Griffin Mill Road over Maple Falls Brook
PoorClosed to trafficRockingham County, New Hampshire · 300 Yds N. of Nh 121 · Structure no. 001300950012700
- Built
- 1850
- 175 years old, rebuilt 1991
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 29 ft
- 1 main span
- Daily traffic
- 208
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Griffin Mill Road over Maple Falls Brook is a steel stringer/multi-beam or girder carrying Griffin Mill Road over Maple Falls Brook in Rockingham County, New Hampshire. It was built in 1850 and reconstructed in 1991, so it is 175 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 poor condition with a lowest component rating of 1 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.
It carries about 208 vehicles a day, projected to reach 307 by 2043. The structure is 29 ft (8.8 m) long and 14 ft wide. If it were closed, the detour would be 98.8 mi (159 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 1 Imminent Failure | Major deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service. |
| Superstructure | 1 Imminent Failure | Major deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service. |
| Substructure | 1 Imminent Failure | Major deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Griffin Mill Road over Maple Falls Brook built?
It was built in 1850, making it 175 years old in 2025. It was reconstructed in 1991.
What condition is Griffin Mill Road over Maple Falls Brook in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.
How much traffic does Griffin Mill Road over Maple Falls Brook carry?
About 208 vehicles per day (2023 count).
How long is Griffin Mill Road over Maple Falls Brook?
The structure is 29 ft (8.8 m) long with a longest span of 24 ft (7.3 m) and a deck 14 ft wide.
Who owns Griffin Mill Road over Maple Falls Brook?
It is owned by the City or Municipal Highway Agency.