SR 508 over Tilton River
Good Condition32 years old1,200 vehicles/day
Location
| State | Washington |
| County | Lewis |
| Location | 28.5 E Jct I-5 |
| Carries | SR 508 |
| Crosses | Tilton River |
| Coordinates | 46.58472, -122.34908 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 352.0 ft (107.3 m) |
| Max Span | 109.9 ft (33.5 m) |
| Deck Width | 30.8 ft (9.4 m) |
| Deck Area | 1008.6 sq m |
| Main Spans | 4 |
| Year Built | 1994 |
Traffic
| Avg Daily Traffic | 1,200 (2023) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 0014208A0000000 |