Tom Lantos Tunnel Jet Fan Repairs DO (EA 1V030)
Summary
SCH Number
2026040674
Public Agency
California Department of Transportation, District 4
(DOT)
Document Title
Tom Lantos Tunnel Jet Fan Repairs DO (EA 1V030)
Document Type
NOE - Notice of Exemption
Received
Posted
4/15/2026
Document Description
Caltrans proposes repairing and replacing malfunctioning jet fans and restoring reliable emergency radio communication coverage in the Tom Lantos Tunnel on Highway 1. The Office of the State Fire Marshal issued an Inspection Report Violation following an observed deficiency during Caltrans’ Devil’s Slide Emergency Drill. During the drill, four jet fans were found to be non-operational. A formal Violation Notice was issued, requiring corrective action. Jet fans are critical components of the tunnel’s life safety system and are required to control smoke and heated gases during fire incidents, thereby maintaining tenable conditions for the traveling public and supporting firefighter operations. Currently, three jet fans in the left bore and one in the right bore are out of service, exceeding the allowable redundancy threshold and creating a serious life safety risk. The project will remove and replace the malfunctioning jet fans. As in-place vibration analysis will be performed. The emergency communication system will be restored to ensure reliable emergency radio communication coverage within tunnel facilities. Temporary traffic control will be required during repairs.
Contact Information
Name
Juliane Smith
Agency Name
Caltrans
Job Title
Senior Environmental Scientist (NEPA/CEQA Specialist)
Contact Types
Lead/Public Agency / Project Applicant / Parties Undertaking Project
Address
Phone
Email
Location
Cities
Pacifica
Counties
San Mateo
Regions
Northern California, San Francisco Bay Area
State Highways
1
Other Location Info
The project is located in the Tom Lantos Tunnel (Tunnel No. 35-0330L) on Highway 1 in the City of Pacifica from post mile (PM) R38.56 to R39.37.
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
PRC 21084; 14 CCR 15301 Class 1
Reasons for Exemption
Class 1 Existing Facilities. The project is not anticipated to result in any environmental impacts. The project contains a number of standardized project measures which are employed on most, if not all, Caltrans projects and were not developed in response to any specific environmental impacts resulting from the project.
County Clerk
San Mateo
Attachments
Notice of Exemption
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