Structure 87029000000000 · Snohomish County, WA
Carries 164th ST SW over Swamp Creek, 1.0 W Jct I-5.
A culvert 23 ft across with 2 openings. 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 | 164th ST SW |
| Crosses | Swamp Creek |
| Coordinates | 47.84990, -122.26623 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 22.6 ft (6.9 m) |
| Max Span | 10.2 ft (3.1 m) |
| Deck Width | 82.0 ft (25 m) |
| Deck Area | 172.5 sq m |
| Main Spans | 2 |
| Year Built | 1960 (reconstructed 2003) |
| Avg Daily Traffic | 29,286 (2019) |
| Truck Traffic | 8% |
| Lanes On Bridge | 5 |
| Last Inspection | June 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 087029000000000 |
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.