SR 20 over Bonaparte Creek
Fair Condition93 years old1,755 vehicles/day
Location
| State | Washington |
| County | Okanogan |
| Location | 0.9 E Jct US 97 |
| Carries | SR 20 |
| Crosses | Bonaparte Creek |
| Coordinates | 48.69456, -119.42808 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 9 — Foundation above flood level |
Physical Characteristics
| Material | Concrete |
| Design | Arch - Deck |
| Total Length | 118.1 ft (36 m) |
| Max Span | 87.9 ft (26.8 m) |
| Deck Width | 26.9 ft (8.2 m) |
| Deck Area | 295.2 sq m |
| Main Spans | 1 |
| Year Built | 1933 |
Traffic
| Avg Daily Traffic | 1,755 (2023) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 0001738A0000000 |