SR 178 over Kern River
GoodKern County, California · 06-KER-178-R31.72 · Structure no. 50 0278
- Built
- 1974
- 51 years old
- Condition
- Good
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 404 ft
- 3 main spans
- Daily traffic
- 3,900
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
SR 178 over Kern River is a steel continuous stringer/multi-beam or girder carrying SR 178 over Kern River in Kern County, California. It was built in 1974, so it is 51 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 3,900 vehicles a day, projected to reach 8,610 by 2044. The structure is 404 ft (123.1 m) long and 62 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 178 over Kern River built?
It was built in 1974, making it 51 years old in 2025.
What condition is SR 178 over Kern 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 December 2024.
How much traffic does SR 178 over Kern River carry?
About 3,900 vehicles per day (2009 count).
How long is SR 178 over Kern River?
The structure is 404 ft (123.1 m) long with a longest span of 200 ft (61 m) and a deck 62 ft wide.
Who owns SR 178 over Kern River?
It is owned by the State Highway Agency.