Zenia Bluff RD over South Dobbyn Creek
PoorHumboldt County, California · 2 MI E/O Alderpoint RD · Structure no. 04C0064
- Built
- 1949
- 76 years old
- Condition
- Poor
- inspected February 2024
- Type
- Tee Beam
- Concrete
- Length
- 90 ft
- 2 main spans
- Daily traffic
- 85
- 2011 count
- Owner
- County
- County Highway Agency
About this bridge
Zenia Bluff RD over South Dobbyn Creek is a concrete tee beam carrying Zenia Bluff RD over South Dobbyn Creek in Humboldt County, California. It was built in 1949, so it is 76 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 85 vehicles a day, roughly 5% of them trucks, projected to reach 273 by 2042. The structure is 90 ft (27.4 m) long and 21 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Zenia Bluff RD over South Dobbyn Creek built?
It was built in 1949, making it 76 years old in 2025.
What condition is Zenia Bluff RD over South Dobbyn 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 February 2024.
How much traffic does Zenia Bluff RD over South Dobbyn Creek carry?
About 85 vehicles per day (2011 count), of which roughly 5% are trucks.
How long is Zenia Bluff RD over South Dobbyn Creek?
The structure is 90 ft (27.4 m) long with a longest span of 55 ft (16.7 m) and a deck 21 ft wide.
Who owns Zenia Bluff RD over South Dobbyn Creek?
It is owned by the County Highway Agency.