Structure 16144A0000000 · Ferry County, WA
Carries SR 20 over Obrien Creek, 4.1 E Jct SR 21.
21 ft end to end. 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 | Ferry |
| Location | 4.1 E Jct SR 21 |
| Carries | SR 20 |
| Crosses | Obrien Creek |
| Coordinates | 48.59839, -118.64978 |
| Material | Prestressed Concrete |
| Design | Slab |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 36.1 ft (11 m) |
| Deck Area | 70.4 sq m |
| Main Spans | 1 |
| Year Built | 2002 |
| Avg Daily Traffic | 774 (2023) |
| Truck Traffic | 14% |
| Lanes On Bridge | 2 |
| Last Inspection | June 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 0016144A0000000 |
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.