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

5 Documents in Project


SCH Number
Lead Agency
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
Agency Name
California Department of Transportation, District 12
Contact Types
Lead/Public Agency


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

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Parks and Recreation, California Department of Transportation, District 12 (DOT), California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Office of Historic Preservation, Resources Agency, San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy (RMC), State Water Resources Control Board, Division of Drinking Water, California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Highway Patrol
State Reviewing Agency Comments
California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Highway Patrol
Development Types
Transportation:Other (freeway widening with improvements (5.6 mi))
Local Actions
transportation project
Project Issues
Aesthetics, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Flood Plain/Flooding, Geology/Soils, Growth Inducement, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire, community impacts, environmental justice, railroad, and energy

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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