Koster RD over Hospital Creek Overflow
FairSan Joaquin County, California · 0.5 MI N Gaffery RD · Structure no. 29C0374
- Built
- 1947
- 78 years old, rebuilt 2016
- Condition
- Fair
- inspected June 2024
- Type
- Tee Beam
- Concrete
- Length
- 32 ft
- 1 main span
- Daily traffic
- 390
- 2013 count
- Owner
- County
- County Highway Agency
About this bridge
Koster RD over Hospital Creek Overflow is a concrete tee beam carrying Koster RD over Hospital Creek Overflow in San Joaquin County, California. It was built in 1947 and reconstructed in 2016, so it is 78 years old, older 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 6 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 390 vehicles a day, roughly 1% of them trucks, projected to reach 161 by 2046. The structure is 32 ft (9.9 m) long and 23 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Koster RD over Hospital Creek Overflow built?
It was built in 1947, making it 78 years old in 2025. It was reconstructed in 2016.
What condition is Koster RD over Hospital Creek Overflow 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 Koster RD over Hospital Creek Overflow carry?
About 390 vehicles per day (2013 count), of which roughly 1% are trucks.
How long is Koster RD over Hospital Creek Overflow?
The structure is 32 ft (9.9 m) long with a longest span of 30 ft (9.2 m) and a deck 23 ft wide.
Who owns Koster RD over Hospital Creek Overflow?
It is owned by the County Highway Agency.