Gaviota Culvert Replacement Project
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Gaviota Culvert Replacement Project On US 101 in Santa Barbara County 05-SB-101-45.5 0512000068 SCH# 2018071001 Initial Study with Mitigated Negative Declaration Prepared by the State of California Department of Transportation February 2019 General Information About This Document General Information About This document The California Department of Transportation (Caltrans) has prepared this Initial Study with Mitigated Negative Declaration for the proposed project located in Santa Barbara County, California. Caltrans is the lead agency under the California Environmental Quality Act (CEQA). The document describes why the project is being proposed, what alternatives have been considered for the project, how the existing environment could be affected by the project, the potential impacts of each of the alternatives, and the proposed avoidance, minimization, and/or mitigation measures. The Initial Study circulated to the public for 30 days from July 2, 2018 to July 31, 2018. Comments received during this period are included in Chapter 4. Elsewhere throughout this document, a vertical line in the margin indicates a change made since the draft document circulation. Minor editorial changes and clarifications have not been so indicated. Additional copies of this document and the related technical studies are available for review at: Caltrans District 5, 50 Higuera Street, San Luis Obispo, CA 93401; and Goleta Branch Library, 400 N Fairview Avenue, Goleta, CA 93117. The document can also be downloaded at the following website: http://www.dot.ca.gov/d5/ What Happens After This? The proposed project has completed environmental compliance after the circulation of this document. When funding is approved, Caltrans may design and construct all or part of the project. Alternative Formats: For individuals with sensory disabilities, this document is available in Braille, in large print, on audiocassette, or on computer disk. To obtain a copy in one of these alternate formats, please call or write to Caltrans, Attn: Lara Bertaina, Senior Environmental Planner, 50 Higuera Street, San Luis Obispo, CA 93401, (805) 542-4603 or TTY (805) 549-303, or use California Relay Service 1 (800) 735-2929 (TTY), 1 (800) 735-2929 (Voice), or 711. SCH# 201807100 l 05-SB-10 l-45.5 0512000068 Replace Culvert on US IO I in Santa Barbara County at PM 45.5 INITIAL STUDY with Mitigated Negative Declaration Submitted Pursuant to: (State) Division 13, CaliforniaPublic Resources Code (Federal) 49 USC 303 THE STATE OF CALIFORNIA Depattment ofTranspo1tation Date ofApproval Central Coast Environmental Branch Manager California Department ofTransportation CEQA Lead Agency The following individual(s) may be contacted for more information about this document: Lara Be1taina Matt Fowler 50 Higuera Street 50 Higuera Street San Luis Obispo, CA 9340 l San Luis Obispo, CA 9340 l [email protected]. gov [email protected] (805) 542-46 l 0 (805) 542-4603 Gaviota Culvert Replacement • Mitigated Negative Declaration Pursuant to: Division 13, Public Resources Code Project Description The CaliforniaDepartment of Transportation (Caltrans) proposes to replace an existing Reinforced Concrete Box/Reinforced Concrete Pipe (RCB/RCP) culvert on US 101 in Santa Barbara County at Post Mile (PM) 45 .5 near Gaviota State Park. Determination This Mitigated Negative Declaration is included to give notice to interested agencies and the public that Caltrans' has adopted a Mitigated Negative Declaration for this project. This does not mean that Caltrans' decision on the project is final. Caltrans has prepared an Initial Study for this project and, following public review, has detennined from this study that the project would not have a significant effect on the environment for the following reasons. The proposed project would have no effect on: cultural resources, geology and soils, hazards and hazardous materials, land use and planning, mineral resources, population and housing, public services, recreation, or tribal cultural resources. In addition, the proposed project would have no significanteffect on: aesthetics, agriculture, air quality, hydrology and water quality, migratory birds, threatened and endangered species, noise, transportation/traffic, nor utilities and service systems. In addition, the proposed project would have no significantlyadverse effect on wetlands and waters or sensitive coastal habitat because the following mitigation measures would reduce potential effects to insignificance: • The impacts would be mitigated by replacing wetlands and waters at a l: 1 ratio for temporary impacts. • The impacts would be mi ti gated by replacing wetlands and waters at a 3: 1 ratio for permanent impacts. • The impacts would be mitigated by replacing Coastal Scrub habitat at a 1: l ratio for temporary impacts. • The impacts would be mitigated by replacing Coastal Scrub habitat at a 2:1 ratio for permanent impacts. i,y Date2/ zB(,9 Environmental Planner CaliforniaDepartment of Transportation Gaviota Culvert Replacement iv Table of Contents Mitigated Negative Declaration .......................................................................................... iii Table of Contents ................................................................................................................. v List of Figures ...................................................................................................................... vi List of Tables ....................................................................................................................... vi Chapter 1 Proposed Project ......................................................................................... 1 1.1 Introduction ............................................................................................................ 1 1.2 Purpose and Need .................................................................................................. 1 1.2.1 Purpose ........................................................................................................... 1 1.2.2 Need ................................................................................................................ 1 1.3 Project Description ................................................................................................ 1 1.4 Project Alternatives .... ............................................................................................ 2 1.4.1 Build Alternatives ........................................................................................... 2 1.4.2 No-Build (No-Action) Alternative ................................................................. 3 1.5 Alternatives Considered but Eliminated from Further Discussion ........................ 9 1.6 Permits and Approvals Needed .............................................................................. 9 Chapter 2 Affected Environment, Environmental Consequences, and Avoidance, Minimization, and/or Mitigation Measures ........................................................................ 11 2.1 Human Environment ............................................................................................ 12 2.1.1 Coastal Zone ................................................................................................. 12 2.2 Biological Environment ....................................................................................... 20 2.2.1 Natural Communities .................................................................................... 20 2.2.2 Wetlands and Other Waters .......................................................................... 30 2.2.3 Threatened and Endangered Species ............................................................ 37 2.3 Cumulative Impacts ............................................................................................. 50 Chapter 3 CEQA Evaluation ..................................................................................... 59 3.1 Determining Significance under CEQA .............................................................. 59 3.2 CEQA Environmental Checklist .......................................................................... 59 3.3 Climate Change .................................................................................................... 70 Chapter 4 Comments and Coordination .................................................................... 85 Chapter 5 List of Preparers ...................................................................................... 109 Chapter 6 Distribution List ...................................................................................... 112 Appendix A Section 4(f) .......................................................................................... 114 Appendix B Title VI Policy Statement .................................................................... 118 Appendix C Species Lists ........................................................................................ 119 Appendix D Avoidance, Minimization and/or Mitigation Summary ...................... 127 List of Technical Studies .................................................................................................. 134 Gaviota Culvert Replacement v List of Figures Figure 1-1: Project Vicinity and Location Map ............................................................ 2 Figure 1-2: Project Footprint ........................................................................................ 5 Figure 1-3: Location of Proposed and Existing Culvert Systems