FM F-12 over I-380 & US 218
GoodJohnson County, Iowa · 2.9 Mi. S of CO RD E70. · Structure no. 000000000205625
- Built
- 1972
- 53 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 263 ft
- 4 main spans
- Daily traffic
- 6,800
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
FM F-12 over I-380 & US 218 is a prestressed concrete stringer/multi-beam or girder carrying FM F-12 over I-380 & US 218 in Johnson County, Iowa. It was built in 1972, so it is 53 years old, older than the Iowa average of 45.5 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 6,800 vehicles a day, roughly 10% of them trucks, projected to reach 6,800 by 2043. The structure is 263 ft (80.2 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM F-12 over I-380 & US 218 built?
It was built in 1972, making it 53 years old in 2025.
What condition is FM F-12 over I-380 & US 218 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 2023.
How much traffic does FM F-12 over I-380 & US 218 carry?
About 6,800 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is FM F-12 over I-380 & US 218?
The structure is 263 ft (80.2 m) long with a longest span of 87 ft (26.5 m) and a deck 35 ft wide.
Who owns FM F-12 over I-380 & US 218?
It is owned by the State Highway Agency.