U.S. Highway 101 over SR 1 Rich by Frntge RD
GoodMarin County, California · 04-MRN-101-4.03-SAUS · Structure no. 27 0010
- Built
- 1957
- 68 years old, rebuilt 1973
- Condition
- Good
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 2,864 ft
- 21 main spans
- Daily traffic
- 133,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over SR 1 Rich by Frntge RD is a prestressed concrete continuous stringer/multi-beam or girder carrying U.S. Highway 101 over SR 1 Rich by Frntge RD in Marin County, California. It was built in 1957 and reconstructed in 1973, so it is 68 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 133,000 vehicles a day, roughly 2% of them trucks, projected to reach 174,220 by 2042. The structure is 2,864 ft (872.9 m) long and 138 ft wide. If it were closed, the detour would be 16.8 mi (27 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over SR 1 Rich by Frntge RD built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1973.
What condition is U.S. Highway 101 over SR 1 Rich by Frntge RD 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 May 2024.
How much traffic does U.S. Highway 101 over SR 1 Rich by Frntge RD carry?
About 133,000 vehicles per day (2009 count), of which roughly 2% are trucks.
How long is U.S. Highway 101 over SR 1 Rich by Frntge RD?
The structure is 2,864 ft (872.9 m) long with a longest span of 80 ft (24.4 m) and a deck 138 ft wide.
Who owns U.S. Highway 101 over SR 1 Rich by Frntge RD?
It is owned by the State Highway Agency.