Flood Zone Comparison
Compare key metrics between 61431 61431, IL — Zone A and 80303 80303, CO — Zone AE. Data sourced from FEMA National Flood Hazard Layer (2025).
| Metric | 61431 61431, IL — Zone A | 80303 80303, CO — Zone AE |
|---|---|---|
| name | 61431 61431, IL — Zone A | 80303 80303, CO — Zone AE |
| zip code | 61431 | 80303 |
| city | 61431 | 80303 |
| state | Illinois | Colorado |
| state code | IL | CO |
| 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 | 2,511 | 2,511 |
| base flood elevation | 7 ft | 19 ft |
| historical floods | 6 recorded flood events in the past 50 years. Most recent major flood: 2004 | 12 recorded flood events in the past 50 years. Most recent major flood: 2013 |
| nearest water | Savannah River (3.1 miles) | Lake Huron (5.0 miles) |
| elevation ft | 1,326 | 7,296 |
| population | 30,656 | 58,452 |
| median home value | 527,056 | 149,553 |
| flood damage risk | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $69,253 | 40-60% chance of flood damage over a 30-year mortgage. Estimated average damage per flood event: $44,481 |
| 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 | 1148C331J | 5511C721J |
| 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.