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Figure 5 <br /> Ready Mixed Concrete Company <br /> Cross Section of Transmission Trench <br /> Area Construction <br /> 2 feet <br /> Minimum Compacted native overburden <br /> 1-foot and clay material <br /> I Geofabric material Mirafi 140N , <br /> or equivalent installed around gravel <br /> II Overburden <br /> I I <br /> Boral #9 <br /> I <br /> gravel material ' <br /> i I Excavated <br /> Trench <br /> I <br /> ——————————— • - ------------- <br /> Maximum of 8-inch Perforated I <br /> 6 inches from 50-slot rigid PVC Pipe <br /> bottom of trench (HDPE Pipe can be considered) <br /> to bottom of I I <br /> pipe _ . . _ . . _ . . _ . . — . . _ . . _ Native <br /> gravel <br />