Lyman Road over Mill Brook
GoodGrafton County, New Hampshire · 1.09 MI NW JCT 302 · Structure no. 015000830013200
- Built
- 1928
- 97 years old, rebuilt 1982
- Condition
- Good
- inspected April 2024
- Type
- Arch - Deck
- Concrete
- Length
- 20 ft
- 1 main span
- Daily traffic
- 1,167
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Lyman Road over Mill Brook is a concrete arch - deck carrying Lyman Road over Mill Brook in Grafton County, New Hampshire. It was built in 1928 and reconstructed in 1982, so it is 97 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 1,167 vehicles a day, roughly 10% of them trucks, projected to reach 1,727 by 2043. The structure is 20 ft (6.1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lyman Road over Mill Brook built?
It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1982.
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 1,167 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Lyman Road over Mill Brook?
The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 28 ft wide.
Who owns Lyman Road over Mill Brook?
It is owned by the State Highway Agency.