Mount Shasta DR over Miller Creek
FairMarin County, California · 0.08 MI N Lucas Valley RD · Structure no. 27C0132
- Built
- 1962
- 63 years old
- Condition
- Fair
- inspected August 2023
- Type
- Slab
- Concrete Continuous
- Length
- 88 ft
- 3 main spans
- Daily traffic
- 500
- 1973 count
- Owner
- County
- County Highway Agency
About this bridge
Mount Shasta DR over Miller Creek is a concrete continuous slab carrying Mount Shasta DR over Miller Creek in Marin County, California. It was built in 1962, so it is 63 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 500 vehicles a day, roughly 2% of them trucks, projected to reach 764 by 2041. The structure is 88 ft (26.9 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mount Shasta DR over Miller Creek built?
It was built in 1962, making it 63 years old in 2025.
What condition is Mount Shasta DR 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 August 2023.
How much traffic does Mount Shasta DR over Miller Creek carry?
About 500 vehicles per day (1973 count), of which roughly 2% are trucks.
How long is Mount Shasta DR over Miller Creek?
The structure is 88 ft (26.9 m) long with a longest span of 29 ft (8.8 m) and a deck 52 ft wide.
Who owns Mount Shasta DR over Miller Creek?
It is owned by the County Highway Agency.