This trench detail specifies a three-foot deep excavation with a one-foot width at finish grade. A PVC main line rests on a two-inch pipe bedding layer, with a bundle of control wires positioned underneath separated by one inch of bedding material. The installation includes a tracer wire near finish grade and is backfilled with approved excavated material. Per project notes, wires are taped according to specifications but are left untaped from the main line.
FINISH GRADE TRACER WIRE BACKFILL W/ APPROVED EXCAVATED MATERIAL PVC MAIN LINE PIPE BEDDING BUNDLE CONTROL WIRES UNDER MAIN LINE WITH 1" PIPE BEDDING BETWEEN PIPE AND WIRES NOTE: TAPE WIRES PER SPEC BUT DO NOT TAPE BUNDLED WIRES TO MAIN LINE 1' 3' 6" 2"
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