The Federal Emergency Management Agency (FEMA) created digital Flood Insurance Rate Maps (dFIRMs) that replaced the paper maps, which were previously used to determine which properties are affected by the mapped 100-Year Floodplain. These new dFIRMs took effect on June 2, 2011. In order to continue to participate in the National Flood Insurance Program (NFIP), the City of Corvallis was required to complete the following two tasks by June 2, 2011 (participation in the NFIP provides significantly lower flood insurance rates for affected property owners):
  1. Amend the City of Corvallis Land Development Code to bring it into full compliance with federal floodplain regulations. This task was the subject of a February 2, 2011, Planning Commission public hearing and an April 4, 2011, City Council public hearing. The revisions that were reviewed as part of these public hearings are contained in Ordinance 2011-01 (this 4.3 MB PDF download includes ALL proposed Land Development Code revisions).

    On April 4, 2011, the City Council approved the Land Development Code Text Amendment (LDT10-00001), subject to the adoption of formal findings and an ordinance. The Council approved the Text Amendment inclusive of the changes recommended by the Planning Commission. The Council made no further changes. Ordinance 2011-01, which includes the formal findings and full package of Land Development Code changes, was adopted by the City Council on April 18, 2011. This task is done and the City Council's decision is outlined in its Notice of Disposition (Order 2011-017) and can be viewed here. These Land Development Code changes became effective on June 2, 2011. The Land Development Code revisions can be viewed here.
  2. Implement the new FEMA floodplain maps. This task was not part of the public hearing processes because the City’s Land Development Code requires use of the most current FEMA Flood Insurance Rate Maps (FIRMs) as part of the City’s floodplain management program. The FEMA process for public review and comment on the FIRMs is completed. The new maps, as well as the associated FEMA scientific engineering report entitled "Flood Insurance Study for Benton County, Oregon and Incorporated Areas” (with effective date of June 2, 2011) are now available here:

    FEMA Studies:

    Corvallis Land Development Code Floodplain Protections


* To properties that are partially or wholly within the 100-year Floodplain on the new FEMA Maps.
To properties that contain streams, but are in areas where no FEMA study has yet been done. Since there is a potential that 100-year Floodplain exists on these properties, federal Floodplain regulations require further study in conjunction with future development to determine the extent of any 100-year Floodplain boundaries. No floodplain study would be required if a property owner desires only to maintain existing development on a site.

    • For questions about topics in this notice, contact the Planning Division, (541) 766-6908, or via email.
    • For Floodplain Map questions, contact Lisa Franklin, Civil Engineer I, (541) 766-6929, or via email.

    Mailing Address: City of Corvallis, Planning Division, P.O. Box 1083, Corvallis, OR 97339
    Office Location: City Hall, 501 SW Madison Avenue, Corvallis, OR 97333
  3. Helpful FEMA website links:

    For general Flood Insurance Rate Map information, please access this FEMA website -

    For information related to flood insurance, including access to a list of Frequently Asked Questions and a way to locate flood insurance agents, please click on this FEMA website -

    For information related to the FEMA processes for Letter of Map Amendment (LOMA) and Letter of Map Revision (LOMR), please click on this FEMA website -

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Last updated: 2/26/2016 9:15:11 AM