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Fathom Flood Hazard Extent 1% AEP (100-yr)

Virginia Department of Conservation and Recreation

Updated Oct 19, 2026

About this dataset

Fathom is a 3rd party flood hazard data provider with a comprehensive dataset of flood hazards including coastal, fluvial, and pluvial flooding. This layer represent a combined floodplain with the three major sources of flooding combined into one extent. Non-regulatory flood hazard extent based on Fathom 10-meter depth grid for baseline (2020).  Public layers include the 1% and 0.2% Annual Exceedance Probability.

Data and resources (6)

Prototype by Datopian · not an official government website · data from data.virginia.gov