Cascade Ave Ext. over Kanaka Creek
Skamania County, Washington · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cascade Ave Ext. over Kanaka Creek in Skamania County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1920 and reconstructed in 1972, making it 105 years old at the 2025 inventory.
- It carries about 72 vehicles a day (traffic count year 2024).
- Its listed owner is a city or municipal highway agency.
- It is one of 54 of the 120 inventoried bridges in Skamania County rated fair (45.0%); 11 (9.2%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- It was rated poor in the 2024 inventory and is now fair (deck 5 to 6, superstructure 4 to 5).
- Its most recent inspection on record is dated August 2024, 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 → (45.69167, -121.88333)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 6 | Satisfactory condition |
| Superstructure | 4 | 5 | Fair condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 33 ft |
| Location | 0.1 South First St. East |
| NBI structure number | 085622000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | August 2024 |
| 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 Skamania County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 14 over Rock CR | 1938 | 6,440 | Fair |
| SR 14 over Bn RR | 1978 | 5,217 | Fair |
| SR 14 over Cascade Drive | 1978 | 5,217 | Fair |
| SR 14 over Cape Horn Slide | 1930 | 4,879 | Fair |
| SR 14 over Half Bridge | 1930 | 4,879 | Poor |
| SR 14 over Duncan CR | 1926 | 4,755 | Fair |
All bridges nearby: Skamania County, WA bridge conditions · every bridge in Skamania County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.