Iris Trail over Blackbird CR
GoodPutnam County, Missouri · S 18 T 64 N R 16 W · Structure no. 31315
- Built
- 2006
- 19 years old
- Condition
- Good
- inspected March 2023
- Type
- Tee Beam
- Prestressed Concrete Continuous
- Length
- 158 ft
- 3 main spans
- Daily traffic
- 40
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Iris Trail over Blackbird CR is a prestressed concrete continuous tee beam carrying Iris Trail over Blackbird CR in Putnam County, Missouri. It was built in 2006, so it is 19 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 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2044. The structure is 158 ft (48.2 m) long and 25 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Iris Trail over Blackbird CR built?
It was built in 2006, making it 19 years old in 2025.
What condition is Iris Trail over Blackbird CR 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 March 2023.
How much traffic does Iris Trail over Blackbird CR carry?
About 40 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is Iris Trail over Blackbird CR?
The structure is 158 ft (48.2 m) long with a longest span of 54 ft (16.5 m) and a deck 25 ft wide.
Who owns Iris Trail over Blackbird CR?
It is owned by the County Highway Agency.