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Project Details

Study Type:Physical Map Revision
The Federal Emergency Management Agency (FEMA) is performing detailed coastal engineering analyses and mapping of the San Francisco Bay shoreline within the nine San Francisco Bay Area counties. The analysis and mapping will revise and update the flood and wave data for the Marin County Flood Insurance Study report and 49 Flood Insurance Rate Map panels along the San Francisco Bay shoreline.

On January 17, 2013, FEMA conducted a Flood Risk Review meeting in Marin County. At that meeting, FEMA shared the draft work maps with key stakeholders. FEMA solicited and received comments on the work maps from registered stakeholders using an online comment tool. Related project documents from this meeting are located in the menu below.

In October and November of 2013, FEMA shared the draft work maps and study information with communities at four public outreach meetings hosted by Marin County. The draft work maps and the slide presentation from these meetings are located in the menu below.

After careful consideration of all the comments received during the online comment period, the draft work maps were converted to Preliminary Flood Insurance Rate Maps (FIRMs). On March 24, 2014 the Preliminary Flood Insurance Study and the Preliminary Flood Insurance Rate Maps were mailed to the Marin County, City, and Town Chief Executive Officers (CEOs) for the impacted areas noted below.

On April 10, 2014 a Community Consultation Officer meeting will be held with community staff. FEMA has posted digital copies of the revised FIRM panels, FIS report, and Digital FIRM database to the following website:

Shortly, the proposed Flood Hazard Determinations will be published in the Federal Register. Following the publication in the Federal Register, the Flood Hazard Determinations will be published twice in the legal ad section of the Marin Independent Journal.

A 90-day formal appeal period will begin on the second publication in the Marin Independent Journal. For more information on Appeals and Protests to National Flood Insurance Program maps, please visit the FEMA library document posted at:, and amendments by way of FEMA Operating Guidance Procedure Memorandum 57, Expanded Appeals Process.

Individuals and business owners who have questions or comments regarding the Preliminary Flood Insurance Rate Map should contact their local Floodplain Administrator.

Flooding is the most common disaster in the United States. Homeowners, renters and business owners are encouraged to look at the Preliminary Flood Insurance Rate Maps to become familiar with flood risks in their community. These flood maps can help individuals and businesses make informed decisions about flood insurance options and flood protection measures. For more information about flood insurance or to find a local agent, visit

For questions about flood maps, visit, call 877-FEMA-MAP (877-336-2627) or email
Impacted Areas:Cities of Belvedere, Larkspur, Mill Valley, Novato, San Rafael, and Sausalito; Towns of Corte Madera and Tiburon; Marin County Unincorporated Areas
Major Flooding Sources:San Francisco Bay

 Project Documents

Document NameDocument Date
expand Fact Sheet
City of Belvedere Fact Sheet4/16/2014
City of Mill Valley Fact Sheet4/3/2014
City of San Rafael Fact Sheet4/3/2014
Las Gallinas, Marin County Unincorporated Fact Sheet4/3/2014
Marin County Post Preliminary Fact Sheet4/8/2014
Paradise Cay, Marin County Unincorporated Fact Sheet4/3/2014
expand Letter
Study Update Letter_Belvedere 4.16.134/16/2013
Study Update Letter_Larkspur 4.16.134/16/2013
Study Update Letter_Mill Valley 4.16.134/16/2013
Study Update Letter_San Rafael 4.16.134/16/2013
Study Update Letter_Tiburon 4.16.134/16/2013
expand Minutes
expand Presentation
Marin County Consultation Cooridination Officer Meeting4/14/2014
Marin_SF BAC Study Outreach Meeting_November 201311/19/2013
expand SOMA
City of Larkspur Preliminary SOMA
City of Novato Preliminary SOMA
City of Sausilito Preliminary SOMA
Town of Corte Madera Preliminary SOMA

 Other FEMA Risk Map projects


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