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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 (Accipiter cooperii) and sharp-shinned <br /> hawk (Accipter 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 39 on Map M25A) lies within the permit perimeter and within a buffer zone estab- <br /> lished by the U.S. Fish and Wildlife Service (appendix E, Part 1). As requested, no surface activity will be <br /> permitted within this area between March 1 through July 31 each year. Permit term 2013-2017 mine plans <br /> indicate that we may disturb within the buffer zone. Mining disturbance is projected to come within the <br /> buffer zone edge and activities will be restricted by the timeframe noted above. <br /> Powerline Construction <br /> REA Bulletin 6140, Powerline Contacts by Eagles and Other Large 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 service 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 shown 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 /> 4-161 <br /> Revision: ! <br /> Approved: <br />