Northwest Blvd over Cso Tank #6 Shadle Bluff
Spokane County, Washington · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Northwest Blvd over Cso Tank #6 Shadle Bluff in Spokane County, Washington, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2015, making it 10 years old at the 2025 inventory.
- It carries about 11,844 vehicles a day (traffic count year 2022).
- Its listed owner is a city or municipal highway agency.
- It is one of 156 of the 309 inventoried bridges in Spokane County rated good (50.5%); 21 (6.8%) 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 → (47.69233, -117.4656)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 143 ft |
| Location | NWBlvd |
| NBI structure number | 088796000000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.
Busiest bridges in Spokane County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-90 over S Havana St | 1957 | 62,117 | Fair |
| I-90 over S Altamont St | 1957 | 58,628 | Good |
| I-90 over Sprague Ave | 2000 | 51,385 | Fair |
| I-90 over UPRR | 2000 | 51,385 | Good |
| I-90 over Sprague Ave | 2001 | 51,385 | Good |
| I-90 over UPRR | 2001 | 51,385 | Good |
All bridges nearby: Spokane County, WA bridge conditions · every bridge in Spokane County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.