2018 Regional Transportation Plan and Sustainable Communities Strategy for the Shasta Region Final Supplemental Environmental Impact Report SCH#2014022018 prepared by Shasta Regional Transportation Agency 1255 East Street, Suite 202 Redding, California, 96001 Contact: Sean Tiedgen, Senior Transportation Planner Phone: (530) 262‐6185 prepared with the assistance of Rincon Consultants, Inc. 4825 J Street, Suite 200 Sacramento, California, 95819 August 2018 2018 Regional Transportation Plan and Sustainable Communities Strategy for the Shasta Region Final Supplemental Environmental Impact Report SCH#2014022018 prepared by Shasta Regional Transportation Agency 1255 East Street, Suite 202 Redding, California, 96001 Contact: Sean Tiedgen, Senior Transportation Planner Phone: (530) 262‐6185 prepared with the assistance of Rincon Consultants, Inc. 4825 J Street, Suite 200 Sacramento, California, 95819 August 2018 This report prepared on 50% recycled paper with 50% post‐consumer content. Table of Contents Table of Contents Executive Summary ...........................................................................................................................ES‐1 Project Synopsis .........................................................................................................................ES‐1 Alternatives ................................................................................................................................ES‐2 Areas of Known Controversy .....................................................................................................ES‐3 Issues to Resolve ........................................................................................................................ES‐3 Summary of Impacts and Mitigation Measures ........................................................................ES‐3 1 Introduction ................................................................................................................................ 1‐1 1.1 Project Background ......................................................................................................... 1‐1 1.2 Purpose and Legal Authority ........................................................................................... 1‐2 1.3 SEIR Background ............................................................................................................. 1‐3 1.4 SEIR Organization ............................................................................................................ 1‐4 1.5 Baseline and Approach for Impact Analysis .................................................................... 1‐5 1.6 Environmental Review Process ....................................................................................... 1‐5 2 Project Description ..................................................................................................................... 2‐1 2.1 Lead Agency Name and Address ..................................................................................... 2‐1 2.2 Project Location .............................................................................................................. 2‐1 2.3 Project Objectives ........................................................................................................... 2‐1 2.4 Project Characteristics .................................................................................................... 2‐6 2.5 Other Public Agencies Whose Approval is Required .................................................... 2‐10 2.6 Relationship with Other Plans and Programs ............................................................... 2‐11 3 Environmental Setting ................................................................................................................ 3‐1 3.1 Regional Setting .............................................................................................................. 3‐1 3.2 Regional Transportation System ..................................................................................... 3‐1 3.3 Cumulative Projects Setting ............................................................................................ 3‐3 3.3.1 CEQA Requirements ............................................................................................ 3‐3 3.3.2 Growth Projections in the Region ....................................................................... 3‐3 4 Environmental Impact Analysis .................................................................................................. 4‐1 4.1 Air Quality .................................................................................................................... 4.1‐1 4.1.1 Setting .............................................................................................................. 4.1‐1 4.1.2 Impact Analysis ................................................................................................. 4.1‐7 4.2 Greenhouse Gas Emissions .......................................................................................... 4.2‐1 4.2.1 Setting .............................................................................................................. 4.2‐1 4.2.2 Impact Analysis ................................................................................................. 4.2‐7 4.3 Hazards and Hazardous Materials ............................................................................... 4.3‐1 4.3.1 Setting .............................................................................................................. 4.3‐1 4.3.2 Impact Analysis ................................................................................................. 4.3‐5 4.4 Transportation and Circulation .................................................................................... 4.4‐1 4.4.1 Setting .............................................................................................................. 4.4‐1 4.4.2 Impact Analysis ................................................................................................. 4.4‐8 Final Supplemental Environmental Impact Report i Shasta Regional Transportation Agency 2018 Regional Transportation Plan and Sustainable Communities Strategy for the Shasta Region 4.5 Tribal Cultural Resources ............................................................................................. 4.5‐1 4.5.1 Setting .............................................................................................................. 4.5‐1 4.5.2 Impact Analysis ................................................................................................. 4.5‐2 5 Other CEQA Required Discussions .............................................................................................. 5‐1 5.1 Growth Inducement ........................................................................................................ 5‐1 5.1.1 Economic Growth ................................................................................................ 5‐1 5.1.2 Employment, Household, and Population Growth ............................................. 5‐1 5.1.3 Removal of an Impediment to Growth ............................................................... 5‐2 5.2 Irreversible Environmental Effects .................................................................................. 5‐2 5.3 List of Significant and Unavoidable Impacts ................................................................... 5‐3 6 Alternatives ................................................................................................................................. 6‐1 6.1 Methodology ................................................................................................................... 6‐1 6.2 Alternatives Considered and Rejected ............................................................................ 6‐2 6.3 Alternative 1: No Project Alternative .............................................................................. 6‐2 6.3.1 Description .......................................................................................................... 6‐2 6.3.2 Impact Analysis .................................................................................................... 6‐2 6.4 Alternative 2: No Project 2015 RTP/SCS Alternative ...................................................... 6‐5 6.4.1 Description .......................................................................................................... 6‐5 6.4.2 Impact Analysis .................................................................................................... 6‐5 6.5 Alternative 3: Increased Infill Alternative ....................................................................... 6‐8 6.5.1 Description .......................................................................................................... 6‐8 6.5.2 Impact Analysis .................................................................................................... 6‐8 6.6 Environmentally Superior Alternative .......................................................................... 6‐11 7 References .................................................................................................................................. 7‐1 7.1 Bibliography .................................................................................................................... 7‐1 7.2 List of Preparers .............................................................................................................