Twin Bridge RD over Stemple Creek
GoodMarin County, California · 0.22 MI N Tmles-Petlum RD · Structure no. 27C0122
- Built
- 1958
- 67 years old
- Condition
- Good
- inspected September 2024
- Type
- Slab
- Concrete Continuous
- Length
- 91 ft
- 3 main spans
- Daily traffic
- 80
- 1973 count
- Owner
- County
- County Highway Agency
About this bridge
Twin Bridge RD over Stemple Creek is a concrete continuous slab carrying Twin Bridge RD over Stemple Creek in Marin County, California. It was built in 1958, so it is 67 years old, older 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 80 vehicles a day, roughly 2% of them trucks, projected to reach 165 by 2046. The structure is 91 ft (27.7 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Twin Bridge RD over Stemple Creek built?
It was built in 1958, making it 67 years old in 2025.
What condition is Twin Bridge RD over Stemple 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 September 2024.
How much traffic does Twin Bridge RD over Stemple Creek carry?
About 80 vehicles per day (1973 count), of which roughly 2% are trucks.
How long is Twin Bridge RD over Stemple Creek?
The structure is 91 ft (27.7 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.
Who owns Twin Bridge RD over Stemple Creek?
It is owned by the County Highway Agency.