State Route 4 over Silver Creek
PoorAlpine County, California · 10-ALP-004-26.15 · Structure no. 31 0011
- Built
- 1952
- 73 years old
- Condition
- Poor
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Concrete Continuous
- Length
- 122 ft
- 2 main spans
- Daily traffic
- 540
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 over Silver Creek is a concrete continuous stringer/multi-beam or girder carrying State Route 4 over Silver Creek in Alpine County, California. It was built in 1952, so it is 73 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 540 vehicles a day, projected to reach 608 by 2041. The structure is 122 ft (37.2 m) long and 32 ft wide. If it were closed, the detour would be 36.7 mi (59 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 1952, making it 73 years old in 2025.
What condition is State Route 4 over Silver Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.
How much traffic does State Route 4 over Silver Creek carry?
About 540 vehicles per day (2009 count).
How long is State Route 4 over Silver Creek?
The structure is 122 ft (37.2 m) long with a longest span of 59 ft (17.9 m) and a deck 32 ft wide.
Who owns State Route 4 over Silver Creek?
It is owned by the State Highway Agency.