Name: FEMA 100-Yr Floodplain (1% Annual Chance)

Display Field: DFIRM_ID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The National Flood Hazard Layer (NFHL) contains current effective flood hazard data. It is a compilation of effective Flood Insurance Rate Maps (FIRM) databases and Letters of Map Revision (LOMRs). FEMA provides the flood hazard data to support the National Flood Insurance Program. This information can be used to better understand the level of flood risk and type of flooding in a given location. The NFHL can also be used in place of the FIRM for NFIP purposes with appropriate care. More information can be found on the FEMA website: https://www.fema.gov/flood-maps/national-flood-hazard-layerJefferson County Planning and Zoning downloaded this dataset in October of 2026 and processed it for use in local web mapping applications. To identify the 100-year flood zones, zones 'A', 'AE', 'AH', and 'AO' were queried. Data Type: Static.Vintage: October 2026 from the Federal Emergency Management Agency (FEMA).Data are in State Plane Grid Coordinates, Colorado Central Zone, NAD83.

Service Item Id: d2f623c516964198be0db89465456d4b

Copyright Text: Credit the Federal Emergency Management Agency (FEMA) in any use of this data.

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Supported Query Formats: JSON, geoJSON, PBF

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Extent:

XMin: -1.17328627251E7
YMin: 4740257.8928999975
XMax: -1.16871930405E7
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Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

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UniqueValueInfos:
• Value: A
  Label: A - No Base Flood Elevations determined
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• Value: AE
  Label: AE - Base Flood Elevations determined
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• Value: AH
  Label: AH - Base Flood Elevations determined
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• Value: AO
  Label: AO - Average depths determined
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Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• DFIRM_ID ( type: esriFieldTypeString, alias: DFIRM_ID, length: 6 )
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Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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