US Highway 101 SB over Marsh Street
GoodSan Luis Obispo County, California · 05-SLO-101-28.07-SLO · Structure no. 49 0008L
- Built
- 1953
- 72 years old, rebuilt 1987
- Condition
- Good
- inspected July 2024
- Type
- Slab
- Concrete Continuous
- Length
- 143 ft
- 3 main spans
- Daily traffic
- 31,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 SB over Marsh Street is a concrete continuous slab carrying US Highway 101 SB over Marsh Street in San Luis Obispo County, California. It was built in 1953 and reconstructed in 1987, so it is 72 years old, older 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 31,000 vehicles a day, roughly 9% of them trucks, projected to reach 48,301 by 2044. The structure is 143 ft (43.5 m) long and 53 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 SB over Marsh Street built?
It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1987.
What condition is US Highway 101 SB over Marsh Street 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 July 2024.
How much traffic does US Highway 101 SB over Marsh Street carry?
About 31,000 vehicles per day (2009 count), of which roughly 9% are trucks.
How long is US Highway 101 SB over Marsh Street?
The structure is 143 ft (43.5 m) long with a longest span of 54 ft (16.6 m) and a deck 53 ft wide.
Who owns US Highway 101 SB over Marsh Street?
It is owned by the State Highway Agency.