State Route 180 over Four Mile Slough
FairFresno County, California · 06-FRE-180-31.33 · Structure no. 42 0048
- Built
- 2001
- 24 years old
- Condition
- Fair
- inspected December 2024
- Type
- Slab
- Concrete Continuous
- Length
- 120 ft
- 6 main spans
- Daily traffic
- 5,400
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 180 over Four Mile Slough is a concrete continuous slab carrying State Route 180 over Four Mile Slough in Fresno County, California. It was built in 2001, so it is 24 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 6 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 5,400 vehicles a day, roughly 15% of them trucks, projected to reach 10,811 by 2046. The structure is 120 ft (36.6 m) long and 43 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 180 over Four Mile Slough built?
It was built in 2001, making it 24 years old in 2025.
What condition is State Route 180 over Four Mile Slough 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 December 2024.
How much traffic does State Route 180 over Four Mile Slough carry?
About 5,400 vehicles per day (2009 count), of which roughly 15% are trucks.
How long is State Route 180 over Four Mile Slough?
The structure is 120 ft (36.6 m) long with a longest span of 22 ft (6.6 m) and a deck 43 ft wide.
Who owns State Route 180 over Four Mile Slough?
It is owned by the State Highway Agency.