IRR BIA RTE 18 over Boulder Creek
Good Condition46 years old50 vehicles/day
Location
| State | Washington |
| County | Grays Harbor |
| Location | 4 Km S Of Amanda Park Jct |
| Carries | IRR BIA RTE 18 |
| Crosses | Boulder Creek |
| Coordinates | 47.42814, -123.91425 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 75.1 ft (22.9 m) |
| Max Span | 71.9 ft (21.9 m) |
| Deck Width | 26.9 ft (8.2 m) |
| Deck Area | 187.8 sq m |
| Main Spans | 1 |
| Year Built | 1980 |
Traffic
| Avg Daily Traffic | 50 (2021) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | Bureau of Indian Affairs |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 00000000000P012 |