Randolph ST over S.Br.Chicago River
PoorCook County, Illinois · 375 W & 150 N · Structure no. 016610200000000
- Built
- 1903
- 122 years old, rebuilt 1984
- Condition
- Poor
- inspected October 2024
- Type
- Movable - Bascule
- Steel
- Length
- 336 ft
- 1 main span
- Daily traffic
- 6,100
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Randolph ST over S.Br.Chicago River is a steel movable - bascule carrying Randolph ST over S.Br.Chicago River in Cook County, Illinois. It was built in 1903 and reconstructed in 1984, so it is 122 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 3 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 6,100 vehicles a day, roughly 10% of them trucks, projected to reach 11,514 by 2046. The structure is 336 ft (102.5 m) long and 76 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Randolph ST over S.Br.Chicago River built?
It was built in 1903, making it 122 years old in 2025. It was reconstructed in 1984.
What condition is Randolph ST over S.Br.Chicago River 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 October 2024.
How much traffic does Randolph ST over S.Br.Chicago River carry?
About 6,100 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is Randolph ST over S.Br.Chicago River?
The structure is 336 ft (102.5 m) long with a longest span of 213 ft (64.9 m) and a deck 76 ft wide.
Who owns Randolph ST over S.Br.Chicago River?
It is owned by the City or Municipal Highway Agency.