US Highway 101 NB over First ST & Cloverdale CR
PoorSonoma County, California · 04-SON-101-R52.06-CLVD · Structure no. 20 0252R
- Built
- 1994
- 31 years old
- Condition
- Poor
- inspected May 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 259 ft
- 2 main spans
- Daily traffic
- 6,800
- 2013 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 101 NB over First ST & Cloverdale CR is a prestressed concrete continuous box beam or girders - multiple carrying US Highway 101 NB over First ST & Cloverdale CR in Sonoma County, California. It was built in 1994, so it is 31 years old, younger 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 6,800 vehicles a day, projected to reach 17,041 by 2045. The structure is 259 ft (79 m) long and 46 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 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 101 NB over First ST & Cloverdale CR built?
It was built in 1994, making it 31 years old in 2025.
What condition is US Highway 101 NB over First ST & Cloverdale CR 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 May 2023.
How much traffic does US Highway 101 NB over First ST & Cloverdale CR carry?
About 6,800 vehicles per day (2013 count).
How long is US Highway 101 NB over First ST & Cloverdale CR?
The structure is 259 ft (79 m) long with a longest span of 149 ft (45.4 m) and a deck 46 ft wide.
Who owns US Highway 101 NB over First ST & Cloverdale CR?
It is owned by the State Highway Agency.