South Main Street over Nissitissit River
GoodHillsborough County, New Hampshire · 1.45 MI N Mass Sl · Structure no. 003400950006100
- Built
- 1931
- 94 years old, rebuilt 1993
- Condition
- Good
- inspected June 2024
- Type
- Frame
- Concrete
- Length
- 28 ft
- 1 main span
- Daily traffic
- 3,553
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
South Main Street over Nissitissit River is a concrete frame carrying South Main Street over Nissitissit River in Hillsborough County, New Hampshire. It was built in 1931 and reconstructed in 1993, so it is 94 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 3,553 vehicles a day, roughly 4% of them trucks, projected to reach 5,258 by 2043. The structure is 28 ft (8.5 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 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 South Main Street over Nissitissit River built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1993.
What condition is South Main Street over Nissitissit 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 June 2024.
How much traffic does South Main Street over Nissitissit River carry?
About 3,553 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is South Main Street over Nissitissit River?
The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 28 ft wide.
Who owns South Main Street over Nissitissit River?
It is owned by the State Highway Agency.