Swanton RD over Big Creek
PoorSanta Cruz County, California · 3 MI NW of SR 1 · Structure no. 36C0018
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 83 ft
- 4 main spans
- Daily traffic
- 500
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Swanton RD over Big Creek is a steel stringer/multi-beam or girder carrying Swanton RD over Big Creek in Santa Cruz County, California. It was built in 1950, so it is 75 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 500 vehicles a day, roughly 10% of them trucks, projected to reach 850 by 2040. The structure is 83 ft (25.3 m) long and 25 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Swanton RD over Big Creek built?
It was built in 1950, making it 75 years old in 2025.
What condition is Swanton RD over Big 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 2023.
How much traffic does Swanton RD over Big Creek carry?
About 500 vehicles per day (2015 count), of which roughly 10% are trucks.
How long is Swanton RD over Big Creek?
The structure is 83 ft (25.3 m) long with a longest span of 22 ft (6.7 m) and a deck 25 ft wide.
Who owns Swanton RD over Big Creek?
It is owned by the County Highway Agency.