Mill Street over UP RR & AMTRAK
GoodSan Luis Obispo County, California · NE Pepper ST · Structure no. 49C0393
- Built
- 1978
- 47 years old
- Condition
- Good
- inspected September 2022
- Type
- Slab
- Prestressed Concrete
- Length
- 83 ft
- 3 main spans
- Daily traffic
- 3,276
- 2005 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Mill Street over UP RR & AMTRAK is a prestressed concrete slab carrying Mill Street over UP RR & AMTRAK in San Luis Obispo County, California. It was built in 1978, so it is 47 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 3,276 vehicles a day, roughly 2% of them trucks, projected to reach 3,582 by 2040. The structure is 83 ft (25.3 m) long and 57 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mill Street over UP RR & AMTRAK built?
It was built in 1978, making it 47 years old in 2025.
What condition is Mill Street over UP RR & AMTRAK 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 2022.
How much traffic does Mill Street over UP RR & AMTRAK carry?
About 3,276 vehicles per day (2005 count), of which roughly 2% are trucks.
How long is Mill Street over UP RR & AMTRAK?
The structure is 83 ft (25.3 m) long with a longest span of 30 ft (9 m) and a deck 57 ft wide.
Who owns Mill Street over UP RR & AMTRAK?
It is owned by the City or Municipal Highway Agency.