I-89 NB over Contoocook River
GoodMerrimack County, New Hampshire · 1.2 MI N.W. JCT 127 · Structure no. 012900930013800
- Built
- 1967
- 58 years old, rebuilt 1991
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 228 ft
- 3 main spans
- Daily traffic
- 11,594
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-89 NB over Contoocook River is a steel continuous stringer/multi-beam or girder carrying I-89 NB over Contoocook River in Merrimack County, New Hampshire. It was built in 1967 and reconstructed in 1991, so it is 58 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 11,594 vehicles a day, roughly 9% of them trucks, projected to reach 17,159 by 2043. The structure is 228 ft (69.5 m) long and 42 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 NB over Contoocook River built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 1991.
What condition is I-89 NB over Contoocook River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.
How much traffic does I-89 NB over Contoocook River carry?
About 11,594 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is I-89 NB over Contoocook River?
The structure is 228 ft (69.5 m) long with a longest span of 85 ft (25.9 m) and a deck 42 ft wide.
Who owns I-89 NB over Contoocook River?
It is owned by the State Highway Agency.