US Highway 101 NB over Santa Maria River
FairSan Luis Obispo County, California · 05-SLO-101-0.09 · Structure no. 49 0111
- Built
- 1962
- 63 years old, rebuilt 2014
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 2,091 ft
- 29 main spans
- Daily traffic
- 56,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Santa Maria River is a prestressed concrete continuous stringer/multi-beam or girder carrying US Highway 101 NB over Santa Maria River in San Luis Obispo County, California. It was built in 1962 and reconstructed in 2014, so it is 63 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 56,000 vehicles a day, roughly 7% of them trucks, projected to reach 112,090 by 2042. The structure is 2,091 ft (637.2 m) long and 130 ft wide. If it were closed, the detour would be 43.5 mi (70 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 NB over Santa Maria River built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2014.
What condition is US Highway 101 NB over Santa Maria River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.
How much traffic does US Highway 101 NB over Santa Maria River carry?
About 56,000 vehicles per day (2009 count), of which roughly 7% are trucks.
How long is US Highway 101 NB over Santa Maria River?
The structure is 2,091 ft (637.2 m) long with a longest span of 73 ft (22.4 m) and a deck 130 ft wide.
Who owns US Highway 101 NB over Santa Maria River?
It is owned by the State Highway Agency.