SH 25 over Snake River;downard Br
Minidoka County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 25 over Snake River;downard Br in Minidoka County, Idaho, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1994, making it 31 years old at the 2025 inventory.
- It carries about 2,600 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 45 of the 67 inventoried bridges in Minidoka County rated fair (67.2%); 1 (1.5%) 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 March 2022, on a 48-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 → (42.5825, -113.6275)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 1,123 ft |
| Location | 5.2 E. Rupert |
| NBI structure number | 000000000013086 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2022 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Idaho department of transportation.
Busiest bridges in Minidoka County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I84 Ebl Wbl over B-4 Canal | 2024 | 22,000 | Good |
| I 84 Ebl over Shodde Road Gs | 1966 | 11,000 | Fair |
| I 84 Wbl over Shodde Road Gs | 1966 | 11,000 | Fair |
| I 84 Ebl over B-4 Canal | 1966 | 11,000 | Fair |
| I 84 Ebl over I 84B;UPRR;HEYBURN Ic | 1961 | 10,500 | Fair |
| I 84 Wbl over I 84B;UPRR;HEYBURN Ic | 1961 | 10,500 | Fair |
All bridges nearby: Minidoka County, ID bridge conditions · every bridge in Minidoka County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.