Main ST over Morro Creek
FairSan Luis Obispo County, California · 0.15 MI S of RTE 41 · Structure no. 49C0334
- Built
- 1921
- 104 years old, rebuilt 1955
- Condition
- Fair
- inspected May 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 55 ft
- 2 main spans
- Daily traffic
- 8,500
- 2011 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Main ST over Morro Creek is a concrete continuous tee beam carrying Main ST over Morro Creek in San Luis Obispo County, California. It was built in 1921 and reconstructed in 1955, so it is 104 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 8,500 vehicles a day, roughly 4% of them trucks, projected to reach 15,354 by 2045. The structure is 55 ft (16.8 m) long and 37 ft wide. If it were closed, the detour would be 4.3 mi (7 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 | 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 Main ST over Morro Creek built?
It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1955.
What condition is Main ST over Morro 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 May 2023.
How much traffic does Main ST over Morro Creek carry?
About 8,500 vehicles per day (2011 count), of which roughly 4% are trucks.
How long is Main ST over Morro Creek?
The structure is 55 ft (16.8 m) long with a longest span of 26 ft (7.9 m) and a deck 37 ft wide.
Who owns Main ST over Morro Creek?
It is owned by the City or Municipal Highway Agency.