State Route 1 over Ten Mile River
GoodMendocino County, California · 01-MEN-001-69.65 · Structure no. 10 0274
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected September 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 1,480 ft
- 8 main spans
- Daily traffic
- 1,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Ten Mile River is a prestressed concrete continuous box beam or girders - multiple carrying State Route 1 over Ten Mile River in Mendocino County, California. It was built in 2009, so it is 16 years old, younger 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 1,500 vehicles a day, roughly 3% of them trucks, projected to reach 2,142 by 2043. The structure is 1,480 ft (451 m) long and 45 ft wide. If it were closed, the detour would be 61.5 mi (99 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 1 over Ten Mile River built?
It was built in 2009, making it 16 years old in 2025.
What condition is State Route 1 over Ten Mile River 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 September 2023.
How much traffic does State Route 1 over Ten Mile River carry?
About 1,500 vehicles per day (2009 count), of which roughly 3% are trucks.
How long is State Route 1 over Ten Mile River?
The structure is 1,480 ft (451 m) long with a longest span of 197 ft (60 m) and a deck 45 ft wide.
Who owns State Route 1 over Ten Mile River?
It is owned by the State Highway Agency.