IRR Pioneer Parkwa over Swinomish Slough
Fair Condition69 years old3,101 vehicles/day
Location
| State | Washington |
| County | Skagit |
| Location | 0.95 Jct Morris On Maple |
| Carries | IRR Pioneer Parkwa |
| Crosses | Swinomish Slough |
| Coordinates | 48.38575, -122.50163 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 9 — Foundation above flood level |
Physical Characteristics
| Material | Steel |
| Design | Arch - Thru |
| Total Length | 796.9 ft (242.9 m) |
| Max Span | 580.1 ft (176.8 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 2210.4 sq m |
| Main Spans | 1 |
| Year Built | 1957 |
Traffic
| Avg Daily Traffic | 3,101 (2020) |
| Truck Traffic | 7% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 424 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is on the National Register of Historic Places |
| Structure Number | 084845000000000 |