Marsh Street over San Luis Obispo Creek
FairSan Luis Obispo County, California · 13.9 MI N JCT W/Rte 101 · Structure no. 49C0415
- Built
- 1948
- 77 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 136 ft
- 3 main spans
- Daily traffic
- 12,273
- 2005 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Marsh Street over San Luis Obispo Creek is a steel continuous stringer/multi-beam or girder carrying Marsh Street over San Luis Obispo Creek in San Luis Obispo County, California. It was built in 1948, so it is 77 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 12,273 vehicles a day, roughly 3% of them trucks, projected to reach 26,490 by 2045. The structure is 136 ft (41.5 m) long and 72 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Marsh Street over San Luis Obispo Creek built?
It was built in 1948, making it 77 years old in 2025.
What condition is Marsh Street over San Luis Obispo Creek 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 July 2023.
How much traffic does Marsh Street over San Luis Obispo Creek carry?
About 12,273 vehicles per day (2005 count), of which roughly 3% are trucks.
How long is Marsh Street over San Luis Obispo Creek?
The structure is 136 ft (41.5 m) long with a longest span of 52 ft (15.8 m) and a deck 72 ft wide.
Who owns Marsh Street over San Luis Obispo Creek?
It is owned by the City or Municipal Highway Agency.