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`- Alternative 2, Option A (Preferred Alternative) and Option B .....................................56 <br />Threatened and Endangered Species .............................................................................56 <br />.; . <br />i Sigmfcant Adverse Impacts ...................................................................................................58 <br />Impacts Common to Alternatives 1 and 2 .......................:.............................................58 <br />Alternative 1, Options A and B .....................................................................................59 <br />i. Alternative 2, Option A (Preferred Alternative) and Option B .....................................59 <br />~' No-Action Alternative ..............................................................................................:....59 <br />Potential Mitigation Measures ................................................................................................60 <br />'' . Significant Unavoidable Adverse Impacts .............................................................................61 <br />Historic and Cultural Resources ....................................: <br />...............................................................63 <br />Affected Environment ............................................................................................................64 <br />Early History of Sprmgfield ..........................................................................................65 <br />Early History of Eugene ............................................................................:...................65 <br />Site History ...................................................................................................................66 <br />Historic Properties .........................................................................................................67 <br />Archaeological Resources .............................................................................................69 <br />•'! Significant Adverse Impacts .........................................:.........................................................70 <br />Alternative 1 Option A <br />.................................................................................................70 <br />Alternative 1, Option B .................................................................................................71 <br />Alternative 2, Option A (Preferred Alternative) and B .................................................71 <br />No-Action Alternative ...................................................................................................72 <br />Potential Mitigation Measures ................................................................................................72 <br />Alternative 1, Option A .................................................................................................73 <br />Alternative 1, Option B <br />.................................................................................................73 <br />Alternative 2, Option A (Preferred Alternative) and B .................................................73 <br />Significant Unavoidable Adverse Impacts .............................................................................74 <br />Aesthetics .......................................................................................................................................75 <br />Affected Environment ............................................................................................................75 <br />'.' Alternative 1, Options A and B .....................................................................................75 <br />Alternative 2, Option A (Preferred Alternative) and Option B .....................................75 <br />Significant Adverse Impacts ...................................................................................................76 <br />Alternative 1, Options A and B .....................................................................................76 <br />Alternative 2, Option A (Preferred Alternative) and Option B .....................................82 <br />No-Action Alternative ........................................................................................:..........85 <br />Potential Mitigation Measures ................................................................................................85 <br />Significant Unavoidable Adverse Impacts .............................................................................85 <br />Air Quality .....................................................................................................................................87 <br />Affected Environment ........:...................................................................................:. <br />..............87 <br />Climate ..........................................................................................................................87 <br />Air Pollution and Sources .............................................................................................87 <br />,: <br />Regulations and Standards ............................................................................:...............88 <br />Significant Adverse Impacts .......................................................................:...........................89 <br />Potential Mitigation Measures ................................................................................................91 <br />v <br />