N 175 E Rd over Eagle Rock Cnl Headgate
Jefferson County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- N 175 E Rd over Eagle Rock Cnl Headgate in Jefferson County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1997, making it 28 years old at the 2025 inventory.
- It carries about 40 vehicles a day (traffic count year 2023).
- It is one of 97 of the 125 inventoried bridges in Jefferson County rated fair (77.6%); 4 (3.2%) are rated poor.
- 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 → (43.62833, -111.68578)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 38 ft |
| Location | 0.2 S. 4.4 E. Ririe |
| NBI structure number | 000000000032351 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Jefferson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 20 over Garfield Ucon Canal | 1972 | 34,500 | Fair |
| US 20 over Burgess Canal | 1975 | 28,500 | Fair |
| US 20 Eb-wb over SH 48;RIGBY Gs | 1976 | 28,500 | Fair |
| US 20 Ebl & Wbl over Parks Lewisville Canal | 1975 | 19,500 | Fair |
| US 20 Ebl over Snake River;lorenzo Br. | 1980 | 15,250 | Fair |
| US 20 Wbl over Snake River;lorenzo Br. | 1974 | 15,250 | Fair |
All bridges nearby: Jefferson County, ID bridge conditions · every bridge in Jefferson County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.