Interstate 405 Improvement Project from Interstate 5 to State Route 55

5 Documents in Project


SCH Number
Lead Agency
Caltrans 12 (Santa Ana) (California Department of Transportation, District 12)
Document Title
Interstate 405 Improvement Project from Interstate 5 to State Route 55
Document Type
FIN - Final Document
Present Land Use
residential, commercial, open space, urban, and industrial

Document Description
The project corridor is located primarily in the city of Irvine in Orange County; north of MacArthur Blvd, I-405 traverses unincorporated Orange County and the city of Costa Mesa and is approx 8.5 miles long. The proposed project build alternatives would reduce congestion and improve operational efficiency on I-405 between I-5 and SR-55 by adding one or two GP lanes and auxiliary lanes.

Contact Information
Carmen Lo
California Department of Transportation, District 12
1750 East 4th St #100
Santa Ana, CA 92705

Phone : (657) 328-6162


Cross Streets
Irvine Center Dr; Sand Canyon Ave; Jeffrey Rd; Culver Dr, Jamboree Rd; MacArthur Blvd
Total Acres
7.6 new paved
Parcel #
466-083-13, -14
State Highways
55, 73, 133
John Wayne
5 within 0.5 mile
San Diego Creek, San Joaquin/Lane/Culver Channels

Notice of Completion

Development Type
Transportation:Other (highway/freeway (widening))
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Economics/Jobs Fiscal Impacts Flood Plain/Flooding Geologic/Seismic Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Soil Erosion/Compaction/Grading Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
Air Resources Board, Major Industrial Projects Air Resources Board, Transportation Projects California Department of Fish and Wildlife, South Coast Region 5 California Department of Parks and Recreation California Highway Patrol California Native American Heritage Commission California Public Utilities Commission California Regional Water Quality Control Board, Santa Ana Region 8 Caltrans, Division of Aeronautics Department of Water Resources Office of Historic Preservation Resources Agency

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613.

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