C123 West Loop Rd over Slough
Harney County, Oregon · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- C123 West Loop Rd over Slough in Harney County, Oregon, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2018, making it 7 years old at the 2025 inventory.
- It carries about 140 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 65 of the 128 inventoried bridges in Harney County rated good (50.8%); 2 (1.6%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (43.63204, -119.07829)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 8 | Very good condition |
Bridge details
| Structure | Steel culvert |
| Length | about 26 ft |
| Location | 012 Mi C121 Foley Drive |
| NBI structure number | 23827 C12300119 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Harney County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 20 (hwy 007) over Silvies River | 1999 | 2,834 | Good |
| US 20 (hwy 007) over Willow Creek | 1993 | 2,792 | Fair |
| US 20 (hwy 007) over Poison Creek(susans Br) | 1966 | 2,332 | Good |
| US 20 (hwy 007) over Foley Slough | 1999 | 2,332 | Good |
| US 20 (hwy 007) over Silver Creek | 1956 | 2,325 | Fair |
| US 20 (hwy 007) over Miller Creek | 2004 | 2,325 | Good |
All bridges nearby: Harney County, OR bridge conditions · every bridge in Harney County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.