I-89 SB over Truck Road Mascoma River
FairGrafton County, New Hampshire · 5.9 MI Enfield Tl · Structure no. 014400980011100
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 231 ft
- 3 main spans
- Daily traffic
- 19,997
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-89 SB over Truck Road Mascoma River is a steel continuous stringer/multi-beam or girder carrying I-89 SB over Truck Road Mascoma River in Grafton County, New Hampshire. It was built in 1966, so it is 59 years old, older than the New Hampshire average of 56.9 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 19,997 vehicles a day, roughly 6% of them trucks, projected to reach 29,595 by 2043. The structure is 231 ft (70.4 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-89 SB over Truck Road Mascoma River built?
It was built in 1966, making it 59 years old in 2025.
What condition is I-89 SB over Truck Road Mascoma River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.
How much traffic does I-89 SB over Truck Road Mascoma River carry?
About 19,997 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is I-89 SB over Truck Road Mascoma River?
The structure is 231 ft (70.4 m) long with a longest span of 87 ft (26.5 m) and a deck 42 ft wide.
Who owns I-89 SB over Truck Road Mascoma River?
It is owned by the State Highway Agency.