State Route 1 over Salmon Creek
PoorMendocino County, California · 01-MEN-001-43.00 · Structure no. 10 0134
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected August 2024
- Type
- Truss - Deck
- Steel
- Length
- 685 ft
- 5 main spans
- Daily traffic
- 3,100
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 1 over Salmon Creek is a steel truss - deck carrying State Route 1 over Salmon Creek in Mendocino 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 3,100 vehicles a day, roughly 7% of them trucks, projected to reach 5,550 by 2042. The structure is 685 ft (208.8 m) long and 32 ft wide. If it were closed, the detour would be 36 mi (58 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Salmon Creek built?
It was built in 1950, making it 75 years old in 2025.
What condition is State Route 1 over Salmon 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 August 2024.
How much traffic does State Route 1 over Salmon Creek carry?
About 3,100 vehicles per day (2009 count), of which roughly 7% are trucks.
How long is State Route 1 over Salmon Creek?
The structure is 685 ft (208.8 m) long with a longest span of 160 ft (48.8 m) and a deck 32 ft wide.
Who owns State Route 1 over Salmon Creek?
It is owned by the State Highway Agency.