State Route 1 over Arroyo Del Oso
GoodSan Luis Obispo County, California · 05-SLO-001-65.65 · Structure no. 49 0260
- Built
- 2017
- 8 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 216 ft
- 2 main spans
- Daily traffic
- 3,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Arroyo Del Oso is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 1 over Arroyo Del Oso in San Luis Obispo County, California. It was built in 2017, so it is 8 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 3,000 vehicles a day, roughly 2% of them trucks, projected to reach 3,350 by 2041. The structure is 216 ft (65.8 m) long and 43 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 1 over Arroyo Del Oso built?
It was built in 2017, making it 8 years old in 2025.
What condition is State Route 1 over Arroyo Del Oso 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 September 2023.
How much traffic does State Route 1 over Arroyo Del Oso carry?
About 3,000 vehicles per day (2009 count), of which roughly 2% are trucks.
How long is State Route 1 over Arroyo Del Oso?
The structure is 216 ft (65.8 m) long with a longest span of 108 ft (32.9 m) and a deck 43 ft wide.
Who owns State Route 1 over Arroyo Del Oso?
It is owned by the State Highway Agency.