Lone Tree Road over Mariposa Creek
FairMerced County, California · 1.5 MI N Sandymush Road · Structure no. 39C0360
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected November 2024
- Type
- Slab
- Concrete Continuous
- Length
- 67 ft
- 2 main spans
- Daily traffic
- 75
- 1998 count
- Owner
- County
- County Highway Agency
About this bridge
Lone Tree Road over Mariposa Creek is a concrete continuous slab carrying Lone Tree Road over Mariposa Creek in Merced County, California. It was built in 1993, so it is 32 years old, younger 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 5 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 75 vehicles a day, roughly 10% of them trucks, projected to reach 86 by 2042. The structure is 67 ft (20.4 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lone Tree Road over Mariposa Creek built?
It was built in 1993, making it 32 years old in 2025.
What condition is Lone Tree Road over Mariposa 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 November 2024.
How much traffic does Lone Tree Road over Mariposa Creek carry?
About 75 vehicles per day (1998 count), of which roughly 10% are trucks.
How long is Lone Tree Road over Mariposa Creek?
The structure is 67 ft (20.4 m) long with a longest span of 32 ft (9.8 m) and a deck 25 ft wide.
Who owns Lone Tree Road over Mariposa Creek?
It is owned by the County Highway Agency.