River Road over Clay Brook
PoorGrafton County, New Hampshire · .23 MI S. Plymouth T.L. · Structure no. 003001560017200
- Built
- 1900
- 125 years old, rebuilt 1960
- Condition
- Poor
- inspected November 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 96
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
River Road over Clay Brook is a concrete continuous culvert carrying River Road over Clay Brook in Grafton County, New Hampshire. It was built in 1900 and reconstructed in 1960, so it is 125 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 4 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.
It carries about 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.9 mi (3 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was River Road over Clay Brook built?
It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1960.
What condition is River Road over Clay 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 November 2024.
How much traffic does River Road over Clay Brook carry?
About 96 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is River Road over Clay Brook?
The structure is 21 ft (6.4 m) long with a longest span of 8 ft (2.4 m).
Who owns River Road over Clay Brook?
It is owned by the City or Municipal Highway Agency.