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Posted on: December 6, 2016

Board of Supervisors to Consider Proposed Changes to Floodplain Boundaries

image of proposed flood overlay district map
Loudoun County is planning to send out an estimated 8,200 letters next week notifying property owners that they may be affected by proposed modifications to the county’s Floodplain Overlay District. The notification letters include information about an upcoming Board of Supervisors public hearing on the proposed changes. 

The Floodplain Overlay District boundary revisions are necessary in order for Loudoun County to continue to participate in the National Flood Insurance Program, which is administered by the Federal Emergency Management Agency (FEMA). The program provides homeowners, business owners and renters with the ability to purchase federally-backed flood insurance. 

As part of the National Flood Insurance Program, FEMA has updated the county’s Flood Insurance Rate Map and Flood Insurance Study, which were last revised in 2001. The Flood Insurance Rate Map is FEMA’s official map that shows the county’s flood hazard areas. The Flood Insurance Study provides data and analysis for specific flood hazard areas within the county. Loudoun County must adopt FEMA’s new Flood Insurance Rate map and Flood Insurance study or be suspended from participation in the insurance program. 

Following a public hearing in November, the Planning Commission forwarded the proposed changes to the Floodplain Overlay District to the Board of Supervisors with a recommendation of approval. The Board is scheduled to hold a public hearing on the matter in January. The documents associated with the item before the Board will be posted prior to the meeting and will be available online at www.loudoun.gov/BosDocuments

The proposed Floodplain Overlay District affects in whole or in part about 3,600 parcels of land, or 21,000 acres, in the major floodplain and about 4,600 parcels, or 8,900 acres in the minor floodplain.  The floodplain includes lands adjacent and near any stream that drains an area of 100 acres or more.

An interactive map of the proposed Floodplain Overlay District that allows the user to search by parcel identification number (PIN) is available at www.loudoun.gov/FODZMap. The PIN is included in the notification letter. Property owners also can find their parcel identification number at www.loudoun.gov/ParcelDatabase.

For questions about the proposed revisions to the Floodplain Overlay District, call the Floodplain Help Line at 703-737-8746 or send an email

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