US Highway 101 SB over Atascadero Creek
PoorSan Luis Obispo County, California · 05-SLO-101-45.72-ATAS · Structure no. 49 0151L
- Built
- 1956
- 69 years old
- Condition
- Poor
- inspected May 2023
- Type
- Tee Beam
- Concrete
- Length
- 46 ft
- 1 main span
- Daily traffic
- 30,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 SB over Atascadero Creek is a concrete tee beam carrying US Highway 101 SB over Atascadero Creek in San Luis Obispo 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 30,000 vehicles a day, roughly 10% of them trucks, projected to reach 36,639 by 2043. The structure is 46 ft (14 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 SB over Atascadero Creek built?
It was built in 1956, making it 69 years old in 2025.
What condition is US Highway 101 SB over Atascadero Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.
How much traffic does US Highway 101 SB over Atascadero Creek carry?
About 30,000 vehicles per day (2009 count), of which roughly 10% are trucks.
How long is US Highway 101 SB over Atascadero Creek?
The structure is 46 ft (14 m) long with a longest span of 41 ft (12.5 m) and a deck 58 ft wide.
Who owns US Highway 101 SB over Atascadero Creek?
It is owned by the State Highway Agency.