2nd ST over Irwin Creek
GoodMarin County, California · West Side RTE 101 · Structure no. 27C0022
- Built
- 1965
- 60 years old
- Condition
- Good
- inspected July 2023
- Type
- Slab
- Concrete Continuous
- Length
- 62 ft
- 3 main spans
- Daily traffic
- 20,000
- 1978 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
2nd ST over Irwin Creek is a concrete continuous slab carrying 2nd ST over Irwin Creek in Marin County, California. It was built in 1965, so it is 60 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 20,000 vehicles a day, roughly 10% of them trucks, projected to reach 27,260 by 2041. The structure is 62 ft (18.9 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 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 2nd ST over Irwin Creek built?
It was built in 1965, making it 60 years old in 2025.
What condition is 2nd ST over Irwin 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 July 2023.
How much traffic does 2nd ST over Irwin Creek carry?
About 20,000 vehicles per day (1978 count), of which roughly 10% are trucks.
How long is 2nd ST over Irwin Creek?
The structure is 62 ft (18.9 m) long with a longest span of 20 ft (6.1 m) and a deck 70 ft wide.
Who owns 2nd ST over Irwin Creek?
It is owned by the City or Municipal Highway Agency.