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Table 2: Transmission Structure Specifications <br />Source: Xcel Energy, June 7, 2011; Xcel Energy, personal communication, October 13, 2011 <br />Environmental Assessment <br />PUC Docket E002/TL-11-223 Page 11 <br />Estimated <br />Structure <br />Span <br />Structure <br />Structure <br />Foundation <br />Base <br />Structure <br />Between <br />Line Type <br />Type <br />Material <br />Location <br />Diameter <br />Diameter <br />Height <br />Structures <br />(feet) <br />(inches) <br />(feet) <br />(feet) <br />Single Pole <br />Galvanized <br />115 kV <br />Vertical <br />Replaces <br />Steel, or <br />36-42 angle <br />300 —500 <br />Single- <br />Configuration <br />Structure <br />5 - 7 <br />70-90 <br />Weathering <br />structures <br />Circuit <br />with Post <br />077 <br />Steel <br />Insulators <br />Galvanized <br />115 kV <br />Single Pole, <br />Replaces <br />Steel, or <br />300-500 <br />Single- <br />Cross Arm Y- <br />Structures <br />6-8 <br />70-90 <br />Weathering <br />36-48 <br />Circuit <br />Frame <br />076 and 078 <br />Steel <br />Galvanized <br />New <br />115/115 kV <br />Single Pole <br />Steel or <br />Structures <br />300-500 <br />Double- <br />6 - 8 <br />36-48 <br />75-115 <br />Davit Arm <br />Weathering <br />076-1 to <br />Circuit <br />Steel <br />076-5 <br />115/115 kV <br />Galvanized <br />Alternate <br />Double - <br />Single Pole <br />Steel or <br />Structures <br />300-500 <br />Circuit with <br />6-8 <br />36-48 <br />75-115 <br />Davit Arm <br />Weathering <br />076-1 & <br />Distribution <br />Steel <br />076-2 <br />Underbuild <br />Source: Xcel Energy, June 7, 2011; Xcel Energy, personal communication, October 13, 2011 <br />Environmental Assessment <br />PUC Docket E002/TL-11-223 Page 11 <br />