State Route 99 NB over 15th Street
FairMerced County, California · 10-MER-099-14.22-MER · Structure no. 39 0139
- Built
- 1962
- 63 years old, rebuilt 2015
- Condition
- Fair
- inspected May 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 246 ft
- 3 main spans
- Daily traffic
- 51,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 NB over 15th Street is a concrete continuous box beam or girders - multiple carrying State Route 99 NB over 15th Street in Merced County, California. It was built in 1962 and reconstructed in 2015, so it is 63 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 51,000 vehicles a day, roughly 20% of them trucks, projected to reach 76,486 by 2046. The structure is 246 ft (75 m) long and 141 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 NB over 15th Street built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2015.
What condition is State Route 99 NB over 15th Street 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 15th Street carry?
About 51,000 vehicles per day (2009 count), of which roughly 20% are trucks.
How long is State Route 99 NB over 15th Street?
The structure is 246 ft (75 m) long with a longest span of 82 ft (25 m) and a deck 141 ft wide.
Who owns State Route 99 NB over 15th Street?
It is owned by the State Highway Agency.