U.S. Highway 101 over Miller Creek
FairMarin County, California · 04-MRN-101-15.35 · Structure no. 27 0004
- Built
- 1952
- 73 years old, rebuilt 1987
- Condition
- Fair
- inspected April 2023
- Type
- Slab
- Concrete Continuous
- Length
- 88 ft
- 3 main spans
- Daily traffic
- 151,000
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
U.S. Highway 101 over Miller Creek is a concrete continuous slab carrying U.S. Highway 101 over Miller Creek 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 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 151,000 vehicles a day, projected to reach 224,237 by 2045. The structure is 88 ft (26.8 m) long and 142 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was U.S. Highway 101 over Miller Creek 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 Miller Creek 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 April 2023.
How much traffic does U.S. Highway 101 over Miller Creek carry?
About 151,000 vehicles per day (2009 count).
How long is U.S. Highway 101 over Miller Creek?
The structure is 88 ft (26.8 m) long with a longest span of 30 ft (9.1 m) and a deck 142 ft wide.
Who owns U.S. Highway 101 over Miller Creek?
It is owned by the State Highway Agency.