US 12 over Patit Creek
Columbia County, Washington · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 12 over Patit Creek in Columbia County, Washington, 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 1933, making it 92 years old at the 2025 inventory.
- It carries about 2,218 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 39 of the 86 inventoried bridges in Columbia County rated fair (45.3%); 9 (10.5%) 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 February 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 → (46.32714, -117.97431)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 43 ft |
| Location | 8.4 E Walla Wal Co |
| NBI structure number | 0001687C0000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2023 |
| Inspection interval (item 91) | 24 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 Washington department of transportation.
Busiest bridges in Columbia County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 12 over Touchet River | 1966 | 5,627 | Good |
| US 12 over Touchet River | 1966 | 4,556 | Good |
| US 12 over Warehouse Yard | 1933 | 2,442 | Poor |
| US 12 over UPRR | 1977 | 2,442 | Fair |
| US 12 over Whetstone Creek | 2021 | 1,993 | Good |
| US 12 over Tucannon River | 1967 | 1,884 | Poor |
All bridges nearby: Columbia County, WA bridge conditions · every bridge in Columbia County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.