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Updated 27 days ago
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Regulatory Flood Map (Bylaw Flood Hazard)

Calgary’s Regulatory Flood Map shows the floodway, flood fringe and overland flood zones. The map is used for land planning purposes, showing the designated flood zones where various development and building regulations apply. The map shows the regulatory flood zones for the Bow River, Elbow River, Nose Creek and West Nose Creek. An annotation file is provided separately as an attachment: (<a href="">Bylaw Flood Hazard Annotations</a>). This map is the 1:100 flood extent calculated in 1983.

Designated flood elevations (or steplines) associated with these zones are available separately.

For more on the development and building regulations that apply in each designated flood zone, please refer to Calgary’s Land Use Bylaw, Part 3 Division 3.

Are you building or renovating?

If you are building or renovating, check the regulatory flood map on this page, and the 1:100 year inundation map (from Flooding in Calgary: Maps to see if your property is in a flood risk zone. Since late 2011, property owners have been advised of both the official designated flood elevation per the Land Use Bylaw (based on this regulatory flood map) and the most up to date recommended flood elevation (based on the updated 1:100 year inundation map) for their specific property.

For Calgary's River Flood story, see:

Querying over HTTP

Splitgraph serves as an HTTP API that lets you run SQL queries directly on this data to power Web applications. For example:

curl \
    -H "Content-Type: application/json" \
{"sql": "
    SELECT *
    FROM \"calgary-ca/regulatory-flood-map-bylaw-flood-hazard-tp6q-x2v7\".\"regulatory_flood_map_bylaw_flood_hazard\"
    LIMIT 100 

See the Splitgraph documentation for more information.

  • regulatory_flood_map_bylaw_flood_hazard
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