Structure 3505A007 10423 · Harney County, OR
Carries US 20 (hwy 007) over Silver Creek, 004 Mi W HWY 49 Jct.
46 ft end to end, longest span 23 ft. Lengths and the car on the deck are drawn to the same scale. 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 channel-beam bridge.
| State | Oregon |
| County | Harney |
| Location | 004 Mi W HWY 49 Jct |
| Carries | US 20 (hwy 007) |
| Crosses | Silver Creek |
| Coordinates | 43.54197, -119.51571 |
| Material | Concrete |
| Design | Channel Beam |
| Total Length | 45.9 ft (14 m) |
| Max Span | 23.0 ft (7 m) |
| Deck Width | 33.1 ft (10.1 m) |
| Deck Area | 141.4 sq m |
| Main Spans | 2 |
| Year Built | 1956 |
| Avg Daily Traffic | 2,325 (2022) |
| Truck Traffic | 28% |
| Lanes On Bridge | 2 |
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 3 — Scour critical |
| Structure Number | 03505A007 10423 |
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.