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Topaz Mine Permit Expansion: Threatened, Endangered, and Sensitive Species Evaluation <br />Canyon treefrogs do not occur at the site because of lack of suitable habitat, and the project <br />would not cause any impact to this species. <br />Kachina daisy is not likely to occur at the project site because of lack of suitable habitat, and <br />the project would not cause any impact to this species. <br />Naturita milkvetch may occur at the site, although none were observed during the site <br />rnspection. If the species occurs at the site, there is a slight chance that a few individual plants <br />may be destroyed during construction. However the project would not likely affect regional <br />populations or distribution of the Naturita milkvetch. <br />Noxious weeds are not currently common on the site. A few thistles exist along the existing <br />road. The use of vehicles off-road during construction could encourage the spread of noxious <br />weeds to disturbed sites. If the mitigation measure recommended in Section 6.0 below is <br />followed, the spread of noxious weeds onto BLM-administered lands would be minimized. <br />6.0 MITIGATION MEASURES <br />We recommend the following mitigation measure: <br />1. For a period of 2 years following construction at the expanded site, examine the site for the <br />presence of noxious weeds. If noxious weeds occur, consult with BLM staff and perform weed <br />control measures recommended by BLM. <br />7.0 REFERENCES <br />Andrews, R., and R. Righter. 1992. Colorado birds: A reference to their distribution and <br />habitat. Denver Museum of Natural History, Denver, CO. <br />Colorado Department of Agriculture. 2006. Colorado State Weed List available online at: <br />http://www.ag. state. co. us/csd/weed s/weedhome. html <br />Colorado Division of wildlife (CDOW). 2004. Draft Gunnison sage-grouse rangewide <br />conservation plan. Colorado Division of Wildlife, Denver. <br />Hammerson, G.A. 1999. Amphibians and reptiles in Colorado, second edition. University <br />Press of Colorado, Boulder, and Colorado Division of Wildlife, Denver. <br />Kingery, H.E., Editor. 1998. Colorado breeding bird atlas. Colorado Bird Atlas Partnership and <br />Colorado Division of Wildlife, Denver. <br />U.S. Department of Energy (DOE). 1995. Final environmental assessment for the Uranium <br />Lease Management Program. U.S. Department of Energy, Grand Junction Field Office, <br />Colorado. <br />U.S. Fish and Wildlife Service (USFWS). 1993. Final rule to list the Mexican spotted owl as a <br />threatened species. Federal Register vol. 58, no. 49:14,248-14,271. <br />BIO-Logic Environmental 11 <br />March 27, 2007 <br />