State Route 46 over Mcmillan Canyon Creek
GoodSan Luis Obispo County, California · 05-SLO-046-45.50 · Structure no. 49 0253
- Built
- 2016
- 9 years old
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Prestressed Concrete
- Length
- 63 ft
- 1 main span
- Daily traffic
- 15,100
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 46 over Mcmillan Canyon Creek is a prestressed concrete slab carrying State Route 46 over Mcmillan Canyon Creek in San Luis Obispo County, California. It was built in 2016, so it is 9 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 15,100 vehicles a day, roughly 17% of them trucks, projected to reach 22,848 by 2042. The structure is 63 ft (19.2 m) long and 182 ft wide. If it were closed, the detour would be 3.1 mi (5 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 State Route 46 over Mcmillan Canyon Creek built?
It was built in 2016, making it 9 years old in 2025.
What condition is State Route 46 over Mcmillan Canyon 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 September 2024.
How much traffic does State Route 46 over Mcmillan Canyon Creek carry?
About 15,100 vehicles per day (2019 count), of which roughly 17% are trucks.
How long is State Route 46 over Mcmillan Canyon Creek?
The structure is 63 ft (19.2 m) long with a longest span of 58 ft (17.7 m) and a deck 182 ft wide.
Who owns State Route 46 over Mcmillan Canyon Creek?
It is owned by the State Highway Agency.