US 101 Irwin Creek Culvert Rehabilitation Project

3 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 4
Document Title
US 101 Irwin Creek Culvert Rehabilitation Project
Document Type
NEG - Negative Declaration
Present Land Use
Highway Corridor
Document Description
The proposed project is located in the City of San Rafael, Marin County, California, at post mile 11 .3. Rehabilitation would include repairs to portions of the Irwin Creek culvert (Bridge No. 27-0097) system that crosses under and is adjacent to US 101. This culvert system consists of eight culvert segments. The project propose to repair five of the eight culverts, located between the southbound US 101 Central San Rafael off-ramp and the US 101 Linden Lane underpass. Access to the culvert system and construction staging would be required on both sides of US 101 through utilization of local streets, Caltrans right-of-way, and temporary easements. The purpose of the project is to prevent potential undermining of US 101 ca used by culvert failure.

Contact Information

Arnica Maccarthy
Agency Name
California Department of Transportation (Caltrans) District 4
Contact Types
Lead/Public Agency

Agency Name
Caltrans District 4
Contact Types
Project Applicant


San Rafael
Cross Streets
Between southbound US 101 Central San Rafael off-ramp and US 101 Linden Lane underpass
State Highways
Sonoma-Marin Area Rail Transit
Coleman Elementary
Irwin Creek

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
Air Resources Board, Transportation Projects, California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Highway Patrol, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), Department of Toxic Substances Control, Department of Water Resources, Office of Historic Preservation, Resources Agency, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance
Development Types
Transportation:Other (Culvert Rehabilitation)
Project Issues
Aesthetics, Biological Resources, Greenhouse Gas Emissions, Hydrology/Water Quality, Land Use/Planning, Noise, Transportation, Wetland/Riparian


Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, 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. For more information, please visit OPR’s Accessibility Site.

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