Old State Route 99 over Miles Creek
FairMerced County, California · 0.45 MI Se/O Healy RD · Structure no. 39C0389
- Built
- 1938
- 87 years old, rebuilt 2005
- Condition
- Fair
- inspected January 2024
- Type
- Slab
- Concrete Continuous
- Length
- 76 ft
- 5 main spans
- Daily traffic
- 384
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
Old State Route 99 over Miles Creek is a concrete continuous slab carrying Old State Route 99 over Miles Creek in Merced County, California. It was built in 1938 and reconstructed in 2005, so it is 87 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 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 384 vehicles a day, projected to reach 1,572 by 2046. The structure is 76 ft (23.2 m) long and 39 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old State Route 99 over Miles Creek built?
It was built in 1938, making it 87 years old in 2025. It was reconstructed in 2005.
What condition is Old State Route 99 over Miles 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 2024.
How much traffic does Old State Route 99 over Miles Creek carry?
About 384 vehicles per day (2018 count).
How long is Old State Route 99 over Miles Creek?
The structure is 76 ft (23.2 m) long with a longest span of 21 ft (6.4 m) and a deck 39 ft wide.
Who owns Old State Route 99 over Miles Creek?
It is owned by the County Highway Agency.