J.E. Stover & Associates, Inc
<br />December 5, 2007
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<br />montane shrublands interspersed with pinyon - juniper woodlands. The north half of the main permit
<br />boundary area features stands of aspen interspersed with mixed montane shrublands and a few
<br />isolated conifer (Douglas -fir) stringers. A few small irrigated meadows and patches of sagebrush
<br />shrublands are also present in the high country, as well as several springs, ponds, and seasonal
<br />drainages. Stretches of East Roatcap Creek and Stevens Gulch and their narrow riparian corridors
<br />traverse the mine permit area from north to south (Figure 2).
<br />Impact Evaluations
<br />The following is an impact evaluation for five species potentially occurring within the mine permit
<br />boundary (bald eagle, western yellow - billed cuckoo, Canada lynx, northern river otter, and boreal
<br />toad) and four endangered fish species whose downstream critical habitat is affected by water
<br />depletions in the North Fork River drainage (bonytail, humpback chub, razorback sucker, and
<br />Colorado pikeminnow). Other species listed in Table 1 but not evaluated here were eliminated
<br />based on lack of suitable habitat within the mine permit boundary or because their known ranges
<br />are documented to lie well outside the mine boundary or its immediate vicinity.
<br />Bald eacle
<br />The bald eagle was listed as endangered in the conterminous U.S. by USFWS in 1967. Loss of
<br />habitat, shooting for feathers, and widespread use of the pesticide DDT are all thought to have
<br />contributed to the decline of this species; only 417 pairs were surveyed in the conterminous U.S. in
<br />1963, down from several hundred thousand before the arrival of Europeans on this continent.
<br />Since domestic use of DDT was banned in 1972, bald eagle populations have increased
<br />dramatically, nearly doubling every 8 years. Approximately 6,500 pairs of bald eagles were
<br />recorded in the conterminous U.S. in 2000. In 2001, 45 resident pairs were recorded in Colorado,
<br />up from 11 pairs in 1990. The bald eagle was down - listed to threatened in 1995 at Federal
<br />Register 60(133):35999- 36010. On July 9, 2007, the USFWS de- listed the bald eagle at Federal
<br />Register 72(130):37345- 37346, indicating that the species is considered recovered. No critical
<br />habitat was designated for bald eagles. This inventory considers impacts to bald eagle because the
<br />USFWS will continue to monitor the recovery of the bald eagle for a minimum of five years from the
<br />date of de- listing.
<br />Bald eagles prefer coastal areas, rivers, or lakeshores with tall diurnal perches. In Colorado, bald
<br />eagles are rare summer breeders and common winter residents primarily in mountain parks and
<br />western river valleys. During the night, wintering bald eagles roost in tall trees, or occasionally,
<br />cliffs, up to 20 miles from foraging areas .13 Bald eagles may select night roosts that offer
<br />protection from winter winds and where thermoclines provide warmer temperatures than foraging
<br />areas. 13,12 In daytime, eagles make foraging flights from night roosts, alighting on the ground to
<br />capture prey or feed on carrion and frequently resting in tall trees or, less commonly, on manmade
<br />structures. Fidelity to night roosts is low.
<br />10 USFWS. 2006. Population data for the bald eagle. Available at hftp: / /midwest.fws.gov /eagle /. Accessed March 3.
<br />11 Andrews, R. and R. Righter. 1992. Colorado Birds. Denver: Denver Museum of Natural History. 442 pp.
<br />12 Buehler, D. A. 2000. Bald Eagle (Haliaeetus leucocephalus). In The Birds of North America, No. 506 (A. Poole and F. Gill, eds.). The
<br />Academy of Natural Sciences, Philadelphia, and the American Ornithologists' Union, Washington, D.C.
<br />13 Moynahan, Brendan (BLM Grand Junction Field Office Wildlife Biologist). 2006. Personal communication with Dawn Reeder (Rare
<br />Earth Science, LLC), March 8. 0
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