Structure 5201800006300 · Merrimack County, NH
Carries Nh 13 over Turkey River, 2.75mi E Bow Tl.
A culvert 23 ft across. 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, so those are drawn as typical for a culvert.
| State | New Hampshire |
| County | Merrimack |
| Location | 2.75mi E Bow Tl |
| Carries | Nh 13 |
| Crosses | Turkey River |
| Coordinates | 43.18419, -71.56115 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 23.0 ft (7 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Area | 89.6 sq m |
| Main Spans | 1 |
| Year Built | 1960 |
| Avg Daily Traffic | 10,111 (2023) |
| Truck Traffic | 5% |
| Lanes On Bridge | 2 |
| Last Inspection | May 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 005201800006300 |
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.