State Route 99 SB over Atwater Blvd & UP RR
GoodMerced County, California · 10-MER-099-23.47-ATW · Structure no. 39 0128L
- Built
- 1957
- 68 years old, rebuilt 1988
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 460 ft
- 6 main spans
- Daily traffic
- 25,000
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over Atwater Blvd & UP RR is a steel stringer/multi-beam or girder carrying State Route 99 SB over Atwater Blvd & UP RR in Merced County, California. It was built in 1957 and reconstructed in 1988, so it is 68 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 25,000 vehicles a day, roughly 25% of them trucks, projected to reach 30,413 by 2046. The structure is 460 ft (140.2 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 SB over Atwater Blvd & UP RR built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1988.
What condition is State Route 99 SB over Atwater Blvd & UP RR 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 May 2024.
How much traffic does State Route 99 SB over Atwater Blvd & UP RR carry?
About 25,000 vehicles per day (2015 count), of which roughly 25% are trucks.
How long is State Route 99 SB over Atwater Blvd & UP RR?
The structure is 460 ft (140.2 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.
Who owns State Route 99 SB over Atwater Blvd & UP RR?
It is owned by the State Highway Agency.