Mt Vernon Interstate 10 Improvements


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Public Notice 

EA 08-1G800 (PN 0816000102)

What's being planned?

The San Bernardino County Transportation Authority (SBCTA), in cooperation with the California Department of Transportation (Caltrans) and the City of Colton, proposes to construct improvements to Mount (Mt.) Vernon Avenue to accommodate four continuous through lanes through the interchange, two additional left turn lanes in the northbound direction, and bike lanes in both northbound and southbound directions, at Interstate 10 (I-10), from Post Mile (PM) R22.7 to PM R24.3, between 9th Street and the Interstate 215 (I-215) interchange in the City of Colton, San Bernardino County. The Mt. Vernon Avenue overhead structure will be reconstructed to accommodate the widening on Mt. Vernon Avenue and to span the future widening of the I-10 freeway to its ultimate configuration. Mt Vernon, south of the eastbound I-10 ramps, will also be widened to accommodate a left turn lane in the northbound direction. The project would upgrade bicycle access on the bridge from Class III to Class II, add a sidewalk on the northeastern side of the bridge, and address Americans with Disabilities Act standards with up-to-date curb ramps.

Why this notice?

Caltrans has studied the effects this project may have on the environment. Our studies show it will not significantly affect the quality of the environment. The report that explains the effects of the project is called an Initial Study (IS). This notice is to advise you of the preparation of the Draft Initial Study with Proposed Mitigated Negative Declaration (MND) and of its availability for you to read.

What's available?

Maps for the Draft IS with Proposed MND and other project information are available for review on the project website at Additional copies of the Draft IS with Proposed MND can be obtained by emailing the project email at:

Where you come in?

Do you have any comments about processing the project with a a Mitigated Negative Declaration and the IS? Do you disagree with the findings of our study as set forth in the Proposed MND? Would you care to make any other comments on the project? Please submit your comments via email to or in writing to the following address, no later than Tuesday, August 3, 2021:

California Department of Transportation, District 8 ATTN: Antonia Toledo, Senior Environmental Planner 464 West 4th Street, 6th Floor MS-820 San Bernardino, CA 92401-1400; Please include "Mt. Vernon Avenue Improvements Project at I-10” in the subject line of your email.

We will be accepting comments from Friday, July 2, 2021 through Tuesday, August 3, 2021. If there are no major comments, SBCTA will proceed with the project’s design.

When and where?

A virtual open house will be hosted online, on the Zoom conferencing platform, on Thursday, July 15, 2021 from 6:00 p.m. to 7:00 p.m. For more information on how to register and details regarding the virtual open house, please visit the project website at Contact

For more information about this study or any transportation matter, contact the Caltrans District 8 Office of Public Affairs at (909) 383-4631. For individuals with sensory disabilities, this document can be made available in Braille, in large print, on audiocassette, or on computer disk. To obtain a copy in one of these alternate formats, call or write to Antonia Toledo, Senior Environmental Planner, 464 W. 4th Street, 6th Floor MS-820, San Bernardino, CA 92401; (909) 501-5741; or use the California Relay Service 1 (800) 735-2929 (TTY to Voice), 1 (800) 735-2922 (Voice to TTY), 1 (800) 854-7784 (Spanish and English Speech to Speech), or dial 711.