Stc 3809;MIDDLE Fk over Yuba River
Elmore County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Stc 3809;MIDDLE Fk over Yuba River in Elmore County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1965, making it 60 years old at the 2025 inventory.
- It carries about 30 vehicles a day (traffic count year 2023).
- It is one of 65 of the 98 inventoried bridges in Elmore County rated fair (66.3%); 8 (8.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 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 → (43.80022, -115.15836)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 79 ft |
| Location | 0.2 S. 1.2 W. Atlanta |
| NBI structure number | 000000000028000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Elmore County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 84 Ebl over Squaw Creek | 1953 | 14,250 | Fair |
| I 84 Wbl over Squaw Creek | 1960 | 14,250 | Fair |
| I 84 Ebl over Canyon Creek | 1959 | 14,250 | Good |
| I 84 Wbl over Canyon Creek | 1959 | 14,250 | Fair |
| I 84 Wbl over US 20;N.MOUNTAIN Home Ic | 1971 | 10,750 | Fair |
| I 84 Ebl over US 20;N.MOUNTAIN Home Ic | 1971 | 10,750 | Fair |
All bridges nearby: Elmore County, ID bridge conditions · every bridge in Elmore County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.