99 Frontage RD E over Mosher Slough
GoodSan Joaquin County, California · 0.8 MI S of 8 Mile RD · Structure no. 29C0067
- Built
- 1964
- 61 years old, rebuilt 1983
- Condition
- Good
- inspected December 2023
- Type
- Slab
- Concrete Continuous
- Length
- 82 ft
- 3 main spans
- Daily traffic
- 4,312
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
99 Frontage RD E over Mosher Slough is a concrete continuous slab carrying 99 Frontage RD E over Mosher Slough in San Joaquin County, California. It was built in 1964 and reconstructed in 1983, so it is 61 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 4,312 vehicles a day, roughly 20% of them trucks, projected to reach 3,829 by 2045. The structure is 82 ft (25 m) long and 50 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| 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 99 Frontage RD E over Mosher Slough built?
It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1983.
What condition is 99 Frontage RD E over Mosher Slough in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.
How much traffic does 99 Frontage RD E over Mosher Slough carry?
About 4,312 vehicles per day (2015 count), of which roughly 20% are trucks.
How long is 99 Frontage RD E over Mosher Slough?
The structure is 82 ft (25 m) long with a longest span of 27 ft (8.2 m) and a deck 50 ft wide.
Who owns 99 Frontage RD E over Mosher Slough?
It is owned by the County Highway Agency.