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Floodplain Cross Sections

Published by City of Washington, DC | District of Columbia | Catalog Last Checked: May 05, 2026 at 10:36 PM | Dataset Last Updated: April 11, 2025 at 12:00 AM
Location and attributes for cross section lines in the area covered by the FIRM. This layer must contain all cross sections in a model, not just the lettered cross sections. A line developed from topographic information across a floodplain at which a computation of flood flow has been made to establish a potential flood elevation. Cross sections are shown on the Flood Boundary Floodway Map, Flood Insurance Rate Map, and/or Flood Profiles of a Flood Insurance Study.

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