SR 31 over Slate Creek
Fair Condition93 years old146 vehicles/day
Location
| State | Washington |
| County | Pend Oreille |
| Location | 21.1 N Jct SR 20 |
| Carries | SR 31 |
| Crosses | Slate Creek |
| Coordinates | 48.92919, -117.30709 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Girder and Floorbeam |
| Total Length | 215.9 ft (65.8 m) |
| Max Span | 80.1 ft (24.4 m) |
| Deck Width | 30.2 ft (9.2 m) |
| Deck Area | 605.4 sq m |
| Main Spans | 1 |
| Year Built | 1933 |
Traffic
| Avg Daily Traffic | 146 (2023) |
| Truck Traffic | 18% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0001745A0000000 |