Lyman Road over Mill Brook
GoodGrafton County, New Hampshire · 1.69 MI NW JCT 302 · Structure no. 015000810013600
- Built
- 1926
- 99 years old, rebuilt 1983
- Condition
- Good
- inspected April 2024
- Type
- Frame
- Concrete Continuous
- Length
- 33 ft
- 2 main spans
- Daily traffic
- 573
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Lyman Road over Mill Brook is a concrete continuous frame carrying Lyman Road over Mill Brook in Grafton County, New Hampshire. It was built in 1926 and reconstructed in 1983, so it is 99 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 573 vehicles a day, roughly 10% of them trucks, projected to reach 848 by 2043. The structure is 33 ft (10.1 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lyman Road over Mill Brook built?
It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1983.
What condition is Lyman Road over Mill 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 April 2024.
How much traffic does Lyman Road over Mill Brook carry?
About 573 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Lyman Road over Mill Brook?
The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.
Who owns Lyman Road over Mill Brook?
It is owned by the State Highway Agency.