E4-PORT Chicago over W4-S242 & N242-E4 Conns
GoodContra Costa County, California · 04-CC-004-R14.61-CND · Structure no. 28 0243S
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 667 ft
- 4 main spans
- Daily traffic
- 4,800
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
E4-PORT Chicago over W4-S242 & N242-E4 Conns is a prestressed concrete continuous box beam or girders - multiple carrying E4-PORT Chicago over W4-S242 & N242-E4 Conns in Contra Costa County, California. It was built in 1978, so it is 47 years old, younger than the California average of 54.8 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 4,800 vehicles a day, roughly 8% of them trucks, projected to reach 12,735 by 2042. The structure is 667 ft (203.3 m) long and 28 ft wide. If it were closed, the detour would be 0.6 mi (1 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was E4-PORT Chicago over W4-S242 & N242-E4 Conns built?
It was built in 1978, making it 47 years old in 2025.
What condition is E4-PORT Chicago over W4-S242 & N242-E4 Conns 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 June 2024.
How much traffic does E4-PORT Chicago over W4-S242 & N242-E4 Conns carry?
About 4,800 vehicles per day (2018 count), of which roughly 8% are trucks.
How long is E4-PORT Chicago over W4-S242 & N242-E4 Conns?
The structure is 667 ft (203.3 m) long with a longest span of 183 ft (55.7 m) and a deck 28 ft wide.
Who owns E4-PORT Chicago over W4-S242 & N242-E4 Conns?
It is owned by the State Highway Agency.