U.S. Highway 101 over Lucas Valley Road
GoodMarin County, California · 04-MRN-101-14.71-SRF · Structure no. 27 0059
- Built
- 1952
- 73 years old, rebuilt 1987
- Condition
- Good
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 103 ft
- 3 main spans
- Daily traffic
- 151,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Lucas Valley Road is a concrete continuous slab carrying U.S. Highway 101 over Lucas Valley Road in Marin County, California. It was built in 1952 and reconstructed in 1987, so it is 73 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 151,000 vehicles a day, projected to reach 224,237 by 2045. The structure is 103 ft (31.4 m) long and 185 ft wide. If it were closed, the detour would be 1.9 mi (3 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Lucas Valley Road built?
It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1987.
What condition is U.S. Highway 101 over Lucas Valley Road 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 April 2023.
How much traffic does U.S. Highway 101 over Lucas Valley Road carry?
About 151,000 vehicles per day (2009 count).
How long is U.S. Highway 101 over Lucas Valley Road?
The structure is 103 ft (31.4 m) long with a longest span of 40 ft (12.2 m) and a deck 185 ft wide.
Who owns U.S. Highway 101 over Lucas Valley Road?
It is owned by the State Highway Agency.