Harmonica RD over Cain Br
GoodMercer County, Missouri · S 15 T 64 N R 24 W · Structure no. 31542
- Built
- 2004
- 21 years old
- Condition
- Good
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 70 ft
- 1 main span
- Daily traffic
- 25
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Harmonica RD over Cain Br is a steel stringer/multi-beam or girder carrying Harmonica RD over Cain Br in Mercer County, Missouri. It was built in 2004, so it is 21 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 28 by 2044. The structure is 70 ft (21.3 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 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 | 7 Good | Some minor problems. |
| 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 Harmonica RD over Cain Br built?
It was built in 2004, making it 21 years old in 2025.
What condition is Harmonica RD over Cain Br 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 January 2024.
How much traffic does Harmonica RD over Cain Br carry?
About 25 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is Harmonica RD over Cain Br?
The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 20 ft wide.
Who owns Harmonica RD over Cain Br?
It is owned by the County Highway Agency.