State Route 99 NB over Route 59
FairMerced County, California · 10-MER-099-14.67-MER · Structure no. 39 0136R
- Built
- 1962
- 63 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 96 ft
- 1 main span
- Daily traffic
- 25,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 NB over Route 59 is a prestressed concrete stringer/multi-beam or girder carrying State Route 99 NB over Route 59 in Merced County, California. It was built in 1962, 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 25,500 vehicles a day, roughly 20% of them trucks, projected to reach 37,487 by 2042. The structure is 96 ft (29.3 m) long and 40 ft wide.
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 Route 59 built?
It was built in 1962, making it 63 years old in 2025.
What condition is State Route 99 NB over Route 59 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 Route 59 carry?
About 25,500 vehicles per day (2009 count), of which roughly 20% are trucks.
How long is State Route 99 NB over Route 59?
The structure is 96 ft (29.3 m) long with a longest span of 95 ft (29 m) and a deck 40 ft wide.
Who owns State Route 99 NB over Route 59?
It is owned by the State Highway Agency.