Mark W Spring RD over Mark West Creek
GoodSonoma County, California · 15.5 MI N/E Intx Rdwd Hy · Structure no. 20C0111
- Built
- 1976
- 49 years old
- Condition
- Good
- inspected October 2023
- Type
- Slab
- Concrete Continuous
- Length
- 158 ft
- 4 main spans
- Daily traffic
- 2,000
- 2015 count
- Owner
- County
- County Highway Agency
About this bridge
Mark W Spring RD over Mark West Creek is a concrete continuous slab carrying Mark W Spring RD over Mark West Creek in Sonoma County, California. It was built in 1976, so it is 49 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 2,000 vehicles a day, roughly 2% of them trucks, projected to reach 5,256 by 2041. The structure is 158 ft (48.2 m) long and 41 ft wide. If it were closed, the detour would be 14.9 mi (24 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 Mark W Spring RD over Mark West Creek built?
It was built in 1976, making it 49 years old in 2025.
What condition is Mark W Spring RD over Mark West Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.
How much traffic does Mark W Spring RD over Mark West Creek carry?
About 2,000 vehicles per day (2015 count), of which roughly 2% are trucks.
How long is Mark W Spring RD over Mark West Creek?
The structure is 158 ft (48.2 m) long with a longest span of 44 ft (13.4 m) and a deck 41 ft wide.
Who owns Mark W Spring RD over Mark West Creek?
It is owned by the County Highway Agency.