Structure 86312000000000 · Skagit County, WA
Carries Cascade River RD over Sibley Creek, 10 E Jct SR 20.
Set by its lowest-rated component: Superstructure and Substructure at 7 of 9.
How ratings work24 ft end to end, longest span 8 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a slab bridge.
| State | Washington |
| County | Skagit |
| Location | 10 E Jct SR 20 |
| Carries | Cascade River RD |
| Crosses | Sibley Creek |
| Coordinates | 48.51220, -121.25004 |
| Material | Concrete |
| Design | Slab |
| Total Length | 24.0 ft (7.3 m) |
| Max Span | 7.5 ft (2.3 m) |
| Deck Width | 27.9 ft (8.5 m) |
| Deck Area | 62.0 sq m |
| Main Spans | 3 |
| Year Built | 1997 |
| Avg Daily Traffic | 188 (2021) |
| Truck Traffic | 4% |
| Lanes On Bridge | 2 |
| Last Inspection | June 2024 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 086312000000000 |
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.