Flood Zone Comparison
Compare key metrics between 18660 18660, PA — Zone X-shaded and 57076 57076, SD — Zone X-shaded. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 18660 18660, PA — Zone X-shaded | 57076 57076, SD — Zone X-shaded |
|---|---|---|
| name | 18660 18660, PA — Zone X-shaded | 57076 57076, SD — Zone X-shaded |
| zip code | 18660 | 57076 |
| city | 18660 | 57076 |
| state | Pennsylvania | South Dakota |
| state code | PA | SD |
| category | Moderate Risk | Moderate Risk |
| flood zone | Zone X-shaded (Moderate Risk — 500-Year Floodplain) | Zone X-shaded (Moderate Risk — 500-Year Floodplain) |
| risk level | Moderate Risk | Moderate Risk |
| annual flood prob | 0.2% annual chance (500-year flood) | 0.2% annual chance (500-year flood) |
| insurance required | Recommended but not required | Recommended but not required |
| avg annual premium | 655 | 655 |
| base flood elevation | N/A — not in Special Flood Hazard Area | N/A — not in Special Flood Hazard Area |
| historical floods | 15 recorded flood events in the past 50 years. Most recent major flood: 2024 | 9 recorded flood events in the past 50 years. Most recent major flood: 2022 |
| nearest water | Columbia River (2.8 miles) | Arkansas River (4.4 miles) |
| elevation ft | 465 | 814 |
| population | 38,884 | 59,400 |
| median home value | 396,466 | 472,632 |
| flood damage risk | 15-30% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $150,958 | 15-30% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $165,923 |
| mitigation tips | Consider purchasing flood insurance even though not required; install backflow preventers on sewer lines; grade your lot to direct water away from foundation; keep gutters and drainage clear; know your evacuation route. | Consider purchasing flood insurance even though not required; install backflow preventers on sewer lines; grade your lot to direct water away from foundation; keep gutters and drainage clear; know your evacuation route. |
| fema map id | 1759C891J | 7250C230J |
| 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.