Electrical · E-BH7ZR

Conduit Trench Detail

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An underground utility trench houses an electrical high voltage duct bank or signal and low voltage duct bank encased in concrete with a sand fill surround. The trench is excavated to a minimum depth of thirty-nine inches below grade, with a warning tape placed in the backfill twenty-four inches below the surface where applicable. Backfill consists of well-tamped earth compacted to ninety-five percent. Surface restoration requires replacing asphaltic concrete paving, existing concrete, or providing grass sod to match the existing area, with saw-cut edges roughened before patching.

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