Mo State Highway J over Clarence Cannon Dam
GoodRalls County, Missouri · Mark Twain Lake · Structure no. CEPLMSMO-000004
- Built
- 1983
- 42 years old
- Condition
- Good
- inspected August 2024
- Type
- Girder and Floorbeam System
- Steel
- Length
- 365 ft
- 7 main spans
- Daily traffic
- 1,573
- 2020 count
- Owner
- Federal
- Corps of Engineers (Civil)
About this bridge
Mo State Highway J over Clarence Cannon Dam is a steel girder and floorbeam system carrying Mo State Highway J over Clarence Cannon Dam in Ralls County, Missouri. It was built in 1983, so it is 42 years old, younger than the Missouri average of 45.1 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 1,573 vehicles a day, roughly 14% of them trucks, projected to reach 2,000 by 2041. The structure is 365 ft (111.2 m) long and 37 ft wide. If it were closed, the detour would be 19.3 mi (31 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo State Highway J over Clarence Cannon Dam built?
It was built in 1983, making it 42 years old in 2025.
What condition is Mo State Highway J over Clarence Cannon Dam 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 August 2024.
How much traffic does Mo State Highway J over Clarence Cannon Dam carry?
About 1,573 vehicles per day (2020 count), of which roughly 14% are trucks.
How long is Mo State Highway J over Clarence Cannon Dam?
The structure is 365 ft (111.2 m) long with a longest span of 60 ft (18.2 m) and a deck 37 ft wide.
Who owns Mo State Highway J over Clarence Cannon Dam?
It is owned by the Corps of Engineers (Civil).