I-93 SB over Bog Brook
Good Condition58 years old10,437 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 1.1 Mi From Plymouth T.l. |
| Carries | I-93 SB |
| Crosses | Bog Brook |
| Coordinates | 43.79831, -71.67759 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 151.9 ft (46.3 m) |
| Max Span | 57.1 ft (17.4 m) |
| Deck Width | 44.0 ft (13.4 m) |
| Deck Area | 620.4 sq m |
| Main Spans | 3 |
| Year Built | 1968 (reconstructed 1992) |
Traffic
| Avg Daily Traffic | 10,437 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 723 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 003501040005900 |