Lasalle Street over Trolley Car Tunnel
FairCook County, Illinois · N. of Chicago River · Structure no. 016617600000000
- Built
- 1911
- 114 years old, rebuilt 2007
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 56 ft
- 1 main span
- Daily traffic
- 18,600
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Lasalle Street over Trolley Car Tunnel is a steel stringer/multi-beam or girder carrying Lasalle Street over Trolley Car Tunnel in Cook County, Illinois. It was built in 1911 and reconstructed in 2007, so it is 114 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 18,600 vehicles a day, roughly 5% of them trucks, projected to reach 24,745 by 2046. The structure is 56 ft (17.2 m) long and 34 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lasalle Street over Trolley Car Tunnel built?
It was built in 1911, making it 114 years old in 2025. It was reconstructed in 2007.
What condition is Lasalle Street over Trolley Car Tunnel 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 May 2024.
How much traffic does Lasalle Street over Trolley Car Tunnel carry?
About 18,600 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is Lasalle Street over Trolley Car Tunnel?
The structure is 56 ft (17.2 m) long with a longest span of 54 ft (16.6 m) and a deck 34 ft wide.
Who owns Lasalle Street over Trolley Car Tunnel?
It is owned by the City or Municipal Highway Agency.