State Route 4 over Silver Creek
GoodAlpine County, California · 10-ALP-004-27.98 · Structure no. 31 0012
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected October 2023
- Type
- Slab
- Prestressed Concrete
- Length
- 60 ft
- 1 main span
- Daily traffic
- 580
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 over Silver Creek is a prestressed concrete slab carrying State Route 4 over Silver Creek in Alpine County, California. It was built in 1986, so it is 39 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 580 vehicles a day, roughly 4% of them trucks, projected to reach 618 by 2041. The structure is 60 ft (18.2 m) long and 32 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 4 over Silver Creek built?
It was built in 1986, making it 39 years old in 2025.
What condition is State Route 4 over Silver Creek 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 October 2023.
How much traffic does State Route 4 over Silver Creek carry?
About 580 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is State Route 4 over Silver Creek?
The structure is 60 ft (18.2 m) long with a longest span of 57 ft (17.4 m) and a deck 32 ft wide.
Who owns State Route 4 over Silver Creek?
It is owned by the State Highway Agency.