Old 30 Knappa over Big Creek
Good Condition54 years old450 vehicles/day
Location
| State | Oregon |
| County | Clatsop |
| Location | 005 Mi NW HWY 30 |
| Carries | Old 30 Knappa |
| Crosses | Big Creek |
| Coordinates | 46.17183, -123.59145 |
Condition Ratings
| Overall Condition | Good |
| Deck | 8 (Very Good) |
| Superstructure | 8 (Very Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 6 (Satisfactory) |
| Scour Critical | Unknown |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Box Beam - Multiple |
| Total Length | 106.0 ft (32.3 m) |
| Max Span | 105.0 ft (32 m) |
| Deck Width | 24.0 ft (7.3 m) |
| Deck Area | 235.8 sq m |
| Main Spans | 1 |
| Year Built | 1972 |
Traffic
| Avg Daily Traffic | 450 (2020) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 07C04 031400065 |