Granite Street over Merrimack River
GoodHillsborough County, New Hampshire · 0.5 MI from Winter Street · Structure no. 016101330006900
- Built
- 1981
- 44 years old, rebuilt 2008
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 471 ft
- 4 main spans
- Daily traffic
- 21,111
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Granite Street over Merrimack River is a steel continuous stringer/multi-beam or girder carrying Granite Street over Merrimack River in Hillsborough County, New Hampshire. It was built in 1981 and reconstructed in 2008, so it is 44 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 21,111 vehicles a day, roughly 5% of them trucks, projected to reach 31,244 by 2043. The structure is 471 ft (143.6 m) long and 120 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Granite Street over Merrimack River built?
It was built in 1981, making it 44 years old in 2025. It was reconstructed in 2008.
What condition is Granite Street over Merrimack 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 July 2024.
How much traffic does Granite Street over Merrimack River carry?
About 21,111 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is Granite Street over Merrimack River?
The structure is 471 ft (143.6 m) long with a longest span of 127 ft (38.7 m) and a deck 120 ft wide.
Who owns Granite Street over Merrimack River?
It is owned by the City or Municipal Highway Agency.