U.S. HWY 101 NB over Olive Avenue
FairMarin County, California · 04-MRN-101-R21.47-NVTO · Structure no. 27 0092R
- Built
- 1974
- 51 years old, rebuilt 2012
- Condition
- Fair
- inspected June 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 126 ft
- 1 main span
- Daily traffic
- 61,500
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. HWY 101 NB over Olive Avenue is a prestressed concrete box beam or girders - multiple carrying U.S. HWY 101 NB over Olive Avenue in Marin County, California. It was built in 1974 and reconstructed in 2012, so it is 51 years old, younger than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 61,500 vehicles a day, roughly 5% of them trucks, projected to reach 77,824 by 2045. The structure is 126 ft (38.4 m) long and 71 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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. HWY 101 NB over Olive Avenue built?
It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2012.
What condition is U.S. HWY 101 NB over Olive Avenue in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.
How much traffic does U.S. HWY 101 NB over Olive Avenue carry?
About 61,500 vehicles per day (2009 count), of which roughly 5% are trucks.
How long is U.S. HWY 101 NB over Olive Avenue?
The structure is 126 ft (38.4 m) long with a longest span of 124 ft (37.8 m) and a deck 71 ft wide.
Who owns U.S. HWY 101 NB over Olive Avenue?
It is owned by the State Highway Agency.