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Avoiding Underground Utilities during Horizontal ...
Installing underground utility lines safely using horizontal directional drilling (HDD) equipment prevents the drill from hitting and breaking existing underground utility lines (i.e., electrical, water, sewage, gas, steam, chemical). If the drill contacts underground electrical wires, the operator may be electrocuted.
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Underground, Utility, Underground utility, Guidelines for Underground Utility Installations Crossing, Guidelines for Underground Utility Installations Crossing Highway, SECTION 16111D — UNDERGROUND DUCTS, MANHOLES,, SECTION 16111D — UNDERGROUND DUCTS, MANHOLES, HANDHOLES, AND, University of Cincinnati