I-93 SB over Nhrr
GoodGrafton County, New Hampshire · 0.4 MI Thornton Tl · Structure no. 003501280014800
- Built
- 1970
- 55 years old, rebuilt 2003
- Condition
- Good
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 187 ft
- 3 main spans
- Daily traffic
- 7,613
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-93 SB over Nhrr is a steel continuous stringer/multi-beam or girder carrying I-93 SB over Nhrr in Grafton County, New Hampshire. It was built in 1970 and reconstructed in 2003, so it is 55 years old, younger 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 7,613 vehicles a day, roughly 10% of them trucks, projected to reach 11,267 by 2043. The structure is 187 ft (57 m) long and 44 ft wide. If it were closed, the detour would be 14.3 mi (23 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 | 8 Very Good | No problems noted. |
| 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-93 SB over Nhrr built?
It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2003.
What condition is I-93 SB over Nhrr 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 April 2023.
How much traffic does I-93 SB over Nhrr carry?
About 7,613 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is I-93 SB over Nhrr?
The structure is 187 ft (57 m) long with a longest span of 68 ft (20.7 m) and a deck 44 ft wide.
Who owns I-93 SB over Nhrr?
It is owned by the State Highway Agency.