Marlow Road over Piner Creek
FairSonoma County, California · Marlow Road · Structure no. 20C0182
- Built
- 1960
- 65 years old
- Condition
- Fair
- inspected June 2024
- Type
- Culvert
- Concrete Continuous
- Length
- 26 ft
- 2 main spans
- Daily traffic
- 2,300
- 2018 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Marlow Road over Piner Creek is a concrete continuous culvert carrying Marlow Road over Piner Creek 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 6 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 2,300 vehicles a day, roughly 2% of them trucks, projected to reach 2,761 by 2045. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 3.7 mi (6 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Marlow Road over Piner Creek built?
It was built in 1960, making it 65 years old in 2025.
What condition is Marlow Road over Piner Creek 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 Marlow Road over Piner Creek carry?
About 2,300 vehicles per day (2018 count), of which roughly 2% are trucks.
How long is Marlow Road over Piner Creek?
The structure is 26 ft (7.8 m) long with a longest span of 12 ft (3.6 m).
Who owns Marlow Road over Piner Creek?
It is owned by the City or Municipal Highway Agency.