Summary
Project Description
The Marin County Flood Control District is proposing to construct a sheet pile floodwall along the top of the existing earthen levee, from 55 Meadow Drive, west of the Meadow Drive Bridge, to Pump Station 5, which is just east of 825 Vendola Drive. The total length of the floodwall would be about 7,800 feet, and the maximum width would be about 14 inches. The floodwall would be constructed of composite or steel sheet piles. At the seven locations where storm drain and sewer main outfalls pass beneath or over the levee, the Project would route the pipelines through the sheet pile wall and use a clay check dam or similar materials to provide continuous flood protection. The District’s objective for the Project is to provide protection for the Santa Venetia neighborhood from the 100-year flood for the 30-year design life of the Project.
Review type
Mitigated Negative Declarations (MND), Subsequent Environmental Review (SER)Status
Location
A residential neighborhood in Santa Venetia, located in unincorporated Marin County along the south bank of South Fork Gallinas Creek and an existing earthen levee from 55 Meadow Drive, west of the Meadow Drive Bridge, to Pump Station 5, which is just east of 825 Vendola Drive, San Rafael.
Other Project Contact
Robin Bartlett , Principal EngineerNotice of Availability
The Marin County Flood Control District has completed a revised Draft Supplemental Environmental Review and Subsequent Mitigated Negative Declaration (SER/Subsequent MND) for the Santa Venetia Floodwall Project. The revised Draft SER/Subsequent MND is linked below in the "Environmental Review Materials" section near the bottom of this page. A previous version of the Draft SER/Subsequent MND was prepared in 2023 but was never certified; it is available for review below in the "2023/2024 Documents" section of this page. The revised Draft SER/Subsequent MND was prepared after minor design updates were made to the project. The 30-day public comment period on the adequacy of the revised Draft SER/Subsequent MND began on Friday, August 28, 2026 and ended on Monday, September 28, 2026.
A Response to Comments document was prepared to address the written comments received during the public comment period and is also linked below in the "Environmental Review Documents" section of this webpage. The Response to Comments will be included as part of the Final SER/Subsequent MND which will be considered by the Marin County Flood Control District Board.
A public hearing on the adequacy of the revised Draft SER/Subsequent MND will be conducted by the Marin County Flood Control District Board. Oral and written comments on the revised Draft SER/Subsequent MND may be presented to the Flood Control District Board at the hearing. The hearing is scheduled for the regular meeting of the Marin County Flood Control District Board on Tuesday, October 20, 2026 in the Marin County Board of Supervisors Chambers at the Marin County Civic Center at 3501 Civic Center Drive, Room 328 (Administration Building), San Rafael, California, at which time all persons interested in this matter may appear and be heard.
Public Notice
- Notice of Availability for the revised 2026 Draft SER/Subsequent MND
Environmental Review Documents
The documents in this list may not work with all assistive technology and are being remediated. For alternative formats, please email Tammy Taylor or phone 415-473-7873. To use the California relay service, dial 711.
- Santa Venetia Floodwall - 2026 Draft SER (24.11 MB) — The 2026 revised Draft Supplemental Environmental Review and Subsequent Mitigated Negative Declaration for the proposed Santa Venetia Floodwall Project, a supplement to the 2019 Gallinas Levee Upgrade Initial Study/Mitigated Negative Declaration prepared for the project.
- Santa Venetia Floodwall - 2026 Response to Comments (14.10 MB) — The Response to Comments for public comments received on the revised Draft Supplemental Environmental Review and Subsequent Mitigated Negative Declaration (SER/Subsequent MND) for the proposed Santa Venetia Floodwall Project.
2023/2024 Documents
These documents were prepared in 2023 and 2024 for a previous version of the Draft SER/Subsequent MND that was never certified.
The documents in this list may not work with all assistive technology and are being remediated. For alternative formats, please email Tammy Taylor or phone 415-473-7873. To use the California relay service, dial 711.
- Santa Venetia Floodwall - Notice of Availability for 2023 Draft SER (0.02 MB) — The Notice of Availability for the Draft Supplemental Environmental Review and Subsequent Mitigated Negative Declaration for the proposed Santa Venetia Floodwall Project, a supplement to the 2019 Gallinas Levee Upgrade Initial Study/Mitigated Negative Declaration prepared for the project, stating that the public review period begins on Tuesday, December 12, 2023 and ends on Tuesday, January 16, 2024 at 4:00pm.
- Santa Venetia Floodwall - 2023 Draft SER (10.38 MB) — The Draft Supplemental Environmental Review and Subsequent Mitigated Negative Declaration for the proposed Santa Venetia Floodwall Project, a supplement to the 2019 Gallinas Levee Upgrade Initial Study/Mitigated Negative Declaration prepared for the project.
- Santa Venetia Floodwall - 2024 Response to Comments (6.64 MB) — A Response to Comments document prepared to address comments received on the 2023 Draft Supplemental Environmental Review and Subsequent Mitigated Negative Declaration (SER/Subsequent MND), which had a public review period from December 12, 2023 through January 16, 2024. The Response to Comments was prepared in 2024 but not previously released as the related SER/Subsequent MND was never certified.