Ill 170 over Ill Mich Canal
PoorLaSalle County, Illinois · 0.42 MI S of US 6 · Structure no. 050006900000000
- Built
- 1940
- 85 years old
- Condition
- Poor
- inspected December 2024
- Type
- Slab
- Concrete
- Length
- 24 ft
- 1 main span
- Daily traffic
- 5,550
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
Ill 170 over Ill Mich Canal is a concrete slab carrying Ill 170 over Ill Mich Canal in LaSalle County, Illinois. It was built in 1940, so it is 85 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: open, would be posted or closed except for temporary shoring.
It carries about 5,550 vehicles a day, roughly 9% of them trucks, projected to reach 5,808 by 2046. The structure is 24 ft (7.3 m) long and 59 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ill 170 over Ill Mich Canal built?
It was built in 1940, making it 85 years old in 2025.
What condition is Ill 170 over Ill Mich Canal in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.
How much traffic does Ill 170 over Ill Mich Canal carry?
About 5,550 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is Ill 170 over Ill Mich Canal?
The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.6 m) and a deck 59 ft wide.
Who owns Ill 170 over Ill Mich Canal?
It is owned by the State Highway Agency.