State Route 99 over Duck Creek
GoodSan Joaquin County, California · 10-SJ-099-16.47 · Structure no. 29 0012
- Built
- 1956
- 69 years old
- Condition
- Good
- inspected June 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 41 ft
- 3 main spans
- Daily traffic
- 73,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 over Duck Creek is a concrete continuous culvert carrying State Route 99 over Duck Creek in San Joaquin County, California. It was built in 1956, so it is 69 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 73,000 vehicles a day, roughly 13% of them trucks, projected to reach 101,307 by 2046. The structure is 41 ft (12.4 m) long. If it were closed, the detour would be 6.2 mi (10 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 over Duck Creek built?
It was built in 1956, making it 69 years old in 2025.
What condition is State Route 99 over Duck Creek 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 June 2024.
How much traffic does State Route 99 over Duck Creek carry?
About 73,000 vehicles per day (2009 count), of which roughly 13% are trucks.
How long is State Route 99 over Duck Creek?
The structure is 41 ft (12.4 m) long with a longest span of 12 ft (3.7 m).
Who owns State Route 99 over Duck Creek?
It is owned by the State Highway Agency.