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2.2 Substation The new Potato Lake substation will be a fenced-in area of 96 feet by 146 feet on a 3.2 acre parcel located in section 21 of Arago Township, along U.S. Highway 71. Itasca-Mantrap has purchased 3.2 acres of the land and will own all common facilities (land, fence, etc.) (See Figure 1). 2.3 Structures & Conductors The Permittee will use single-pole, direct-embedded wood structures, or similar. The poles average 65 to 80 feet in height with spans of 300 to 400 feeta tween poles. Horizontal post insulators will be used unless design requires longer spans,. yo • the capability of the insulators, in which case a braced post design will be uti -• ;; .cc. modate the increased loadings. Single-pole with underbuild design will be use• - «r wh the new transmission line will utilize the existing right-of-way of Itasca- wrap stri on lines along U.S. Highway 71 and 230th Street(Northern Pine Road) and i u. -w 12.5 kV distribution lines on the new 115 kV structures that follow along 230th Street(No rn Pine Road) and 141st Avenue up to the ' intersection with County Highway : Why atructures are tacked"with a 115kV above a 12.5 kV the higher total voltage wilg .o es height 85 feet with span length of 250 to 300 feet. '' The Applicant will develop stra es in an Avian ;tiga 'on P that will be implemented to avoid or minimize impacts to bir. or their habitats at the �. . o River crossing and other public waters along the r te,pursuanttb Section 5.1 of this Permit. The Avian Mitigation Plan will be submitted to t o issi n with the P '. d Profile for the Project. The three phases th 5kV transmi A.'on lin.. 9 ill each consist of one single 26/7 kcmil 477 steel-reinforced alu um conductor. ' One shield wire will be strung above the conductors to prevent damage from lightning strikes. These shield wires are typically less than one inch in diameter and include fiber optic cables, which allow a path for substation protection equipment to communicate with equipment at other 1 terminals on the transmission line. 1 1 November 2010 Page l 5 I