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Figure 5 <br />Photo of Typical 115 kV Single Circuit Steel Braced Post Structure <br />Direct embedded galvanized steel or weathering steel poles with davit arms are proposed to be used <br />for the tangent structures if soil conditions warrant. Rock -filled culvert foundations may be required <br />in areas with poor soils. Self-supporting galvanized steel or weathering steel poles with davit arms or <br />braced post on concrete foundations are proposed to be used for long -span, angle, and dead-end <br />structures. <br />The height of single circuit poles will average between 70 and 90 feet and the double circuit <br />structures will average between 75 and 115 feet. The average span for the structures will be <br />approximately 300 to 400 feet, with a maximum span of approximately 500 feet to keep the <br />conductor within existing right-of-way, where applicable. Table 5 summarizes the structure design <br />and foundation for the line. <br />Table 5 <br />Structure Design Summary <br />Orono Project June 7, 2011 <br />MPUC Docket No. E002/TL-11-223 22 <br />Structure <br />Span <br />Right -of- <br />Structure <br />Base <br />Foundation Between <br />Line Type Structure <br />Structure Way Width <br />Height <br />Diameter <br />Diameter Structures <br />Type <br />Material (feet) <br />(feet) <br />(inches) <br />(feet) (feet) <br />Single <br />Single Pole <br />24 to 42: <br />Circuit 115 �, <br />Braced Post <br />tangent <br />kV <br />• Davit <br />Arm <br />Steel <br />•. <br />structures <br />Orono Project June 7, 2011 <br />MPUC Docket No. E002/TL-11-223 22 <br />