State Route 99 SB over Ashe Drain
FairMerced County, California · 10-MER-099-18.59 · Structure no. 39 0116L
- Built
- 1947
- 78 years old, rebuilt 1974
- Condition
- Fair
- inspected December 2023
- Type
- Slab
- Concrete Continuous
- Length
- 93 ft
- 5 main spans
- Daily traffic
- 28,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over Ashe Drain is a concrete continuous slab carrying State Route 99 SB over Ashe Drain in Merced County, California. It was built in 1947 and reconstructed in 1974, so it is 78 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 28,000 vehicles a day, roughly 20% of them trucks, projected to reach 42,222 by 2041. The structure is 93 ft (28.4 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 SB over Ashe Drain built?
It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1974.
What condition is State Route 99 SB over Ashe Drain 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 December 2023.
How much traffic does State Route 99 SB over Ashe Drain carry?
About 28,000 vehicles per day (2009 count), of which roughly 20% are trucks.
How long is State Route 99 SB over Ashe Drain?
The structure is 93 ft (28.4 m) long with a longest span of 20 ft (6.1 m) and a deck 36 ft wide.
Who owns State Route 99 SB over Ashe Drain?
It is owned by the State Highway Agency.