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• north facing slopes, approximately 1/4 mile from the majority of the nesting locations, this effect is <br />expected to be minimal. Those species, such as Coopers hawk (Accioiter coooerii) and sharp-shinned <br />hawk (Accioter striatus), that prefer the mountain shrub community on the north facing slopes for nesting <br />will be forced to adjacent areas where suitable habitat is available. The use of shrub transplants will <br />restore nesting and hunting habitat for these species on revegetated areas. <br />Special care will be exercised when operating in the southeast corner of the permit area. The prairie <br />falcon aerie (Nest Site 38 on Map M25A) lies outside the permit perimeter but within a buffer zone estab- <br />lished by the U.S. Fish Bind Wildlife Service (appendix E, Part I). As requested no surtace activity will be <br />permitted within this areal between March 1 through July 31 each year. Permit term 2003-2007 mine plans <br />indicate that we will not disturb within the buffer zone. Mining disturbance is projected to come no closer <br />than approximately 200 feet from the buffer zone edge. <br />Powerline Construction <br />REA Bulletin 6140, Powerline Contacts by Eacles and Other Larae Birds, describes acceptable powerline <br />construction to protect birds of prey and concerns itself mainly with low voltage powerlines rather than high <br />voltage such as are in sf:rvice at Trapper Mine. Clearance from phase to phase or phase to ground wires <br />is much greater on Trapper's high voltage lines than the minimum acceptable per the Bulletin. No known <br />• powerline contacts have occurred with eagles or other large birds with the present structures. <br />Four different types of structures are in use on the mine property. (Refer to Section 3.8 for additional <br />discussion on powerline structures.) <br />1) The Flat Top Structures have a set of crossarms, 12 feet long, mounted 6 feet below the top of <br />the pole as shovm in Figure 3.8-2. Two of the three phases are run beneath the outer ends of the <br />crossarm while the third phase is run above the crossarm midway between the pole and one end <br />of the crossarm. There is a lightning rod at the top of the pole and an insulated wire runs from this <br />rod to the ground. The rod is mounted on the side of the pole top and thus does not obstruct the <br />pole top as a perch. The ground wire is attached to the side of the pole about 6 inches below the <br />top. On this structure, a bird would likely choose to land on the unobstructed side of the crossarm <br />or on the pole top, and there is no chance of powerline contact in either of these positions. <br />• <br />4-161 <br />fir.,-~ ~;':~0~~' <br />