Millbrook Road over Mill Brook
GoodGrafton County, New Hampshire · 1.28 MI S JCT 302 · Structure no. 014200790015600
- Built
- 1928
- 97 years old
- Condition
- Good
- inspected April 2024
- Type
- Arch - Deck
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 1,167
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Millbrook Road over Mill Brook is a concrete arch - deck carrying Millbrook Road over Mill Brook in Grafton County, New Hampshire. It was built in 1928, 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 30 ft (9.1 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Millbrook Road over Mill Brook built?
It was built in 1928, making it 97 years old in 2025.
What condition is Millbrook 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 Millbrook Road over Mill Brook carry?
About 1,167 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is Millbrook Road over Mill Brook?
The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.
Who owns Millbrook Road over Mill Brook?
It is owned by the State Highway Agency.