SR 508 over Alder Creek
Fair Condition89 years old1,200 vehicles/day
Location
| State | Washington |
| County | Lewis |
| Location | 22.7 E Jct I-5 |
| Carries | SR 508 |
| Crosses | Alder Creek |
| Coordinates | 46.60428, -122.45108 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 3 — Scour critical |
Physical Characteristics
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 87.9 ft (26.8 m) |
| Max Span | 28.9 ft (8.8 m) |
| Deck Width | 21.0 ft (6.4 m) |
| Deck Area | 171.5 sq m |
| Main Spans | 3 |
| Year Built | 1937 |
Traffic
| Avg Daily Traffic | 1,200 (2023) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 224 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 000000CQ0000000 |