RTE 970B over Grasse River
GoodSt. Lawrence County, New York · 0.8 Miles North of Jct. O · Structure no. 000000001048270
- Built
- 1917
- 108 years old, rebuilt 2004
- Condition
- Good
- inspected May 2024
- Type
- Arch - Deck
- Concrete Continuous
- Length
- 346 ft
- 4 main spans
- Daily traffic
- 7,291
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
RTE 970B over Grasse River is a concrete continuous arch - deck carrying RTE 970B over Grasse River in St. Lawrence County, New York. It was built in 1917 and reconstructed in 2004, so it is 108 years old, older than the New York average of 53 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 7,291 vehicles a day, roughly 4% of them trucks, projected to reach 7,325 by 2041. The structure is 346 ft (105.5 m) long and 46 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was RTE 970B over Grasse River built?
It was built in 1917, making it 108 years old in 2025. It was reconstructed in 2004.
What condition is RTE 970B over Grasse River 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 May 2024.
How much traffic does RTE 970B over Grasse River carry?
About 7,291 vehicles per day (2021 count), of which roughly 4% are trucks.
How long is RTE 970B over Grasse River?
The structure is 346 ft (105.5 m) long with a longest span of 86 ft (26.2 m) and a deck 46 ft wide.
Who owns RTE 970B over Grasse River?
It is owned by the State Highway Agency.