State Route 99 SB over Merced River
GoodMerced County, California · 10-MER-099-R31.00 · Structure no. 39 0015L
- Built
- 1997
- 28 years old
- Condition
- Good
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 377 ft
- 2 main spans
- Daily traffic
- 28,000
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over Merced River is a prestressed concrete continuous box beam or girders - multiple carrying State Route 99 SB over Merced River in Merced County, California. It was built in 1997, so it is 28 years old, younger 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 28,000 vehicles a day, projected to reach 37,338 by 2046. The structure is 377 ft (115 m) long and 68 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 SB over Merced River built?
It was built in 1997, making it 28 years old in 2025.
What condition is State Route 99 SB over Merced River 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 Merced River carry?
About 28,000 vehicles per day (2015 count).
How long is State Route 99 SB over Merced River?
The structure is 377 ft (115 m) long with a longest span of 213 ft (64.8 m) and a deck 68 ft wide.
Who owns State Route 99 SB over Merced River?
It is owned by the State Highway Agency.