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2018 Biological Resources Inventory Report <br /> • USFWS Region 6 Information for Planning and Conservation (IPaC) search results for federal and <br /> state listed threatened and endangered species likely to occur near the Project area (Attachment 2) <br /> • USFWS Critical Habitat Map Service(USFWS 2017a) <br /> • CPW Bald Eagle Shapefile (CPW 2016a) <br /> • CPW threatened, endangered and species of concern for the state(CPW 2017) <br /> • CPW Species Profiles (CPW 2016c). <br /> • CPW Species Activity Data(CPW 2016b). <br /> • Colorado Natural Heritage Program (CNHP) Database—CNHP maintains species profiles for <br /> protected species that can be used to identify species of concern within a Project area(CNHP 2015a, <br /> 2015b) <br /> • U.S. Department of Agriculture(USDA) Farm Service National Agricultural Imagery Program Aerial <br /> photography for Project location (USDA 2015) <br /> • Natural Resource Conservation Service(NRCS) Soil Survey Geographic (SSURGO) Database. <br /> Shapefile.Accessed July 8, 2017.Available online: http://sdmdataaccess.nres.usda.gov/. (NRCS <br /> 2017) <br /> • Multi Resolution Land Characteristics Consortium National Land Cover Dataset Compilation (NLCD) <br /> (Fry et al. 2011) <br /> • Hammerson, G.A. 1999. Amphibians and Reptiles in Colorado. Second Edition, 2nd Edition. <br /> University Press of Colorado(Niwot, Colorado) and Colorado Division of Wildlife <br /> • Sibley, David Allen. 2014. Sibley Guide to Birds. Second Edition. Knopf Publishing Group <br /> 2.1.2 Field Survey Methods <br /> Two biologists qualified to identify Great Plains flora, fauna, and noxious weeds conducted the field effort. <br /> The following subsections provide descriptions of survey methods used for each component of the field <br /> surrey by the field team. <br /> 2.1.2.1 Listed Species—Habitat Suitability Assessment <br /> Field notes and digital photography were collected from within the Project area that presented suitable <br /> habitat characteristics that would support any species listed in Tables 3 and 4. <br /> 2.1.2.2 General Wildlife and Vegetation Assessment <br /> Tetra Tech biologists performed a field survey to document habitat types in the Project area. All species <br /> of wildlife and vegetation that were observed during the survey were recorded in a field logbook and <br /> photographed as practicable. Locations of certain resources, such as potential black-tailed prairie dog <br /> colonies in the Project area,were mapped using a generic GPS software loaded on the field tablet <br /> computer. <br /> 2.1.2.3 Avian Survey Methods <br /> Tetra Tech biologists surveyed the Project area for raptor nests and trees that could support raptor nests. <br /> The largest buffer for active raptor nests recommended by CPW is 0.5 mile for the Bald Eagle, so only <br /> trees within 0.5 mile buffer of the Project area were surveyed for nests. The raptor nest survey was <br /> completed during full leaf-out of deciduous trees in the Project area, so trees with the potential to support <br /> nests were observed with field binoculars to search for nests to the greatest extent possible. CPW defines <br /> 6 Tucson South Sand and Gravel Mine—Brighton,Colorado <br />