Structure S50018B0021 · Penobscot County, ME
Carries BIA Route 440 over Sam Ayers Stream, 10.41km NW Of Access Road.
23 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 | Maine |
| County | Penobscot |
| Location | 10.41km NW Of Access Road |
| Carries | BIA Route 440 |
| Crosses | Sam Ayers Stream |
| Coordinates | 45.46856, -68.62869 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 23.0 ft (7 m) |
| Max Span | 21.7 ft (6.6 m) |
| Deck Width | 18.4 ft (5.6 m) |
| Deck Area | 39.2 sq m |
| Main Spans | 1 |
| Year Built | 1998 |
| Avg Daily Traffic | 20 (2018) |
| Truck Traffic | 50% |
| Lanes On Bridge | 1 |
| Last Inspection | July 2024 |
| Inspection Frequency | Every 12 months |
| Owner | Bureau of Indian Affairs |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 0000S50018B0021 |
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.