 100% RPZ UTILITY TRENCH FOR UTILITY BY HAND OR AIR SPADE ONLY
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