State Route 3 over Mill Creek
FairSiskiyou County, California · 02-SIS-003-6.82 · Structure no. 02 0183
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected September 2023
- Type
- Tee Beam
- Concrete
- Length
- 61 ft
- 1 main span
- Daily traffic
- 190
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 3 over Mill Creek is a concrete tee beam carrying State Route 3 over Mill Creek in Siskiyou County, California. It was built in 1970, so it is 55 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 190 vehicles a day, roughly 30% of them trucks, projected to reach 236 by 2040. The structure is 61 ft (18.6 m) long and 32 ft wide. If it were closed, the detour would be 37.3 mi (60 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 | 7 Good | Some minor problems. |
| 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 3 over Mill Creek built?
It was built in 1970, making it 55 years old in 2025.
What condition is State Route 3 over Mill 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 September 2023.
How much traffic does State Route 3 over Mill Creek carry?
About 190 vehicles per day (2015 count), of which roughly 30% are trucks.
How long is State Route 3 over Mill Creek?
The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.4 m) and a deck 32 ft wide.
Who owns State Route 3 over Mill Creek?
It is owned by the State Highway Agency.