Cummings Skyway over State Route 4
GoodContra Costa County, California · 04-CC-004-R4.89 · Structure no. 28 0213
- Built
- 1967
- 58 years old
- Condition
- Good
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 223 ft
- 3 main spans
- Daily traffic
- 8,100
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
Cummings Skyway over State Route 4 is a concrete continuous box beam or girders - multiple carrying Cummings Skyway over State Route 4 in Contra Costa County, California. It was built in 1967, so it is 58 years old, older 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 8,100 vehicles a day, roughly 1% of them trucks, projected to reach 11,141 by 2042. The structure is 223 ft (68 m) long and 31 ft wide.
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 Cummings Skyway over State Route 4 built?
It was built in 1967, making it 58 years old in 2025.
What condition is Cummings Skyway over State Route 4 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 May 2024.
How much traffic does Cummings Skyway over State Route 4 carry?
About 8,100 vehicles per day (2018 count), of which roughly 1% are trucks.
How long is Cummings Skyway over State Route 4?
The structure is 223 ft (68 m) long with a longest span of 89 ft (27.1 m) and a deck 31 ft wide.
Who owns Cummings Skyway over State Route 4?
It is owned by the State Highway Agency.