City vs city
Rapid City vs Spring Valley Colony, SD
Rapid City currently scores 13 points higher overall than Spring Valley Colony, with the largest gap in hail.
Use this comparison for relocation decisions, insurance shopping, and hazard-prioritized mitigation planning.
Hazard breakdown
Scores describe each city’s reference grid tile, not every property. A missing model is unavailable, not zero risk. Air quality uses an ingested EPA AirNow snapshot and may not reflect current conditions; other factors describe baseline exposure. The overall score blends different hazards and is not a probability of damage. Read the scoring methodology and sources.
Overall
Rapid City: 42/100 · Spring Valley Colony: 29/100
Rapid City is 13 points higher.
Flood
Rapid City: 49/100 · Spring Valley Colony: Unavailable
A score difference cannot be calculated without both sources.
Rapid City: FEMA NFHL flood zones: 5 features intersect this tile.
Spring Valley Colony: Flood model is not available for this location yet.
Wind
Rapid City: 20/100 · Spring Valley Colony: 22/100
Spring Valley Colony is 2 points higher.
Rapid City: Wind exposure derived from ingested design wind / climatology tiles.
Spring Valley Colony: Wind exposure derived from ingested design wind / climatology tiles.
Lightning
Rapid City: 24/100 · Spring Valley Colony: 39/100
Spring Valley Colony is 15 points higher.
Rapid City: Lightning exposure derived from ingested climatology tiles.
Spring Valley Colony: Lightning exposure derived from ingested climatology tiles.
Tornado
Rapid City: 8/100 · Spring Valley Colony: 38/100
Spring Valley Colony is 30 points higher.
Rapid City: Tornado risk derived from NOAA SPC historical reports.
Spring Valley Colony: Tornado risk derived from NOAA SPC historical reports.
Hail
Rapid City: 100/100 · Spring Valley Colony: 42/100
Rapid City is 58 points higher.
Rapid City: Hail risk derived from NOAA SPC historical reports.
Spring Valley Colony: Hail risk derived from NOAA SPC historical reports.
Storm surge
Rapid City: Unavailable · Spring Valley Colony: Unavailable
A score difference cannot be calculated without both sources.
Rapid City: Storm surge model is not available for this location yet.
Spring Valley Colony: Storm surge model is not available for this location yet.
Wildfire
Rapid City: 67/100 · Spring Valley Colony: 35/100
Rapid City is 32 points higher.
Rapid City: Wildfire exposure derived from ingested fire potential tiles.
Spring Valley Colony: Wildfire exposure derived from ingested fire potential tiles.
Ingested air quality
Rapid City: 29/100 · Spring Valley Colony: Unavailable
A score difference cannot be calculated without both sources.
Rapid City: Air quality score derived from the latest ingested EPA AirNow AQI grid; may not reflect current conditions. See methodology for the recorded ingest date.
Spring Valley Colony: Air quality model is not available for this location yet.