SR 525 over Possession Sound
Island County, Washington · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 525 over Possession Sound in Island County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2000 and reconstructed in 2003, making it 25 years old at the 2025 inventory.
- It carries about 13,078 vehicles a day (traffic count year 2010).
- Its listed owner is the state highway agency.
- It is one of 5 of the 7 inventoried bridges in Island County rated fair (71.4%); 0 (0.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated good in the 2024 inventory and is now fair (substructure 7 to 6).
- Its most recent inspection on record is dated June 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 → (47.975, -122.34833)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 615 ft |
| Location | 1.9 N Jct SR 526 |
| NBI structure number | 0015461A0000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 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 Island County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 20 over State Park Road/trail | 1935 | 18,797 | Good |
| SR 20 over Deception Pass | 1935 | 18,797 | Fair |
| SR 525 over Possession Sound | 1987 | 12,000 | Fair |
| SR 20 Extension over Keystone Harbor | 1979 | 1,863 | Fair |
| SR 525 over Possession Sound | 2003 | 1,078 | Good |
| E. Pioneer Way over Drainage Basin | 2006 | 30 | Fair |
All bridges nearby: Island County, WA bridge conditions · every bridge in Island County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.