I-89 NB over I-89 Ramp
GoodMerrimack County, New Hampshire · 2.1 MI West of Concord Tl · Structure no. 012901420007300
- Built
- 1959
- 66 years old, rebuilt 1992
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 148 ft
- 3 main spans
- Daily traffic
- 18,311
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-89 NB over I-89 Ramp is a steel continuous stringer/multi-beam or girder carrying I-89 NB over I-89 Ramp in Merrimack County, New Hampshire. It was built in 1959 and reconstructed in 1992, so it is 66 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 18,311 vehicles a day, roughly 9% of them trucks, projected to reach 27,100 by 2043. The structure is 148 ft (45.1 m) long and 65 ft wide. If it were closed, the detour would be 11.2 mi (18 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-89 NB over I-89 Ramp built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1992.
What condition is I-89 NB over I-89 Ramp 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 I-89 Ramp carry?
About 18,311 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is I-89 NB over I-89 Ramp?
The structure is 148 ft (45.1 m) long with a longest span of 57 ft (17.4 m) and a deck 65 ft wide.
Who owns I-89 NB over I-89 Ramp?
It is owned by the State Highway Agency.