Mariposa Road over North Little Johns Creek
FairSan Joaquin County, California · 0.5 MI W Austin RD · Structure no. 29C0173
- Built
- 1934
- 91 years old, rebuilt 1973
- Condition
- Fair
- inspected January 2025
- Type
- Slab
- Concrete Continuous
- Length
- 30 ft
- 2 main spans
- Daily traffic
- 3,500
- 2015 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Mariposa Road over North Little Johns Creek is a concrete continuous slab carrying Mariposa Road over North Little Johns Creek in San Joaquin County, California. It was built in 1934 and reconstructed in 1973, so it is 91 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 3,500 vehicles a day, roughly 5% of them trucks, projected to reach 5,471 by 2045. The structure is 30 ft (9.1 m) long and 40 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mariposa Road over North Little Johns Creek built?
It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1973.
What condition is Mariposa Road over North Little Johns Creek 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 January 2025.
How much traffic does Mariposa Road over North Little Johns Creek carry?
About 3,500 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is Mariposa Road over North Little Johns Creek?
The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m) and a deck 40 ft wide.
Who owns Mariposa Road over North Little Johns Creek?
It is owned by the City or Municipal Highway Agency.