US Highway 101 SB over ST RTE 20 (@ Pm 33.22)
FairMendocino County, California · 01-MEN-101-30.82 · Structure no. 10 0205L
- Built
- 1962
- 63 years old
- Condition
- Fair
- inspected June 2024
- Type
- Tee Beam
- Concrete Continuous
- Length
- 172 ft
- 3 main spans
- Daily traffic
- 12,300
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 SB over ST RTE 20 (@ Pm 33.22) is a concrete continuous tee beam carrying US Highway 101 SB over ST RTE 20 (@ Pm 33.22) in Mendocino County, California. It was built in 1962, so it is 63 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 12,300 vehicles a day, roughly 11% of them trucks, projected to reach 22,597 by 2042. The structure is 172 ft (52.4 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 SB over ST RTE 20 (@ Pm 33.22) built?
It was built in 1962, making it 63 years old in 2025.
What condition is US Highway 101 SB over ST RTE 20 (@ Pm 33.22) 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 June 2024.
How much traffic does US Highway 101 SB over ST RTE 20 (@ Pm 33.22) carry?
About 12,300 vehicles per day (2009 count), of which roughly 11% are trucks.
How long is US Highway 101 SB over ST RTE 20 (@ Pm 33.22)?
The structure is 172 ft (52.4 m) long with a longest span of 71 ft (21.6 m) and a deck 40 ft wide.
Who owns US Highway 101 SB over ST RTE 20 (@ Pm 33.22)?
It is owned by the State Highway Agency.