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birds of prey such as Bald eagles and red-tailed hawks are known to be in the area although no nests have <br /> been seen within the permit boundary. <br /> While most of the fauna on and around the mine site are common, some species are considered to be <br /> sensitive species by the US Forest Service. Under the authority of the National Forest Management Act, <br /> the Forest Service Rocky Mountain Region (Region 2)has developed and maintains a list of sensitive <br /> species located within its boundaries. The Rocky Mountain Region Endangered,Threatened, Proposed <br /> and Sensitive Species list(USDA 2013)was reviewed to determine which species or habitats may be <br /> potentially affected. For this analysis,the entire Unit Species List for the GMUG was reviewed and the <br /> following species were determined to be associated with the project area and potentially affected: <br /> Species Scientific Name 71 Habitat(s)Potentially Used <br /> American marten Martes Old growth spruce-fir&lodgepole pine forests w/abunIq <br /> americana and downed trees. <br /> Stream habitat with clear cold water, silt free rocky substrate in <br /> Colorado River Oncorynchus riffle/runs,and areas of slow deep water,well vegetated stream <br /> cutthroat trout clarki pleuriticus banks,abundant stream cover,relatively stable flow and <br /> temperature regimes. <br /> Anaxyrus boreas Damp areas bordering marshes,wet meadows, streams,beaver <br /> Boreal toad boreas ponds,and lakes,interspersed with subalpine coniferous or mixed <br /> forest <br /> 3.1 American Marten <br /> American martens are associated with mature late successional mesic conifer and mixed-conifer forests <br /> containing intermediate canopy closures (between 30%and 70%). Vertical and horizontal structural <br /> diversity, abundant coarse woody debris and snags are important key habitat components. The majority of <br /> documented occurrences on the GMUG forest occur in the spruce-fir cover type with large diameter <br /> downed wood, large diameter standing trees, leaning logs and trees,decayed or overturned stumps, snags <br /> and coarse woody debris in various decay stages, and large rocks,trees or saplings.No martens have been <br /> observed in or around the Revenue Virginius Mine. <br /> 3.2 Colorado River Cutthroat Trout <br /> Colorado River cutthroat trout(CRCT)are generally viewed as a cold-water fish species. In streams <br /> where average temperatures are less than 10 degrees Celsius survival of juveniles can be limited.When <br /> water is too cold juvenile fish will not grow to a sufficient size to survive winter. CRCT are associated <br /> with relatively pristine streams that do not contain excess amount of fine sediment and flow through <br /> healthy and intact riparian areas. Cutthroat trout spawn in the spring when temperatures are above 10 <br /> degrees celsius and flows are high. Spawning habitat can be found in headwater or tributary streams that <br /> are cold, and clear,with loose, clean gravel less than 3.5 inches in diameter. <br /> Revenue Mine Amendment 02 <br /> December 2021 H-2 <br />