State Route 91 Improvement Project
(SR-57 to SR-55)

The California Department of Transportation (Caltrans) District 12, in cooperation with the Orange County Transportation Authority (OCTA), proposes to widen and make operational improvements, including reconstructing ramps, bridges, and connectors on State Route 91 (SR-91), from west of State College Boulevard to east of Lakeview Avenue, Post Mile (PM) 4.8 to PM R10.4, SR-57 from PM 15.6 to 16.1, and SR-55 from PM 17.5 to R17.9 in the cities of Anaheim, Fullerton, Orange, and Placentia in Orange County. This segment of SR-91 crosses the Santa Ana River and the OCTA/SCRRA Railroad. In addition to the No Build Alternative, there is a single Build Alternative under consideration. Minor Right-of-Way acquisitions are anticipated.

The information in the Draft Inital Study/Environmental Assessment is intended to provide project information such as alternaives being considered, how the existing environment could be potentially affected by the project, and how these impacts will be avoided, minimized, and/or mitigated.

Public Notice

Anticipated Schedule:
PA&ED – Present until Summer 2019
Design – Summer 2022 to Summer 2025
Construction – Summer 2026 to Winter 2030

Initial Study with Proposed Negative Declaration/Environmental Assessment
Cover page/General Information/Title Page
Proposed Negative Declaration
Table of Contents
CHAPTER 1 - Proposed Project
CHAPTER 2 - Affected Environment, Environmental Consequences, and Avoidance,
Minimization, and/or Mitigation Measures
2.1.1 Land Use

2.1.2 Growth
2.1.3 Community Impacts
2.1.4 Utilities/Emergency Services
2.1.5 Traffic and Transportation/Pedestrian and Bicycle Facilities
2.1.6 Visual/Aesthetics
2.1.7 Cultural Resources
2.2.1 Hydrology and Floodplain
2.2.2 Water Quality and Storm Water Runoff
2.2.3 Geology
2.2.4 Paleontology
2.2.5 Hazardous Waste/Materials
2.2.6 Air Quality
2.2.7 Noise
2.3.1 Natural Communities
2.3.2 Wetlands and Other Waters
2.3.3 Plant Species
2.3.4 Animal Species
2.3.5 Threatened and Endangered Species
2.3.6 Invasive Species
2.4 Cumulative Impacts
CHAPTER 3 - CEQA Evaluation
CHAPTER 4 - Comments and Coordination
CHAPTER 5 - List of Preparers
CHAPTER 6 - Distribution List

Appendix A - Section 4(f)
Appendix B - Title VI Policy Statement
Appendix C - Summary of Relocation Benefits
Appendix D - Avoidance, Minimization, and/or Mitigation Summary
Appendix E - List of Acronyms and Abbreviations
Appendix F - FTIP Project Listings
Appendix G - Evaluated Noise Barriers
Appendix H - Project Plans

Please submit your comments in writing no later than 5 pm, December 21, 2018 to Kathleen Dove, Associate Environmental Planner, California Department of Transportation, District 12, Environmental Analysis, 1750 East 4th Street, Santa Ana, CA 92705 or via e-mail to:

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