Bridge conditions in Madison County, Idaho
80 inventoried bridges · 0 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Madison County is one of the counties with a clean sheet: 80 bridges on the federal inventory and not one rated poor. 54 carry a fair rating, which means wear worth watching but no structural deficiency.
- 0 of the 80 bridges in Madison County, Idaho, are rated in poor condition (0.0%) in the 2025 National Bridge Inventory, as of .
- 26 bridges (32.5%) are rated good and 54 (67.5%) fair.
- The median Madison County bridge was built in 1978.
Good 32.5% · Fair 67.5% · Poor 0.0% of 80 bridges
Bridges rated poor
No bridges in this county carry a poor rating in the current inventory.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 33 over Rexburg Canal | 1938 | 20,000 | Fair |
| SH 33 over S.fk.teton River | 1971 | 17,000 | Fair |
| US 20 Ebl over Stp 7726;S.REXBURG Ic | 1981 | 15,750 | Good |
| US 20 Wbl over Stp 7726;S.REXBURG Ic | 1981 | 15,750 | Good |
| US 20 Ebl over Texas Slough | 1981 | 15,250 | Good |
| US 20 Wbl over Texas Slough | 1981 | 15,250 | Good |
| US 20 Ebl over Thorton Ic | 2016 | 15,250 | Good |
| US 20 Wbl over Thorton Ic | 2016 | 15,250 | Good |
| US 20 Ebl over SH 33;REXBURG Ic | 1981 | 12,000 | Good |
| US 20 Wbl over SH 33;REXBURG Ic | 1981 | 12,000 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Idaho: Idaho bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.