State Route 99 SB over UP RR
FairStanislaus County, California · 10-STA-099-R3.18-TUR · Structure no. 38 0128L
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected March 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 134 ft
- 3 main spans
- Daily traffic
- 41,475
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 SB over UP RR is a concrete continuous tee beam carrying State Route 99 SB over UP RR in Stanislaus County, California. It was built in 1973, so it is 52 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 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 41,475 vehicles a day, roughly 17% of them trucks, projected to reach 82,995 by 2045. The structure is 134 ft (40.8 m) long and 57 ft wide. If it were closed, the detour would be 0.6 mi (1 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 SB over UP RR built?
It was built in 1973, making it 52 years old in 2025.
What condition is State Route 99 SB over UP RR 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 March 2023.
How much traffic does State Route 99 SB over UP RR carry?
About 41,475 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is State Route 99 SB over UP RR?
The structure is 134 ft (40.8 m) long with a longest span of 54 ft (16.6 m) and a deck 57 ft wide.
Who owns State Route 99 SB over UP RR?
It is owned by the State Highway Agency.