SR 20 over Colonial Creek
Good Condition65 years old1,322 vehicles/day
Location
| State | Washington |
| County | Whatcom |
| Location | 13.4 E Skagit Co |
| Carries | SR 20 |
| Crosses | Colonial Creek |
| Coordinates | 48.69061, -121.10425 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete Continuous |
| Design | Tee Beam |
| Total Length | 115.2 ft (35.1 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 30.5 ft (9.3 m) |
| Deck Area | 326.4 sq m |
| Main Spans | 3 |
| Year Built | 1961 |
Traffic
| Avg Daily Traffic | 1,322 (2023) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 722 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 0006585A0000000 |