470 South Road over Milner Gooding Canal
Lincoln County, Idaho · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 470 South Road over Milner Gooding Canal in Lincoln 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 1985, making it 40 years old at the 2025 inventory.
- It carries about 80 vehicles a day (traffic count year 2023).
- It is one of 23 of the 53 inventoried bridges in Lincoln County rated fair (43.4%); 14 (26.4%) 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 2023, 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 → (42.86508, -114.26508)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete multiple box beam |
| Length | about 83 ft |
| Location | 3.1 S. Dietrich |
| NBI structure number | 000000000024990 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| 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 Lincoln County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 75 over Little Wood River | 1958 | 7,700 | Good |
| SH 75 over Milner Gooding Canal | 2013 | 5,000 | Good |
| SH 75 over Big Wood River | 2013 | 5,000 | Fair |
| SH 75 over Big Wood River | 1955 | 4,500 | Fair |
| SH 75 over North Gooding Canal | 2013 | 4,400 | Good |
| US 93 over Little Wood River | 1987 | 2,300 | Fair |
All bridges nearby: Lincoln County, ID bridge conditions · every bridge in Lincoln County · Idaho bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.