County Road 21 over Grasse River
GoodSt. Lawrence County, New York · .3 MI NW of Pyrites · Structure no. 000000003340620
- Built
- 1994
- 31 years old
- Condition
- Good
- inspected June 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 146 ft
- 1 main span
- Daily traffic
- 1,175
- 2019 count
- Owner
- County
- County Highway Agency
About this bridge
County Road 21 over Grasse River is a steel stringer/multi-beam or girder carrying County Road 21 over Grasse River in St. Lawrence County, New York. It was built in 1994, so it is 31 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,175 vehicles a day, roughly 8% of them trucks, projected to reach 1,645 by 2039. The structure is 146 ft (44.5 m) long and 32 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County Road 21 over Grasse River built?
It was built in 1994, making it 31 years old in 2025.
What condition is County Road 21 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 June 2024.
How much traffic does County Road 21 over Grasse River carry?
About 1,175 vehicles per day (2019 count), of which roughly 8% are trucks.
How long is County Road 21 over Grasse River?
The structure is 146 ft (44.5 m) long with a longest span of 142 ft (43.2 m) and a deck 32 ft wide.
Who owns County Road 21 over Grasse River?
It is owned by the County Highway Agency.