State Route 4 over East Fork Carson River
FairAlpine County, California · 10-ALP-004-29.78 · Structure no. 31 0013
- Built
- 1940
- 85 years old, rebuilt 1992
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 144 ft
- 3 main spans
- Daily traffic
- 490
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 over East Fork Carson River is a steel stringer/multi-beam or girder carrying State Route 4 over East Fork Carson River in Alpine County, California. It was built in 1940 and reconstructed in 1992, so it is 85 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 490 vehicles a day, roughly 4% of them trucks, projected to reach 626 by 2045. The structure is 144 ft (44 m) long and 35 ft wide. If it were closed, the detour would be 123.7 mi (199 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 4 over East Fork Carson River built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1992.
What condition is State Route 4 over East Fork Carson River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.
How much traffic does State Route 4 over East Fork Carson River carry?
About 490 vehicles per day (2019 count), of which roughly 4% are trucks.
How long is State Route 4 over East Fork Carson River?
The structure is 144 ft (44 m) long with a longest span of 56 ft (17 m) and a deck 35 ft wide.
Who owns State Route 4 over East Fork Carson River?
It is owned by the State Highway Agency.