School Street over Ammonoosuc River
PoorGrafton County, New Hampshire · 214 Ft from Nh RTE 112 · Structure no. 015000630007800
- Built
- 1960
- 65 years old, rebuilt 1986
- Condition
- Poor
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 222 ft
- 3 main spans
- Daily traffic
- 2,087
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
School Street over Ammonoosuc River is a steel stringer/multi-beam or girder carrying School Street over Ammonoosuc River in Grafton County, New Hampshire. It was built in 1960 and reconstructed in 1986, so it is 65 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 2,087 vehicles a day, roughly 4% of them trucks, projected to reach 3,088 by 2043. The structure is 222 ft (67.7 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 School Street over Ammonoosuc River built?
It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1986.
What condition is School Street over Ammonoosuc River 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 October 2024.
How much traffic does School Street over Ammonoosuc River carry?
About 2,087 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is School Street over Ammonoosuc River?
The structure is 222 ft (67.7 m) long with a longest span of 77 ft (23.5 m) and a deck 36 ft wide.
Who owns School Street over Ammonoosuc River?
It is owned by the City or Municipal Highway Agency.