Structure 3340430 · Lewis County, NY
Carries County Road 47 over Miken Brook, 0.8 Mi N Of West Leyden.
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 slab bridge.
| State | New York |
| County | Lewis |
| Location | 0.8 Mi N Of West Leyden |
| Carries | County Road 47 |
| Crosses | Miken Brook |
| Coordinates | 43.47025, -75.46881 |
| Material | Concrete |
| Design | Slab |
| Total Length | 22.0 ft (6.7 m) |
| Max Span | 21.0 ft (6.4 m) |
| Deck Width | 30.5 ft (9.3 m) |
| Deck Area | 62.3 sq m |
| Main Spans | 1 |
| Year Built | 1939 |
| Avg Daily Traffic | 236 (2015) |
| Truck Traffic | 8% |
| Lanes On Bridge | 2 |
| Last Inspection | May 2023 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 4 — Foundations need monitoring |
| Structure Number | 000000003340430 |
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.