US Highway 101 NB over Healdsburg AV-S101 On-Rp
FairSonoma County, California · 04-SON-101-34.55-HLBG · Structure no. 20 0085R
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected April 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 124 ft
- 3 main spans
- Daily traffic
- 22,750
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over Healdsburg AV-S101 On-Rp is a concrete continuous tee beam carrying US Highway 101 NB over Healdsburg AV-S101 On-Rp in Sonoma County, California. It was built in 1960, so it is 65 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 22,750 vehicles a day, roughly 13% of them trucks, projected to reach 44,023 by 2045. The structure is 124 ft (37.8 m) long and 42 ft wide. If it were closed, the detour would be 19.9 mi (32 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 NB over Healdsburg AV-S101 On-Rp built?
It was built in 1960, making it 65 years old in 2025.
What condition is US Highway 101 NB over Healdsburg AV-S101 On-Rp 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 April 2023.
How much traffic does US Highway 101 NB over Healdsburg AV-S101 On-Rp carry?
About 22,750 vehicles per day (2015 count), of which roughly 13% are trucks.
How long is US Highway 101 NB over Healdsburg AV-S101 On-Rp?
The structure is 124 ft (37.8 m) long with a longest span of 54 ft (16.5 m) and a deck 42 ft wide.
Who owns US Highway 101 NB over Healdsburg AV-S101 On-Rp?
It is owned by the State Highway Agency.