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San Diego Freeway (I-405) Improvement Project Final Environmental Impact Report / Environmental Impact Statement

Busy Freeway

The Interstate 405 (I-405) Improvement Project proposes to widen the corridor by adding one general purpose (GP) lane in each direction between Euclid Street and I-605 and one tolled Express Lane in each direction between State Route 73 (SR-73) and State Route 22 (SR-22) east of I-405 to be managed jointly as a tolled Express Facility with two lanes in each direction between SR-73 and I-605. The objective is to open the tolled Express Lanes with a HOV2+ occupancy free to encourage rideshare and transit usage. Operational adjustments to the tolled Express Lanes may be implemented based on demand, rates of speed, traffic volumes, and to meet financial covenants, maintenance and operational obligations. The proposed action would improve the freeway mainline and interchanges on I-405 in Orange and Los Angeles counties for approximately 16 miles between 0.2-mile south of Bristol Street and 1.4 miles north of I-605, as well as portions of SR-22, SR-73, and I-605 to reduce congestion and improve lane continuity through the corridor.

Record of Decision

Notice of Determination

Final Environmental Impact Statement / Environmental Impact Report (FEIS/EIR)

Technical Studies
Information about physical copies of the project documents
OCTA page

Response to Comment on the Draft EIR/EIS and Supplemental EIS/EIR can be found under Appendix R1 and R2

The complete document is very large (about 1.63 gigabytes), links to individual chapters and sections are provided below for your convenience.

Final EIS/EIR:

Table of Contents
Front Matter (Cover Sheet, General Information About This Document, Title Sheet)
CHAPTER 1  Proposed Project (Introduction, Project Purpose and Need)
CHAPTER 2  Project Alternatives (Project Alternatives Background, Project Alternatives, Permits and Approvals Needed)
CHAPTER 3 Affected Environment, Environmental Consequences, And Avoidance, Minimization, and/or Mitigation Measures
3.1.1   Land Use
3.1.2   Growth
3.1.3   Farmlands/Timberland
3.1.4   Community Impacts
3.1.5   Utilities/Emergency Services
3.1.6   Traffic & Transportation/Pedestrian and Bicycle Facilities
3.1.7   Visual/Aesthetics
3.1.8   Cultural Resources
3.2.1   Hydrology and Floodplains
3.2.2   Water Quality and Stormwater Runoff
3.2.3   Geology/Soils/Seismic/Topography
3.2.4   Paleontology
3.2.5   Hazardous Waste/Materials
3.2.6   Air Quality
3.2.7   Noise
3.2.8   Energy
3.3.1   Natural Communities
3.3.2   Wetlands
3.3.3   Plant Species
3.3.4   Animal Species
3.3.5   TES
3.3.6  Invasive Species
3.4     Relationship between local short-term uses of the human enviroment and the maintenance of long-term productivity
3.5     Irreversible and irretrievable commitments of resources that would be involved in the proposed project
3.6     Cumulative Impacts        
CHAPTER 4 California Environmental Quality Act (CEQA) Evaluation
CHAPTER 5 Comments and Coordination
CHAPTER 6  List of Preparers
CHAPTER 7 Distribution List


Appendices Front Matter

Appendix A  - CEQA Checklist
Appendix B  - Resources Evaluated Relative to the Requirements of Section 4(f) and 6(f)
Appendix C - Title VI Policy Statement
Appendix D - Summary of Relocation Benefits
Appendix E - Environmental Commitment Record
Appendix F - List of Technical Studies
Appendix G - List of Acronyms
Appendix H - References
Appendix I   - Public and Agency Coordination
Appendix J - Air Quality (here is a rotated version for easier reading on line)
Appendix K -  Utility Locations
Appendix L - Traffic
Appendix M - Proposed Ramp Closure Detour Routes
Appendix N - Noise Information
Appendix O - Biological Resources
Appendix P - Project Plans (note: heavy graphics, may take longer to open)
Appendix Q  - Hydrology & Floodplains/Water Quality and Stormwater Runoff Exhibits
Appendix R1 - Volume 1  - Draft EIR/EIS Response to Comments (about 145MB)
Appendix R1 - Volume 2 - Draft EIR/EIS Response to Comments (about 80MB)
Appendix R2 - Supplemental Draft EIR/EIS Response to Comments (about 95MB)

Technical Studies: 

Air Quality Report (May 2011)
Air Quality Conformity Analysis (Jan 2015)
Interstate 405-Improvement Project Supplemental to the Air Quality Report (Feb 2015)

Jurisdictional Delineation Report (Mar 2012)
Natural Environment Study (Mar 2012)
405 Widening Project (12-0H100) Amendment to ECR and Errata for NES (Feb 2015)

Community Impact Assessment
Community Impact Assessment (Aug 2011)

Archaeological Survey Report (Aug 2011) - Confidential
Historical Resources Evaluation Report (Aug 2011)
Historic Property Survey Report (Aug 2011)

Hazardous Waste
Initial Site Assessment (Supplemental Report of Initial Site Assessment REV1 Mar 2011)

Floodplain Evaluation Report (Dec 2010)

Location Hydraulic Study (April 2011)
Preliminary Drainage Report (Nov 2011)


Noise Abatement Decision Report (Sept 2011)
Noise Study Report (June 2011)
Noise Study Report Amendment 1 (May 2012)
Noise Study Report Amendment 3 (Jul 2014)
Supplemental Noise Abatement Decision Report (Dec 2014)

Paleontological Identification Report/Paleontological Evaluation Report (Aug 2011)

Preliminary Geotechnical
District Preliminary Geotechnical Report (Dec 2011)

Right of Way
Relocation Impact Memorandum (Feb 2011)
Final Relocation Impact Memorandum (Feb 2015)

Traffic Study (May 2011)

Supplemental Traffic Study Report by Long Beach Area (Jun 2013)

Visual Impact Assessment
Visual Impact Assessment (May 2011)

Water Quality
Water Resources and Water Quality Technical Report (April 2011)


Notice of Availability


Comments may be sent via email to d12.405proj@dot.ca.gov. For general informtion about transportation issues, call the Public Information Office at (949) 724-2000.

Contact to get physical copies of the document:

The documents above are also available on CD and/or paper.

CD are $10.00 each, or a cComplete set of CD’s is $20.00 (Includes Final EIR/EIS with Appendices, Technical Studies).

Hard copies, delivery in California is approximately 5 working days.

Final EIR/EIS without Appendices $254.76.
Final EIR/EIS with Appendices $763.40.
Complete set of Technical Studies $1737.64.
Complete set of hard copies $2,755.80 (Includes Final EIR/EIS with Appendices, Technical Studies).

For CD or paper copies please contact Smita Deshpande via email d12.405proj@dot.ca.gov Attn: Iffat Qamar.

You may also want to visit the OCTA project page.

Thank you for your visit!