U.S. Highway 101 over Donahue St/N. Bridge Bld
GoodMarin County, California · 04-MRN-101-3.33-SAUS · Structure no. 27 0042
- Built
- 1943
- 82 years old, rebuilt 1996
- Condition
- Good
- inspected May 2024
- Type
- Slab
- Concrete Continuous
- Length
- 93 ft
- 5 main spans
- Daily traffic
- 106,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Donahue St/N. Bridge Bld is a concrete continuous slab carrying U.S. Highway 101 over Donahue St/N. Bridge Bld in Marin County, California. It was built in 1943 and reconstructed in 1996, so it is 82 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 106,000 vehicles a day, roughly 1% of them trucks, projected to reach 146,640 by 2042. The structure is 93 ft (28.2 m) long and 172 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Donahue St/N. Bridge Bld built?
It was built in 1943, making it 82 years old in 2025. It was reconstructed in 1996.
What condition is U.S. Highway 101 over Donahue St/N. Bridge Bld 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 Donahue St/N. Bridge Bld carry?
About 106,000 vehicles per day (2009 count), of which roughly 1% are trucks.
How long is U.S. Highway 101 over Donahue St/N. Bridge Bld?
The structure is 93 ft (28.2 m) long with a longest span of 20 ft (6.2 m) and a deck 172 ft wide.
Who owns U.S. Highway 101 over Donahue St/N. Bridge Bld?
It is owned by the State Highway Agency.