Structure 30307 · Boundary County, ID
Carries Stagecoach Road over Trail Creek, At Naples.
22 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 multi-beam bridge.
| State | Idaho |
| County | Boundary |
| Location | At Naples |
| Carries | Stagecoach Road |
| Crosses | Trail Creek |
| Coordinates | 48.57653, -116.39086 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 22.0 ft (6.7 m) |
| Deck Width | 14.1 ft (4.3 m) |
| Deck Area | 28.8 sq m |
| Main Spans | 1 |
| Year Built | 2007 |
| Avg Daily Traffic | 810 (2023) |
| Truck Traffic | 4% |
| Lanes On Bridge | 1 |
| Last Inspection | August 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 | 000000000030307 |
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.