State Route 99 over Duck Creek South Branch
FairSan Joaquin County, California · 10-SJ-099-16.46-STKN · Structure no. 29 0334
- Built
- 2016
- 9 years old
- Condition
- Fair
- inspected June 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 5,000
- 2016 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 99 over Duck Creek South Branch is a prestressed concrete slab carrying State Route 99 over Duck Creek South Branch in San Joaquin County, California. It was built in 2016, so it is 9 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 5,000 vehicles a day, roughly 13% of them trucks, projected to reach 10,202 by 2042. The structure is 51 ft (15.5 m) long and 36 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 99 over Duck Creek South Branch built?
It was built in 2016, making it 9 years old in 2025.
What condition is State Route 99 over Duck Creek South Branch 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 June 2024.
How much traffic does State Route 99 over Duck Creek South Branch carry?
About 5,000 vehicles per day (2016 count), of which roughly 13% are trucks.
How long is State Route 99 over Duck Creek South Branch?
The structure is 51 ft (15.5 m) long with a longest span of 51 ft (15.5 m) and a deck 36 ft wide.
Who owns State Route 99 over Duck Creek South Branch?
It is owned by the State Highway Agency.