State Route 9 over Boulder Creek
GoodSanta Cruz County, California · 05-SCR-009-13.11 · Structure no. 36 0051
- Built
- 1931
- 94 years old
- Condition
- Good
- inspected June 2024
- Type
- Arch - Deck
- Concrete
- Length
- 89 ft
- 1 main span
- Daily traffic
- 12,100
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 9 over Boulder Creek is a concrete arch - deck carrying State Route 9 over Boulder Creek in Santa Cruz County, California. It was built in 1931, so it is 94 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 12,100 vehicles a day, roughly 4% of them trucks, projected to reach 8,802 by 2042. The structure is 89 ft (27 m) long and 42 ft wide. If it were closed, the detour would be 21.7 mi (35 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. |
| 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 State Route 9 over Boulder Creek built?
It was built in 1931, making it 94 years old in 2025.
What condition is State Route 9 over Boulder Creek 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 June 2024.
How much traffic does State Route 9 over Boulder Creek carry?
About 12,100 vehicles per day (2009 count), of which roughly 4% are trucks.
How long is State Route 9 over Boulder Creek?
The structure is 89 ft (27 m) long with a longest span of 61 ft (18.6 m) and a deck 42 ft wide.
Who owns State Route 9 over Boulder Creek?
It is owned by the State Highway Agency.