400 East Road over U Canal
Jerome County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 400 East Road over U Canal in Jerome County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1981, making it 44 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2023).
- It is one of 81 of the 111 inventoried bridges in Jerome County rated fair (73.0%); 10 (9.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 6 to 8, superstructure 6 to 7.
- Its most recent inspection on record is dated November 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (42.77061, -114.44358)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 8 | Very good condition |
| Superstructure | 6 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 60 ft |
| Location | 3.3 N. 4.0 E. Jerome |
| NBI structure number | 000000000024665 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Jerome County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 84 over N Canal | 1966 | 24,500 | Fair |
| I 84 over C Canal | 1966 | 23,000 | Fair |
| SH 79 over I 84 Eb-wb;s.jerome Ic | 1966 | 15,000 | Fair |
| I 84 Ebl over 400 South Rd Gs 2 | 2024 | 14,500 | Good |
| I 84 Wbl over 400 South Rd Gs 2 | 2024 | 14,500 | Good |
| I 84 Ebl over US 93;W. Twin Falls Ic | 2013 | 14,500 | Fair |
All bridges nearby: Jerome County, ID bridge conditions · every bridge in Jerome County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.