US Highway 101 SB over San Marcos Creek
GoodSan Luis Obispo County, California · 05-SLO-101-63.56 · Structure no. 49 0263L
- Built
- 2020
- 5 years old
- Condition
- Good
- inspected November 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 222 ft
- 2 main spans
- Daily traffic
- 13,250
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 SB over San Marcos Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying US Highway 101 SB over San Marcos Creek in San Luis Obispo County, California. It was built in 2020, so it is 5 years old, younger 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 13,250 vehicles a day, roughly 13% of them trucks, projected to reach 17,926 by 2043. The structure is 222 ft (67.7 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 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. |
| 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 San Marcos Creek built?
It was built in 2020, making it 5 years old in 2025.
What condition is US Highway 101 SB over San Marcos Creek 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 SB over San Marcos Creek carry?
About 13,250 vehicles per day (2019 count), of which roughly 13% are trucks.
How long is US Highway 101 SB over San Marcos Creek?
The structure is 222 ft (67.7 m) long with a longest span of 108 ft (33 m) and a deck 42 ft wide.
Who owns US Highway 101 SB over San Marcos Creek?
It is owned by the State Highway Agency.