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soils, hydrology) required to be classified <br />as a wetland or may differ in size. Given the <br />coarse scale of NWI it is important to note <br />that it provides a general location of potential <br />wetlands but cannot accurately predict how <br />many wetlands or total acres of wetlands could <br />be impacted by any of the alternatives. <br />Also, as presented in Appendix B, Map 2A, <br />WSDOT environmental mitigation sites are <br />located along and within the 1-90 right of way, <br />and will be impacted. <br />Fish Passage <br />The Washington Department of Fish and <br />Wildlife (WDFW) Fish Passage Barrier dataset <br />identifies one mapped partial fish passage <br />barrier within the study area of each <br />alternative. <br />3.4.2 Wildlife Connectivity <br />The study areas encompass a variety of <br />habitats that support fish and wildlife species. <br />Wildlife connectivity is currently fragmented by <br />roadways within the study areas for each of the <br />CHAPTER 3: EXISTING CONDITIONS IN THE STUDY AREA <br />alternatives. The wildlife connectivity criteria <br />assesses if the alternative has the potential to <br />improve the availability of wildlife habitat and <br />connectivity. <br />No existing wildlife fencing occurs within <br />the study areas of Alternatives 1 through 5. <br />WSDOT's Wildlife Crossing Structures dataset <br />includes one wildlife crossing structure that <br />occurs within the study area of Alternatives 1 <br />through 3 near milepost 81 on 1-90 at the Cle <br />Rum River bridge. <br />WSDOT's Habitat Connectivity Investment <br />Priorities dataset maps a 2-mile segment <br />of 1-90 within the study area of Alternatives <br />1 through 3 as low priority for habitat <br />connectivity investment. The remaining 14 <br />miles of Alternatives 1 through 3 are ranked <br />as high priority. Roadways included in <br />Alternatives 4A, 413, and 5 are not ranked. The <br />graphic in Appendix B, Map 4E, illustrates the <br />severity of carcass removal in the study area. <br />The study area for Alternatives 1 through 3 <br />borders or bisects WDFW Priority Habitat and <br />Species areas including the Upper Yakima <br />VOLUME I: FEASIBILITY REPORT 1-90 Corridor— Easton to Cie Elunn Feasibility Study 1 43 <br />