Structure 86355000000000 · Snohomish County, WA
Carries Gibson Rd. over Swamp Creek, 1.0 W Jct I-5.
A culvert 21 ft across. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights, so those are drawn as typical for a culvert.
| State | Washington |
| County | Snohomish |
| Location | 1.0 W Jct I-5 |
| Carries | Gibson Rd. |
| Crosses | Swamp Creek |
| Coordinates | 47.88111, -122.25722 |
| Material | Aluminum/Wrought Iron/Cast Iron |
| Design | Culvert |
| Total Length | 20.7 ft (6.3 m) |
| Max Span | 20.7 ft (6.3 m) |
| Deck Area | 78.8 sq m |
| Main Spans | 1 |
| Year Built | 1995 |
| Avg Daily Traffic | 9,000 (2020) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
| Last Inspection | August 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 7 — Countermeasures installed |
| Structure Number | 086355000000000 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.