US Highway 101 NB over Bridge ST-S101 on Ramp
GoodSan Luis Obispo County, California · 05-SLO-101-12.52-ARGD · Structure no. 49 0173R
- Built
- 1959
- 66 years old
- Condition
- Good
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 219 ft
- 3 main spans
- Daily traffic
- 25,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Bridge ST-S101 on Ramp is a steel stringer/multi-beam or girder carrying US Highway 101 NB over Bridge ST-S101 on Ramp in San Luis Obispo County, California. It was built in 1959, so it is 66 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 25,500 vehicles a day, roughly 8% of them trucks, projected to reach 51,674 by 2044. The structure is 219 ft (66.7 m) long and 32 ft wide. If it were closed, the detour would be 5.6 mi (9 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 NB over Bridge ST-S101 on Ramp built?
It was built in 1959, making it 66 years old in 2025.
What condition is US Highway 101 NB over Bridge ST-S101 on Ramp in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.
How much traffic does US Highway 101 NB over Bridge ST-S101 on Ramp carry?
About 25,500 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is US Highway 101 NB over Bridge ST-S101 on Ramp?
The structure is 219 ft (66.7 m) long with a longest span of 74 ft (22.6 m) and a deck 32 ft wide.
Who owns US Highway 101 NB over Bridge ST-S101 on Ramp?
It is owned by the State Highway Agency.