This landscape detail shows the relationship between a tree dripline, root protection zone, and a utility trench. A six-inch shredded mulch layer covers the existing grade. The utility trench is backfilled per specifications, with the edge of the trench closest to the trunk positioned at a minimum of twelve inches outside the limit of the root protection zone. Trench depth varies based on utility requirements.
DRIPLINE RPZ UTILITY BACKFILL PER SPEC TRENCH DEPTH VARIES 6" SHREDDED MULCH LAYER EXISTING GRADE EDGE OF TRENCH CLOSEST TO TRUNK AT 12" MIN. OFF LIMIT OF RPZ
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