State ST over Main Br Chicago Riv
PoorCook County, Illinois · 309 N State · Structure no. 016604800000000
- Built
- 1949
- 76 years old, rebuilt 1994
- Condition
- Poor
- inspected September 2024
- Type
- Movable - Bascule
- Steel
- Length
- 307 ft
- 1 main span
- Daily traffic
- 6,900
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
State ST over Main Br Chicago Riv is a steel movable - bascule carrying State ST over Main Br Chicago Riv in Cook County, Illinois. It was built in 1949 and reconstructed in 1994, so it is 76 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.
It carries about 6,900 vehicles a day, roughly 10% of them trucks, projected to reach 7,474 by 2046. The structure is 307 ft (93.7 m) long and 108 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 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State ST over Main Br Chicago Riv built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1994.
What condition is State ST over Main Br Chicago Riv 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 September 2024.
How much traffic does State ST over Main Br Chicago Riv carry?
About 6,900 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is State ST over Main Br Chicago Riv?
The structure is 307 ft (93.7 m) long with a longest span of 245 ft (74.7 m) and a deck 108 ft wide.
Who owns State ST over Main Br Chicago Riv?
It is owned by the City or Municipal Highway Agency.