US Highway 101 NB over Santa Margarita Creek
GoodSan Luis Obispo County, California · 05-SLO-101-37.99 · Structure no. 49 0153R
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 145 ft
- 1 main span
- Daily traffic
- 21,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Santa Margarita Creek is a prestressed concrete box beam or girders - multiple carrying US Highway 101 NB over Santa Margarita Creek in San Luis Obispo County, California. It was built in 1996, so it is 29 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 21,000 vehicles a day, roughly 8% of them trucks, projected to reach 39,892 by 2043. The structure is 145 ft (44.2 m) long and 59 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. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 NB over Santa Margarita Creek built?
It was built in 1996, making it 29 years old in 2025.
What condition is US Highway 101 NB over Santa Margarita 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 May 2023.
How much traffic does US Highway 101 NB over Santa Margarita Creek carry?
About 21,000 vehicles per day (2009 count), of which roughly 8% are trucks.
How long is US Highway 101 NB over Santa Margarita Creek?
The structure is 145 ft (44.2 m) long with a longest span of 140 ft (42.8 m) and a deck 59 ft wide.
Who owns US Highway 101 NB over Santa Margarita Creek?
It is owned by the State Highway Agency.