Route 91 Widening Project

4 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 12
Document Title
Route 91 Widening Project
Document Type
NOD - Notice of Determination

Document Description
The proposed project consists of improvements to SR-91 in Orange County by adding one general-purpose lane on SR-91 eastbound from the SR-91/SR-55 (PM 9.1) separation to east of the Weir Canyon Road on-ramp (PM 15.0), and on SR-91 westbound from west of the SR-91/SR-241 separation (PM 15.1) to the SR-90/SR-91 separation (Imperial Highway Undercrossing(PM11.1)). The project would relive congestion and improve operational efficiency on SR-91 between SR-55 and west of SR-241. The total length of the project is 6.0 miles. The project will extend existing culverts associated with the roadway widening. A total of 4,400 cubic yards of roadway backfill will be used to fill existing earthen, asphalt and concrete ditches and replace them with .0575 acres of bioswale and/or bioswale and pipe combinations. The path of flow will not change. Measures have been included in Streambed Alteration Agreement 1600-2010-0194-R5, issued by the Department of Fish and Game (DFG), to avoid these potential impacts.

Contact Information
Tim Dillingham
Fish and Game
Lead/Public Agency
4949 Viewridge Ave
San Diego, CA 92123

Phone : (858) 467-4250


Anaheim Yorba Linda

Notice of Determination

Approving Agency
Approving Agency Role
Responsible Agency
Approved On
Final Environmental Document Available at
Caltrans 3337 Michelson Drive, Suite 300 Irvine, CA 92612


(1) The project will have a significant impact on the environment
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
(3) Mitigated measures were made a condition of the approval of the project
(4) A mitigation reporting or monitoring plan was adopted for this project
(5) A Statement of Overriding Considerations was adopted for this project
(6) Findings were made pursuant to the provisions of CEQA

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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