Structure 2347 · Ketchikan Gateway County, AK
Carries Bostwick Lake Road over Bostwick No. 2, Mile Point 1.3.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 5 of 9.
How ratings work21 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 | Alaska |
| County | Ketchikan Gateway |
| Location | Mile Point 1.3 |
| Carries | Bostwick Lake Road |
| Crosses | Bostwick No. 2 |
| Coordinates | 55.33965, -131.74377 |
| Material | Wood or Timber |
| Design | Stringer/Multi-beam |
| Total Length | 21.0 ft (6.4 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 18.7 ft (5.7 m) |
| Deck Area | 36.5 sq m |
| Main Spans | 1 |
| Year Built | 2006 |
| Avg Daily Traffic | 10 (2018) |
| Truck Traffic | 70% |
| Lanes On Bridge | 1 |
| Last Inspection | June 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Park/Forest Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 3 — Scour critical |
| Structure Number | 2347 |
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.