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TABLE OF CONTENTS(continued) <br /> Chapter Page No. <br /> 3.15.3.1 Federal Highways 3-236 <br /> 3.15.3.2 State Routes 3-236 <br /> 3.15.3.3 County Roads 3-237 <br /> 3.15.3.3.1 County Road 125 3-237 <br /> 3.15.3.3.2 County Road 141 3-237 <br /> 3.15.3.3.3 County Road 211 3-237 <br /> 3.15.3.3.4 County Road 212 3-237 <br /> 3.15.3.3.5 County Road 213 3-238 <br /> 3.15.4 Environmental Consequences and Mitigation 3-238 <br /> 3.15.4.1 Refined Alternative 4 3-238 <br /> 3.15.4.2 Refined Alternative 6 3-244 <br /> 3.15.4.2.1 Structural Components 3-244 <br /> 3.15.4.3 No Action Alternative 3-245 <br /> 3.16 AIR QUALITY 3-246 <br /> 3.16.1 Introduction 3-246 <br /> 3.16.2 Methodology 3-246 <br /> 3.16.2.1 Evaluation Methodology 3-246 <br /> 3.16.2.2 Significance Criteria 3-246 <br /> 3.16.3 Affected Environment 3-247 <br /> 3.16.3.1 Climate 3-247 <br /> 3.16.3.2 Local Ambient Air Quality 3-247 <br /> 3.16.3.3 Regional Ambient Air Quality 3-248 <br /> 3.16.4 Environmental Consequences and Mitigation 3-249 <br /> 3.16.4.1 Refined Alternative 4 3-249 <br /> 3.16.4.1.1 Structural Component Impacts 3-249 <br /> 3.16.4.1.2 Non-Binding Water End Use and Conveyance <br /> Impacts 3-251 <br /> 3.16.4.2 Refined Alternative 6 3-253 <br /> 3.16.4.2.1 Structural Component Impacts 3-253 <br /> 3.16.4.2.2 Non-Structural Component Impacts 3-254 <br /> 3.16.4.2.3 Non-Binding End Use and Conveyance Impacts 3-255 <br /> 3.16.4.3 No Action Alternative 3-255 <br /> 3.17 NOISE 3-255 <br /> 3.17.1 Introduction 3-255 <br /> 3.17.2 Methodology 3-256 <br /> 3.17.2.1 Evaluation Methodology 3-256 <br /> 3.17.2.2 Significance Criteria 3-256 <br /> 3.17.3 Affected Environment 3-257 <br /> 3.17.3.1 Structural Components of Refined Alternative 4 3-258 <br /> 3.17.3.1.1 Durango Pumping Plant and Ridges Basin Inlet <br /> Conduit 3-258 <br /> 3.17.3.1.2 Ridges Basin Dam and Reservoir 3-258 <br /> 3.17.3.1.3 Navajo Nation Municipal Pipeline 3-258 <br /> 3.17.3.2 Structural Components of Refined Alternative 6 3-258 <br /> 3.17.3.2.1 Lemon Dam and Reservoir 3-258 <br /> 3.17.3.2.2 Navajo Nation Municipal Pipeline 3-259 <br /> 3.17.3.3 Non-Binding End Uses and Conveyance Systems 3-259 <br /> 3.17.4 Environmental Consequences and Mitigation 3-259 <br /> 3.17.4.1 Refined Alternative 4 3-259 <br /> xv <br />