Long Canyon Mine Chapter 3

CHAPTER 3 AFFECTED ENVIRONMENT CHAPTER 3 TABLE OF CONTENTS CHAPTER 3 AFFECTED ENVIRONMENT ..............................................................................3-1 3.1 INTRODUCTION ...................................................................................................3-1 3.2 WATER RESOURCES ...........................................................................................3-1 3.2.1 Areas of Analysis ...................................................................................3-1 3.2.1.1 Proposed Action .......................................................................3-1 3.2.1.2 North Facilities Alternative ........................................................3-2 3.2.1.3 No Action Alternative ................................................................3-4 3.2.2 Data Sources and Methodology ............................................................3-4 3.2.2.1 Proposed Action .......................................................................3-4 3.2.2.2 North Facilities Alternative ...................................................... 3-11 3.2.2.3 No Action Alternative .............................................................. 3-11 3.2.3 Existing Conditions .............................................................................. 3-11 3.2.3.1 Proposed Action ..................................................................... 3-11 3.2.3.2 Power Supply Pipeline ............................................................ 3-48 3.2.3.3 Cities’ Water Supply ............................................................... 3-51 3.2.3.4 North Facilities Alternative ...................................................... 3-52 3.2.3.5 No Action Alternative .............................................................. 3-54 3.3 WETLAND AND RIPARIAN RESOURCES ............................................................... 3-54 3.3.1 Areas of Analysis ................................................................................. 3-55 3.3.1.1 Proposed Action ..................................................................... 3-55 3.3.1.2 North Facilities Alternative ...................................................... 3-55 3.3.1.3 No Action Alternative .............................................................. 3-55 3.3.2 Data Sources and Methodology .......................................................... 3-55 3.3.2.1 Proposed Action ..................................................................... 3-59 3.3.2.2 North Facilities Alternative ...................................................... 3-60 3.3.2.3 No Action Alternative .............................................................. 3-60 3.3.3 Existing Conditions .............................................................................. 3-60 3.3.3.1 Proposed Action ..................................................................... 3-60 3.3.3.2 North Facilities Alternative ...................................................... 3-66 3.3.3.3 No Action Alternative .............................................................. 3-66 3.4 GEOLOGY AND MINERALS ................................................................................. 3-66 3.4.1 Areas of Analysis ................................................................................. 3-67 3.4.1.1 Proposed Action ..................................................................... 3-67 3.4.1.2 North Facilities Alternative ...................................................... 3-67 3.4.1.3 No Action Alternative .............................................................. 3-67 3.4.2 Data Sources and Methodology .......................................................... 3-67 3.4.2.1 Proposed Action ..................................................................... 3-67 3.4.2.2 North Facilities Alternative ...................................................... 3-69 3.4.2.3 No Action Alternative .............................................................. 3-69 3.4.3 Existing Conditions .............................................................................. 3-69 3.4.3.1 Proposed Action ..................................................................... 3-69 3.4.3.2 North Facilities Alternative ...................................................... 3-80 3.4.3.3 No Action Alternative .............................................................. 3-81 3.5 SOILS .............................................................................................................. 3-81 3.5.1 Areas of Analysis ................................................................................. 3-81 3.5.1.1 Proposed Action ..................................................................... 3-81 3.5.1.2 North Facilities Alternative ...................................................... 3-81 3.5.1.3 No Action Alternative .............................................................. 3-81 3.5.2 Data Sources and Methodology .......................................................... 3-81 3.5.2.1 Proposed Action ..................................................................... 3-81 LONG CANYON PROJECT DEIS 3-i 3.5.2.2 North Facilities Alternative ...................................................... 3-83 3.5.2.3 No Action Alternative .............................................................. 3-83 3.5.3 Existing Conditions .............................................................................. 3-83 3.5.3.1 Proposed Action ..................................................................... 3-84 3.5.3.2 North Facilities Alternative ...................................................... 3-88 3.5.3.3 No Action Alternative .............................................................. 3-88 3.6 AIR RESOURCES ............................................................................................... 3-88 3.6.1 Areas of Analysis ................................................................................. 3-88 3.6.1.1 Proposed Action ..................................................................... 3-88 3.6.1.2 North Facilities Alternative ...................................................... 3-89 3.6.1.3 No Action Alternative .............................................................. 3-89 3.6.2 Data Sources and Methodology .......................................................... 3-89 3.6.2.1 Proposed Action ..................................................................... 3-91 3.6.2.2 North Facilities Alternative ...................................................... 3-92 3.6.2.3 No Action Alternative .............................................................. 3-92 3.6.3 Existing Conditions .............................................................................. 3-92 3.6.3.1 Proposed Action ..................................................................... 3-92 3.6.3.2 North Facilities Alternative ...................................................... 3-97 3.6.3.3 No Action Alternative .............................................................. 3-97 3.7 VEGETATION, INCLUDING NOXIOUS AND INVASIVE WEEDS AND SPECIAL STATUS PLANTS ............................................................................................... 3-97 3.7.1 Areas of Analysis ................................................................................. 3-97 3.7.1.1 Proposed Action ..................................................................... 3-97 3.7.1.2 North Facilities Alternative ...................................................... 3-97 3.7.1.3 No Action Alternative .............................................................. 3-97 3.7.2 Data Sources and Methodology .......................................................... 3-98 3.7.2.1 Proposed Action ..................................................................... 3-99 3.7.2.2 North Facilities Alternative .................................................... 3-103 3.7.2.3 No Action Alternative ............................................................ 3-103 3.7.3 Existing Conditions ............................................................................ 3-104 3.7.3.1 Proposed Action ................................................................... 3-104 3.7.3.2 North Facilities Alternative .................................................... 3-117 3.7.3.3 No Action Alternative ............................................................ 3-117 3.8 WILDLIFE RESOURCES, INCLUDING MIGRATORY BIRDS AND SPECIAL STATUS SPECIES ........................................................................................................ 3-118 3.8.1 Areas of Analysis ............................................................................... 3-121 3.8.1.1 Proposed Action ................................................................... 3-121 3.8.1.2 North Facilities Alternative .................................................... 3-121 3.8.1.3 No Action Alternative ............................................................ 3-121 3.8.2 Data Sources and Methodology ........................................................ 3-122 3.8.2.1 Proposed Action ................................................................... 3-124 3.8.2.2 North Facilities Alternative .................................................... 3-126 3.8.2.3 No Action Alternative ............................................................ 3-126 3.8.3 Existing Conditions ............................................................................ 3-126 3.8.3.1 Proposed Action ...................................................................

Long Canyon Mine Chapter 3

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