SR 4 over Skamokawa Creek
Wahkiakum County, Washington · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 4 over Skamokawa Creek in Wahkiakum 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 1939, making it 86 years old at the 2025 inventory.
- It carries about 1,573 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 16 of the 37 inventoried bridges in Wahkiakum County rated fair (43.2%); 1 (2.7%) are rated poor.
- 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 → (46.27039, -123.45672)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 5 | Fair condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Steel girder and floorbeam |
| Length | about 238 ft |
| Location | 24.2 E Jct SR 401 |
| NBI structure number | 0002457A0000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.
Busiest bridges in Wahkiakum County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 4 over Elochoman River | 1955 | 2,084 | Fair |
| SR 4 over Tide Gate Culvert | 2015 | 2,084 | Good |
| SR 409 over Columbia R Puget Island | 1938 | 1,973 | Fair |
| SR 4 over Deep River | 1990 | 1,509 | Good |
| SR 4 over Rangila Slough | 1990 | 1,509 | Good |
| SR 4 over W Fk Skamokawa CR | 1938 | 1,255 | Fair |
All bridges nearby: Wahkiakum County, WA bridge conditions · every bridge in Wahkiakum County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.