The Flood Insurance Rate Map (FIRM) for the area inside the Sauvie Island levee system is being revised.
- Webmap: Sauvie Island Flood Zone Map
- DRAFT Sauvie Island Flood Inundation Maps (50.91 MB)
Public Meeting
An online virtual public meeting was held 6:00 p.m. on November 9, 2022 to present information about proposed FIRM revisions required for federal accreditation of the Sauvie Island flood protection levee, followed by a virtual question and answer session.
The following topics were covered:
- Flood Modeling & Levee Accreditation Process Questions
- Insurance Questions
- County Flood Hazard Permitting Questions
- Other Questions
Presentations from the public meeting:
- OVERVIEW PRESENTATION - Overview - SI Levee Accreditation (712.01 KB)
- TECHNICAL PRESENTATION - SIDIC Modeling and Mapping (2.67 MB)
If you'd like to access a video of the virtual public meeting, please request it at sileveeaccreditation@multco.us.
About the Project
The FIRM for a community depicts the floodplain which is the area that has been determined to be subject to a 1-percent or greater chance of flooding in any given year (also referred to as the 1-percent annual-chance flood and the 100-year flood). The FIRM is used to determine flood insurance rates and to help the community with floodplain management.
The Sauvie Island Levee system is in the process of being accredited by the Federal Emergency Management Agency (FEMA) as meeting specific federal design, operation and maintenance standards which reduce flood risk. In January 2019, Multnomah County received the final report from the US Army Corps of Engineers certifying the Sauvie Island levee system for 10 years and recommending to FEMA to maintain levee accreditation status.
Multnomah County is required as part of the federal levee accreditation process to submit a Letter of Map Revision (LOMR) application to FEMA to include consideration of new flood data for lands inside Sauvie Island levee system. These FIRM revisions are based on best available data and analysis by a professional engineer and will be reviewed by FEMA. Concerns with the proposed revisions can be considered during the 90-day public comment period. Maps showing the FIRM revisions can be reviewed online.
- Webmap: Review the FIRM revisions
Multnomah County anticipates final map adoption in 2023 and there are many steps in the process that will occur prior to map adoption. Those with questions are encouraged to attend the first virtual meeting to learn more. Please also see the Frequently Asked Questions (FAQ) related to Flood Insurance Rate Maps.
Other Resources
- Common questions about flood maps and risk (141.39 KB)
- Cheaper Flood Insurance Brochure (3.26 MB)
- Chapter 39 - Zoning Code (4.89 MB)Multnomah County Flood Hazard Regulations (Multnomah County Code Sections 39.5000 – 39.5055):
- Chapter 7 - Natural Hazards (14.47 MB)
- Multnomah County Emergency Management Flooding and Landslides Page
- Sauvie Island Drainage Company
Contact Us
Comments and questions can be submitted to sileveeaccreditation@multco.us.
