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The original item was published from 2/15/2023 3:10:17 PM to 5/22/2023 11:34:36 AM.

News Flash


Posted on: February 15, 2023

[ARCHIVED] New floodplain maps available online

City of Spearfish

SPEARFISH, SD - FEMA (Federal Emergency Management Agency) recently completed a re-evaluation of the flood hazards in our community and has provided new Flood Insurance Rate Maps (FIRM’s) and Flood Insurance Study (FIS) report which are effective March 22, 2023. The new floodplain mapping is based on updated topographic, and in some cases, revised hydrologic and hydraulic analysis.

Floodplain maps are periodically updated and revised to reflect changing condition, such as impacts of flooding, new topography, land development, updated mapping studies, and construction of floodplain improvements. 

Visit to see the maps presented at the community meetings and showing the comparison of the old and new floodplain, under “Floodplain Map Changes.”

To download and view the official FEMA revised map (effective March 22, 2023), visit FEMA Flood Map Service Center’s map of Spearfish here. Under “Changes to this FIRM,” click on “Revisions,” and then click on the icon with the green arrow and DL (download) after the third option (with the date of 03/22/2023). 

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