NH123 over Town Line Brook
GoodHillsborough County, New Hampshire · .05 Mi. NW Sharon Tl · Structure no. 020801000003600
- Built
- 1939
- 86 years old, rebuilt 1994
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 63 ft
- 1 main span
- Daily traffic
- 1,802
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NH123 over Town Line Brook is a steel stringer/multi-beam or girder carrying NH123 over Town Line Brook in Hillsborough County, New Hampshire. It was built in 1939 and reconstructed in 1994, so it is 86 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 1,802 vehicles a day, roughly 4% of them trucks, projected to reach 2,666 by 2043. The structure is 63 ft (19.2 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NH123 over Town Line Brook built?
It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1994.
What condition is NH123 over Town Line Brook 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 NH123 over Town Line Brook carry?
About 1,802 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is NH123 over Town Line Brook?
The structure is 63 ft (19.2 m) long with a longest span of 59 ft (18 m) and a deck 32 ft wide.
Who owns NH123 over Town Line Brook?
It is owned by the State Highway Agency.