South Bay Blvd over Los Osos Creek
FairSan Luis Obispo County, California · 2.15 MI South of SR 1 · Structure no. 49C0351
- Built
- 1966
- 59 years old
- Condition
- Fair
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 189 ft
- 3 main spans
- Daily traffic
- 15,232
- 2014 count
- Owner
- County
- County Highway Agency
About this bridge
South Bay Blvd over Los Osos Creek is a prestressed concrete stringer/multi-beam or girder carrying South Bay Blvd over Los Osos Creek in San Luis Obispo County, California. It was built in 1966, so it is 59 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 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 15,232 vehicles a day, roughly 3% of them trucks, projected to reach 23,620 by 2044. The structure is 189 ft (57.6 m) long and 37 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was South Bay Blvd over Los Osos Creek built?
It was built in 1966, making it 59 years old in 2025.
What condition is South Bay Blvd over Los Osos Creek 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 August 2024.
How much traffic does South Bay Blvd over Los Osos Creek carry?
About 15,232 vehicles per day (2014 count), of which roughly 3% are trucks.
How long is South Bay Blvd over Los Osos Creek?
The structure is 189 ft (57.6 m) long with a longest span of 63 ft (19.3 m) and a deck 37 ft wide.
Who owns South Bay Blvd over Los Osos Creek?
It is owned by the County Highway Agency.