US Highway 101 SB over Palmer Blvd
FairHumboldt County, California · 01-HUM-101-62.23 · Structure no. 04 0112L
- Built
- 1958
- 67 years old, rebuilt 2005
- Condition
- Fair
- inspected August 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 113 ft
- 3 main spans
- Daily traffic
- 22,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 SB over Palmer Blvd is a concrete continuous tee beam carrying US Highway 101 SB over Palmer Blvd in Humboldt County, California. It was built in 1958 and reconstructed in 2005, so it is 67 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 22,000 vehicles a day, roughly 10% of them trucks, projected to reach 27,041 by 2041. The structure is 113 ft (34.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 SB over Palmer Blvd built?
It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2005.
What condition is US Highway 101 SB over Palmer Blvd in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.
How much traffic does US Highway 101 SB over Palmer Blvd carry?
About 22,000 vehicles per day (2009 count), of which roughly 10% are trucks.
How long is US Highway 101 SB over Palmer Blvd?
The structure is 113 ft (34.4 m) long with a longest span of 47 ft (14.3 m) and a deck 43 ft wide.
Who owns US Highway 101 SB over Palmer Blvd?
It is owned by the State Highway Agency.