31st ST over Des Plaines River
GoodCook County, Illinois · 2.4 M E US 45 · Structure no. 016087000000000
- Built
- 1928
- 97 years old, rebuilt 1984
- Condition
- Good
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 253 ft
- 4 main spans
- Daily traffic
- 11,300
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
31st ST over Des Plaines River is a prestressed concrete continuous stringer/multi-beam or girder carrying 31st ST over Des Plaines River in Cook County, Illinois. It was built in 1928 and reconstructed in 1984, so it is 97 years old, older than the Illinois average of 45.3 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 11,300 vehicles a day, roughly 1% of them trucks, projected to reach 10,555 by 2046. The structure is 253 ft (77.2 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 31st ST over Des Plaines River built?
It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1984.
What condition is 31st ST over Des Plaines River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.
How much traffic does 31st ST over Des Plaines River carry?
About 11,300 vehicles per day (2023 count), of which roughly 1% are trucks.
How long is 31st ST over Des Plaines River?
The structure is 253 ft (77.2 m) long with a longest span of 62 ft (18.9 m) and a deck 60 ft wide.
Who owns 31st ST over Des Plaines River?
It is owned by the State Highway Agency.