Oro Avenue over Mormon Slough
FairSan Joaquin County, California · 0.3 MI South Main ST · Structure no. 29C0338
- Built
- 1988
- 37 years old
- Condition
- Fair
- inspected January 2025
- Type
- Slab
- Concrete Continuous
- Length
- 68 ft
- 3 main spans
- Daily traffic
- 4,300
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Oro Avenue over Mormon Slough is a concrete continuous slab carrying Oro Avenue over Mormon Slough in San Joaquin County, California. It was built in 1988, so it is 37 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 4,300 vehicles a day, roughly 2% of them trucks, projected to reach 5,998 by 2045. The structure is 68 ft (20.7 m) long and 56 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Oro Avenue over Mormon Slough built?
It was built in 1988, making it 37 years old in 2025.
What condition is Oro Avenue over Mormon Slough 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 January 2025.
How much traffic does Oro Avenue over Mormon Slough carry?
About 4,300 vehicles per day (2017 count), of which roughly 2% are trucks.
How long is Oro Avenue over Mormon Slough?
The structure is 68 ft (20.7 m) long with a longest span of 26 ft (7.9 m) and a deck 56 ft wide.
Who owns Oro Avenue over Mormon Slough?
It is owned by the County Highway Agency.