FAS 321 Ch 4 over Iroquois River
GoodIroquois County, Illinois · 3 MI E of Ill 45 · Structure no. 038017800000000
- Built
- 1975
- 50 years old, rebuilt 2010
- Condition
- Good
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 372 ft
- 4 main spans
- Daily traffic
- 425
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
FAS 321 Ch 4 over Iroquois River is a prestressed concrete continuous stringer/multi-beam or girder carrying FAS 321 Ch 4 over Iroquois River in Iroquois County, Illinois. It was built in 1975 and reconstructed in 2010, so it is 50 years old, older than the Illinois average of 45.3 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 425 vehicles a day, roughly 6% of them trucks, projected to reach 429 by 2046. The structure is 372 ft (113.3 m) long and 32 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. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FAS 321 Ch 4 over Iroquois River built?
It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2010.
What condition is FAS 321 Ch 4 over Iroquois River 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 April 2023.
How much traffic does FAS 321 Ch 4 over Iroquois River carry?
About 425 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is FAS 321 Ch 4 over Iroquois River?
The structure is 372 ft (113.3 m) long with a longest span of 92 ft (28 m) and a deck 32 ft wide.
Who owns FAS 321 Ch 4 over Iroquois River?
It is owned by the County Highway Agency.