State Route 99 NB over Merced River
FairMerced County, California · 10-MER-099-R30.97 · Structure no. 39 0015R
- Built
- 1999
- 26 years old
- Condition
- Fair
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 373 ft
- 2 main spans
- Daily traffic
- 28,000
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 NB over Merced River is a prestressed concrete continuous box beam or girders - multiple carrying State Route 99 NB over Merced River in Merced County, California. It was built in 1999, so it is 26 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 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, projected to reach 37,338 by 2046. The structure is 373 ft (113.7 m) long and 42 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 NB over Merced River built?
It was built in 1999, making it 26 years old in 2025.
What condition is State Route 99 NB over Merced River 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 May 2024.
How much traffic does State Route 99 NB over Merced River carry?
About 28,000 vehicles per day (2015 count).
How long is State Route 99 NB over Merced River?
The structure is 373 ft (113.7 m) long with a longest span of 208 ft (63.4 m) and a deck 42 ft wide.
Who owns State Route 99 NB over Merced River?
It is owned by the State Highway Agency.