Flood Zone Comparison
Compare key metrics between 50475 50475, IA — Zone A and 98628 98628, WA — Zone AE. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 50475 50475, IA — Zone A | 98628 98628, WA — Zone AE |
|---|---|---|
| name | 50475 50475, IA — Zone A | 98628 98628, WA — Zone AE |
| zip code | 50475 | 98628 |
| city | 50475 | 98628 |
| state | Iowa | Washington |
| state code | IA | WA |
| category | High Risk | High Risk |
| flood zone | Zone A (High Risk — 100-Year Floodplain, No BFE) | Zone AE (High Risk — 100-Year Floodplain) |
| 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 | 2,775 | 2,775 |
| base flood elevation | 14 ft | 22 ft |
| historical floods | 4 recorded flood events in the past 50 years. Most recent major flood: 2014 | 9 recorded flood events in the past 50 years. Most recent major flood: 2020 |
| nearest water | retention pond (1.8 miles) | local creek (0.4 miles) |
| elevation ft | 1,985 | 1,430 |
| population | 44,379 | 69,328 |
| median home value | 734,995 | 252,375 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $138,122 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $60,643 |
| 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 | 4637C403J | 8449C905J |
| 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.