I-10 Twin Peaks Traffic Interchange, Environmental Assessment

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Draft Environmental Assessment October 2005 Proposed Intersection Improvements.................................................................... 3-17 Proposed Lighting Improvements......................................................................... 3-20 Proposed Bicycle and Pedestrian Facilities .......................................................... 3-20 Proposed Drainage Improvements........................................................................ 3-22 Proposed Santa Cruz River Channel Modifications ............................................. 3-25 CHAPTER 4: AFFECTED ENVIRONMENT AND ENVIRONMENTAL IMPACTS.........................................................................4-1 Land Use ..........................................................................................................................4-1 Land Resources................................................................................................................ 4-4 Topography.............................................................................................................4-4 Soils.........................................................................................................................4-5 Geologic Setting and Mineral Resources................................................................ 4-6 Agriculture .............................................................................................................. 4-8 Water Resources ..............................................................................................................4-9 Surface Water.......................................................................................................... 4-9 Ground Water........................................................................................................ 4-13 Water Quality.................................................................................................................4-14 Floodplains............................................................................................................4-14 Section 404/401 of Clean Water Act .................................................................... 4-19 NPDES/AZPDES/SWPPP....................................................................................4-21 Sole Source Aquifer.............................................................................................. 4-22 Biological Resources ..................................................................................................... 4-25 Wildlife ................................................................................................................. 4-25 Threatened/Endangered Wildlife Species.............................................................4-26 Arizona Species of Concern.................................................................................. 4-33 Plants..................................................................................................................... 4-34 Threatened/Endangered Plant Species.................................................................. 4-34 Arizona Native Plant Law Species .......................................................................4-35 Vegetation, Riparian Habitat, and Wetlands......................................................... 4-36 Invasive Species.................................................................................................... 4-40 Visual Resources............................................................................................................ 4-41 Air Quality .....................................................................................................................4-45 Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista ii Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
Draft Environmental Assessment October 2005 Noise ............................................................................................................................4-49 Hazardous Materials ...................................................................................................... 4-63 Cultural Resources......................................................................................................... 4-66 Socioeconomics .............................................................................................................4-77 Demographics .......................................................................................................4-77 Minority Groups/Title VI/Environmental Justice................................................. 4-81 Neighborhood Continuity .....................................................................................4-82 Emergency Services..............................................................................................4-82 Social Services......................................................................................................4-83 Relocations/Displacements................................................................................... 4-83 Temporary Impacts ............................................................................................... 4-84 Permanent Impacts................................................................................................ 4-86 Section 6 (f) of the Land and Water Conservation Fund Act ........................................ 4-88 Section 4(f) of the Department of Transportation Act................................................... 4-89 Utilities and Railroad ..................................................................................................... 4-97 Material Sources and Waste Materials ........................................................................ 4-100 Construction Water Source.......................................................................................... 4-101 Secondary Impacts.......................................................................................................4-101 Cumulative Impacts ..................................................................................................... 4-102 CHAPTER 5: PUBLIC INVOLVEMENT/PROJECT COORDINATION ...................5-1 CHAPTER 6: CONCLUSION .......................................................................................6-1 CHAPTER 7: PROJECT PREPARERS AND CONTRIBUTORS................................7-1 CHAPTER 8: BIBLIOGRAPHY ...................................................................................8-1 Appendices APPENDIX A: AGENCY SCOPING................................................................................. APPENDIX B: U.S. FISH AND WILDLIFE SERVICE CONSULTATION LETTERS . APPENDIX C: STAMINA MODELING RESULTS ......................................................... APPENDIX D: CULTURAL RESOURCES CONSULTATION LETTERS ................... APPENDIX E: SECTION 4(f) COORDINATION LETTERS .......................................... List of Tables Interstate 10 Traffic Interchange at Twin Peaks/Linda Vista iii Project No.: NH-010-D (AIW) TRACS No.: 10 PM 236 H5838 01D
Page 1: Interstate 10 Traffic Interchange a
Page 6 and 7: Draft Environmental Assessment Octo
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Page 18 and 19: Introduction October 2005 CHAPTER 1
Page 20 and 21: AVRA VALLEY RD MARANA I-10 SCENIC D
Page 22 and 23: Introduction October 2005 Cortaro R
Page 24 and 25: Project Purpose and Need October 20
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Alternatives October 2005 Near the
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Avra Valley Rd. Twin Peaks Rd. Silv
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Affected Environment and Environmen
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Interstate 10 Traffic Interchange a
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Conclusion October 2005 Interstate
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Bibliography October 2005 CHAPTER 8
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Bibliography October 2005 Tetra Tec
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