State Route 91 Improvement Project Between State Route 57 and State Route 55

4 Documents in Project


SCH Number
Lead Agency
Caltrans 12 (Santa Ana) (California Department of Transportation, District 12)
Document Title
State Route 91 Improvement Project Between State Route 57 and State Route 55
Document Type
NEG - Negative Declaration
Present Land Use
caltrans operational ROW, industrial, residential, commercial, parkland, OCFCD, OCWD

Document Description
Caltrans District 12, in cooperation with the Orange County Transportation Authority, is proposing to improve traffic operations on SR 91 from PM 4.8 to PM R10.4, SR 57 from PM 15.6 to PM 16.1, and on SR 55 from PM 17.5 to PM R17.9 in the cities of Anaheim, Fullerton, Orange, and Placentia in Orange County, CA, a distance of approx 5.6 miles. The proposed improvements would include the SR-91 freeway mainline widening, primarily in the eastbound direction, and modifications to various interchanges, connectors, ramps, and intersections. Construction of the proposed project is expected to begin in 2026 and is anticipated to be completed in 2030, a duration of approx 3.5 years. The project is classified as category 4A, as described in Chapter 8 of the project development procedures manual.

Contact Information
Kathleen Dove
California Department of Transportation, District 12
1750 E. 4th St, Suite 100
Santa Ana, CA 92705

Phone : (657) 328-6153


33°50'39"N 117°49'41"W
Anaheim Fullerton Orange Placentia
Cross Streets
intersection of SR 91, SR 57, SR 55 (5.6 miles)
Total Acres
Parcel #
State Highways
91, 57, 55, 90
Souther CA Regional Rail Authori
Santa Ana River

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Other (freeway widening with improvements (5.6 mi))
Local Action
Other Action Other Action: transportation project
Project Issues
Aesthetic/Visual Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Soil Erosion/Compaction/Grading Solid Waste Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects Other Other Issues: community impacts, environmental justice, railroad, and energy
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Parks and Recreation California Department of Transportation, District 12 California Native American Heritage Commission California Public Utilities Commission California Regional Water Quality Control Board, Santa Ana Region 8 California State Lands Commission Department of Toxic Substances Control Office of Historic Preservation Resources Agency San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy State Water Resources Control Board, Division of Drinking Water California Department of Fish and Wildlife, South Coast Region 5 California Highway Patrol

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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