U.S. HWY 101/STATE ROUTE 46 EAST
IMPROVEMENT PROJECT
Initial Study with Mitigated Negative Declaration
This document contains a Mitigated Negative Declaration, which examines the environmental effects of a proposed project on the U.S. Highway 101/State Route 46 East Interchange in San Luis Obispo County.
The Initial Study and proposed Mitigated Negative Declaration were circulated to the public from August 11, 2009 to September 11, 2009. Comments received on the draft document and Caltrans’ responses to those comments are provided in the Comments and Responses section of this document (Appendix D), which has been added since the draft. Elsewhere throughout this document, a line in the margin indicates a change made since the draft document circulation.
What happens after this?
The proposed project has completed environmental compliance after the circulation of this document. When funding is approved, Caltrans can design and build all or part of the project.
Download Entire Document [pdf:13mb/226pp]
| Download Section 1 | |
| Cover, General Information | |
| Mitigated Negative Declaration | iv |
| Summary | vii |
| Table of Contents | xi |
| List of Figures | xiii |
| List of Tables | xiv |
| List of Abbreviated Terms | xv |
| List of Abbreviated Terms (continued) | xvi |
| Chapter 1 Proposed Project [pdf:5.4mb/34pp] | 17-50 |
| 1.1Introduction 17 1.1.1 Existing Facilities 17 1.2 Purpose and Need 18 1.2.1 Purpose 18 1.2.2 Need 19 1.3 Alternatives 28 1.3.1 Build Alternative 28 1.3.2 No-Build Alternative 45 1.3.3 Comparison of Alternatives 45 1.3.4 Identification of a Preferred Alternative 46 1.3.5 Alternatives Considered But Eliminated From Further Discussion 47 1.4 Permits and Approvals Needed 50 |
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| Chapter 2 Affected Environment, Environmental Consequences, and Avoidance, Minimization, and/or Mitigation Measures [pdf:5mb/96pp] | 51-146 |
| 2.1 Human
Environment 52 2.1.1 Land Use 52 2.1.2 Parks and Recreation 60 2.1.3 Utilities/Emergency Services 61 2.1.4 Traffic and Transportation/Pedestrian and Bicycle Facilities 63 2.1.5 Visual/Aesthetics 71 2.2 Physical Environment 84 2.2.1 Water Quality and Storm Water Runoff 84 2.2.2 Geology/Soils/Seismic/Topography 89 2.2.3 Hazardous Waste or Materials 93 2.2.4 Air Quality 97 2.2.5 Noise and Vibration 105 2.3 Biological Environment 122 2.3.1 Natural Communities122 2.3.2 Plant Species 134 2.4 Climate Change Under the California Environmental Quality Act 137 |
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| Chapter 3 Comments and Coordination | 147 |
| Chapter 4 List of Preparers | 149 |
| Chapter 5 References | 153 |
| Appendix A California Environmental Quality Act Checklist | 155 |
| Appendix B Title VI Policy Statement | 167 |
| Appendix C Avoidance, Minimization, and/or Mitigation Measures | 169 |
| Appendix D Comments and Responses | 181 |
| Appendix E Distribution List | 223 |
