I-89 SB over Mascoma R Riverside DR
Good Condition60 years old16,677 vehicles/day
Location
| State | New Hampshire |
| County | Grafton |
| Location | 2.0mi From Enfield T.l. |
| Carries | I-89 SB |
| Crosses | Mascoma R Riverside DR |
| Coordinates | 43.63679, -72.21283 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 307.1 ft (93.6 m) |
| Max Span | 81.0 ft (24.7 m) |
| Deck Width | 41.7 ft (12.7 m) |
| Deck Area | 1188.7 sq m |
| Main Spans | 4 |
| Year Built | 1966 (reconstructed 1987) |
Traffic
| Avg Daily Traffic | 16,677 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 2 |
Inspection & Ownership
| Last Inspection | 523 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 014401590011200 |