State Route 4 over Murphys Grade Road
GoodCalaveras County, California · 10-CAL-004-R21.89 · Structure no. 30 0054
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 366 ft
- 3 main spans
- Daily traffic
- 9,150
- 2000 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 over Murphys Grade Road is a prestressed concrete continuous box beam or girders - multiple carrying State Route 4 over Murphys Grade Road in Calaveras County, California. It was built in 2009, so it is 16 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 9,150 vehicles a day, roughly 5% of them trucks, projected to reach 15,381 by 2043. The structure is 366 ft (111.5 m) long and 42 ft wide. If it were closed, the detour would be 1.9 mi (3 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 4 over Murphys Grade Road built?
It was built in 2009, making it 16 years old in 2025.
What condition is State Route 4 over Murphys Grade Road 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 2023.
How much traffic does State Route 4 over Murphys Grade Road carry?
About 9,150 vehicles per day (2000 count), of which roughly 5% are trucks.
How long is State Route 4 over Murphys Grade Road?
The structure is 366 ft (111.5 m) long with a longest span of 146 ft (44.6 m) and a deck 42 ft wide.
Who owns State Route 4 over Murphys Grade Road?
It is owned by the State Highway Agency.