US 97 over Siwash Creek
Good Condition78 years old4,282 vehicles/day
Location
| State | Washington |
| County | Okanogan |
| Location | 0.6 N Jct SR 20 |
| Carries | US 97 |
| Crosses | Siwash Creek |
| Coordinates | 48.71135, -119.43586 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 51.8 ft (15.8 m) |
| Max Span | 49.9 ft (15.2 m) |
| Deck Width | 36.1 ft (11 m) |
| Deck Area | 173.8 sq m |
| Main Spans | 1 |
| Year Built | 1948 |
Traffic
| Avg Daily Traffic | 4,282 (2023) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0003403A0000000 |