Mariposa Road over Duck Creek S Branch
GoodSan Joaquin County, California · 0.8 MI S/E of S.H. 99 · Structure no. 29C0161
- Built
- 1934
- 91 years old, rebuilt 1973
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 41 ft
- 3 main spans
- Daily traffic
- 5,449
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Mariposa Road over Duck Creek S Branch is a concrete continuous slab carrying Mariposa Road over Duck Creek S Branch 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 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 5,449 vehicles a day, roughly 5% of them trucks, projected to reach 9,979 by 2046. The structure is 41 ft (12.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 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 Mariposa Road over Duck Creek S Branch built?
It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1973.
What condition is Mariposa Road over Duck Creek S Branch 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 September 2024.
How much traffic does Mariposa Road over Duck Creek S Branch carry?
About 5,449 vehicles per day (2013 count), of which roughly 5% are trucks.
How long is Mariposa Road over Duck Creek S Branch?
The structure is 41 ft (12.5 m) long with a longest span of 13 ft (4 m) and a deck 42 ft wide.
Who owns Mariposa Road over Duck Creek S Branch?
It is owned by the County Highway Agency.