Road over Little Tucannon River
Columbia County, Washington · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Road over Little Tucannon River in Columbia County, Washington, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2010, making it 15 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 1989).
- It is one of 38 of the 86 inventoried bridges in Columbia County rated good (44.2%); 9 (10.5%) 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 → (46.22858, -117.72385)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Concrete frame |
| Length | about 28 ft |
| Location | Junc Rd 47/4620 |
| NBI structure number | 061404000014483 |
| Condition class | Good |
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 Patit Creek | 1933 | 2,218 | Fair |
| US 12 over Whetstone Creek | 2021 | 1,993 | Good |
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.