Flood Zone Comparison
Compare key metrics between 57370 57370, SD — Zone AE and 57520 57520, SD — Zone A. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 57370 57370, SD — Zone AE | 57520 57520, SD — Zone A |
|---|---|---|
| name | 57370 57370, SD — Zone AE | 57520 57520, SD — Zone A |
| zip code | 57370 | 57520 |
| city | 57370 | 57520 |
| state | South Dakota | South Dakota |
| state code | SD | SD |
| category | High Risk | High Risk |
| flood zone | Zone AE (High Risk — 100-Year Floodplain) | Zone A (High Risk — 100-Year Floodplain, No BFE) |
| risk level | High Risk | High Risk |
| annual flood prob | 1% annual chance (100-year flood) | 1% annual chance (100-year flood) |
| insurance required | Required for federally-backed mortgages | Required for federally-backed mortgages |
| avg annual premium | 2,579 | 2,579 |
| base flood elevation | 27 ft | 24 ft |
| historical floods | 9 recorded flood events in the past 50 years. Most recent major flood: 2024 | 1 recorded flood events in the past 50 years. Most recent major flood: 2024 |
| nearest water | Rio Grande (1.8 miles) | Columbia River (2.5 miles) |
| elevation ft | 974 | 1,846 |
| population | 33,789 | 32,400 |
| median home value | 608,417 | 752,154 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $39,966 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $125,798 |
| mitigation tips | Elevate utilities above base flood elevation; install sump pumps with battery backup; consider flood-proofing ground floor; maintain flood insurance; create an emergency evacuation plan; store important documents above flood level. | Elevate utilities above base flood elevation; install sump pumps with battery backup; consider flood-proofing ground floor; maintain flood insurance; create an emergency evacuation plan; store important documents above flood level. |
| fema map id | 1208C231J | 7100C618J |
| last updated | 2025-01-01 | 2025-01-01 |
Our team analyzes data from FEMA National Flood Hazard Layer to deliver accurate, up-to-date information. All data is verified and cross-referenced with official sources.