FAI 55 SB over Mazon River @ TR 125
FairGrundy County, Illinois · 4.1 MI S of Reed RD · Structure no. 032000600000000
- Built
- 1955
- 70 years old, rebuilt 1993
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 234 ft
- 3 main spans
- Daily traffic
- 12,050
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
FAI 55 SB over Mazon River @ TR 125 is a steel continuous stringer/multi-beam or girder carrying FAI 55 SB over Mazon River @ TR 125 in Grundy County, Illinois. It was built in 1955 and reconstructed in 1993, so it is 70 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 12,050 vehicles a day, roughly 30% of them trucks, projected to reach 12,840 by 2046. The structure is 234 ft (71.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 FAI 55 SB over Mazon River @ TR 125 built?
It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1993.
What condition is FAI 55 SB over Mazon River @ TR 125 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 February 2024.
How much traffic does FAI 55 SB over Mazon River @ TR 125 carry?
About 12,050 vehicles per day (2023 count), of which roughly 30% are trucks.
How long is FAI 55 SB over Mazon River @ TR 125?
The structure is 234 ft (71.3 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.
Who owns FAI 55 SB over Mazon River @ TR 125?
It is owned by the State Highway Agency.