US Highway 101 NB over Mission ST-S101 on Ramp
GoodSan Luis Obispo County, California · 05-SLO-101-65.08 · Structure no. 49 0162R
- Built
- 1957
- 68 years old, rebuilt 2020
- Condition
- Good
- inspected November 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 153 ft
- 3 main spans
- Daily traffic
- 10,300
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Mission ST-S101 on Ramp is a concrete continuous tee beam carrying US Highway 101 NB over Mission ST-S101 on Ramp in San Luis Obispo County, California. It was built in 1957 and reconstructed in 2020, so it is 68 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 10,300 vehicles a day, roughly 17% of them trucks, projected to reach 13,620 by 2043. The structure is 153 ft (46.6 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 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 Mission ST-S101 on Ramp built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2020.
What condition is US Highway 101 NB over Mission 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 November 2023.
How much traffic does US Highway 101 NB over Mission ST-S101 on Ramp carry?
About 10,300 vehicles per day (2019 count), of which roughly 17% are trucks.
How long is US Highway 101 NB over Mission ST-S101 on Ramp?
The structure is 153 ft (46.6 m) long with a longest span of 62 ft (18.9 m) and a deck 42 ft wide.
Who owns US Highway 101 NB over Mission ST-S101 on Ramp?
It is owned by the State Highway Agency.