Walnut Ave over Santa Margarita Creek
PoorSan Luis Obispo County, California · Btwn Pine Av & Chstnut Av · Structure no. 49C0170
- Built
- 1940
- 85 years old, rebuilt 1996
- Condition
- Poor
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 96 ft
- 5 main spans
- Daily traffic
- 271
- 2017 count
- Owner
- County
- County Highway Agency
About this bridge
Walnut Ave over Santa Margarita Creek is a wood or timber stringer/multi-beam or girder carrying Walnut Ave over Santa Margarita Creek in San Luis Obispo County, California. It was built in 1940 and reconstructed in 1996, so it is 85 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 271 vehicles a day, roughly 2% of them trucks, projected to reach 418 by 2044. The structure is 96 ft (29.3 m) long and 20 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Walnut Ave over Santa Margarita Creek built?
It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1996.
What condition is Walnut Ave over Santa Margarita Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.
How much traffic does Walnut Ave over Santa Margarita Creek carry?
About 271 vehicles per day (2017 count), of which roughly 2% are trucks.
How long is Walnut Ave over Santa Margarita Creek?
The structure is 96 ft (29.3 m) long with a longest span of 19 ft (5.8 m) and a deck 20 ft wide.
Who owns Walnut Ave over Santa Margarita Creek?
It is owned by the County Highway Agency.