Twp RD 170 over FAI 80
FairLaSalle County, Illinois · 2.0 MI E of Ill 178 · Structure no. 050012700000000
- Built
- 1961
- 64 years old
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 206 ft
- 4 main spans
- Daily traffic
- 50
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
Twp RD 170 over FAI 80 is a steel continuous stringer/multi-beam or girder carrying Twp RD 170 over FAI 80 in LaSalle County, Illinois. It was built in 1961, so it is 64 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 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 50 vehicles a day, projected to reach 51 by 2046. The structure is 206 ft (62.7 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Twp RD 170 over FAI 80 built?
It was built in 1961, making it 64 years old in 2025.
What condition is Twp RD 170 over FAI 80 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 Twp RD 170 over FAI 80 carry?
About 50 vehicles per day (2016 count).
How long is Twp RD 170 over FAI 80?
The structure is 206 ft (62.7 m) long with a longest span of 59 ft (18.1 m) and a deck 30 ft wide.
Who owns Twp RD 170 over FAI 80?
It is owned by the State Highway Agency.