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- 2018 Biological Resources Inventory Report <br /> Table 3: <br /> Federally Listed Species Known to Occur in Adams County,Colorado <br /> Common Name Scierifk:Names Status2 Likelihood of Occurrence In Project aramHabitat Suftability3 <br /> Fishes <br /> Pallid Sturgeon3 Scaphirhynchus FE Not present in Colorado.This species is documented to occur <br /> albus downstream in the Platte River in Nebraska.The Project does not <br /> anticipate causing any water depletions to the South Platte River.Pallid <br /> sturgeon are a bottom-oriented,large river obligate fish inhabiting the <br /> systems of the Missouri and Mississippi rivers.No critical habitat has <br /> been designated for the pallid sturgeon in the Project area. <br /> Mammals <br /> Preble's Meadow Zapus hudsonius FT Unlikely to occur.Project is located in the USFWS Preble's Meadow <br /> Jumping Mouse preblei Jumping Mouse Block Clearance Zone.4 <br /> Plants <br /> Colorado Butterfly Plants Oenothera FT Unlikely to occur.The Colorado butterfly plant(COBP)is known to occur <br /> coloradensis spp. in Adams County;however,COBP was not observed in the Project area <br /> coloradensis during the site visit and potential COBP habitat does not exist in the <br /> Project area.COBP is an early successional plant(although probably not <br /> a pioneer)adapted to use sub-irrigated alluvial stream channel sites and <br /> floodplains surrounded by mixed grass prairie that are periodically <br /> disturbed.COBP occurs at elevations of 5,000-6,400 feet,which is <br /> slightly higher than the elevation range of the Project area.The habitat at <br /> the South Platte River Creek has dense vegetation cover with at least <br /> partial canopy coverage by shrubs and trees,which is not suitable habitat <br /> for COBP.No designated critical habitat for COBP exists in the Project <br /> area.The Project is not expected to impact the South Platte River or <br /> associated wetlands. <br /> Ute Ladies'-tresses Spiranthes diluvialis FT Unlikely to occur.Suitable habitat likely does exist for Ute ladies'-tresses <br /> orchid' orchid(ULTO),however the species is not known to occur in Adams <br /> County.Suitable habitat includes perennial stream terraces,floodplains, <br /> and oxbows at elevations between 4,300-7,000 feet.Recent surveys <br /> since 1992 have expanded the number of vegetation and hydrology types <br /> occupied by ULTO to include seasonally flooded river terraces, <br /> subirrigated or spring-fed abandoned stream channels and valleys,and <br /> lakeshores.Twenty-six populations have been discovered along irrigation <br /> canals,berms,levees,irrigated meadows,excavated gravel pits,roadside <br /> barrow pits,reservoirs,and other human-modified wetlands.The habitats <br /> at the crossings of the South Platte River have dense vegetation cover <br /> with at least partial canopy coverage.No critical habitat designated for <br /> ULTO exists in the Project area. <br /> Western Prairie Fringed Platanthera FT Not present.Western prairie fringed orchid is a perennial orchid of the <br /> Orchid' praeclara North American tall grass prairie and is found most often on unplowed <br /> calcareous prairies and sedge meadows.This species is dependent on <br /> mycorrhizal fungi,and its persistence is dependent on periodic <br /> disturbance by fire,mowing,or grazing.The species occurs in Iowa, <br /> Kansas,Minnesota,Missouri,Nebraska,North Dakota,and Oklahoma. <br /> Upstream depletions to the Platte River system in Colorado and Wyoming <br /> may affect the species in Nebraska.No critical habitat is designated for <br /> the orchid in the Project area. <br /> 1 Source:Ackerfield(2015) <br /> 2 FE=Federal Endangered,FT=Federal Threatened <br /> 3 USFWS(2017a) <br /> Tucson South Sand and Gravel Mine—Brighton,Colorado 9 <br />