FM J-20 over I 35
FairDecatur County, Iowa · At Jct. SR J20 · Structure no. 000000000022990
- Built
- 1969
- 56 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 331 ft
- 4 main spans
- Daily traffic
- 588
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
FM J-20 over I 35 is a steel continuous stringer/multi-beam or girder carrying FM J-20 over I 35 in Decatur County, Iowa. It was built in 1969, so it is 56 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 588 vehicles a day, roughly 10% of them trucks, projected to reach 588 by 2044. The structure is 331 ft (100.9 m) long and 35 ft wide.
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM J-20 over I 35 built?
It was built in 1969, making it 56 years old in 2025.
What condition is FM J-20 over I 35 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.
How much traffic does FM J-20 over I 35 carry?
About 588 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is FM J-20 over I 35?
The structure is 331 ft (100.9 m) long with a longest span of 100 ft (30.5 m) and a deck 35 ft wide.
Who owns FM J-20 over I 35?
It is owned by the State Highway Agency.