Lost River Rd over Methow River
Okanogan County, Washington · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lost River Rd over Methow River in Okanogan County, Washington, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1972, making it 53 years old at the 2025 inventory.
- It carries about 1,057 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 74 of the 161 inventoried bridges in Okanogan County rated fair (46.0%); 12 (7.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 6 to 7.
- Its most recent inspection on record is dated September 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 → (48.59026, -120.40702)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 7 | Good condition |
Bridge details
| Structure | Continuous prestressed concrete stringer or multi-beam girder |
| Length | about 214 ft |
| Location | .nese S25 T36 R19 |
| NBI structure number | 083318000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Washington department of transportation.
Busiest bridges in Okanogan County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 97 over Okanogan River | 1964 | 8,828 | Fair |
| US 97 over SR 155 | 1964 | 8,828 | Poor |
| US 97 over Gn Rr-county Road | 1964 | 7,453 | Good |
| SR 155 Spur over Okanogan River | 1923 | 5,987 | Fair |
| US 97 over Bonaparte CR | 1957 | 5,771 | Good |
| US 97 over Watson Draw | 1965 | 5,644 | Poor |
All bridges nearby: Okanogan County, WA bridge conditions · every bridge in Okanogan County · Washington bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.