Route 311 over Unknown Stream
FairMaui County, Hawaii · 5.69 MI S Mokulele HWY · Structure no. 009003110300569
- Built
- 2005
- 20 years old
- Condition
- Fair
- inspected February 2025
- Type
- Culvert
- Concrete
- Length
- 33 ft
- 3 main spans
- Daily traffic
- 34,300
- 2017 count
- Owner
- State
- State Highway Agency
About this bridge
Route 311 over Unknown Stream is a concrete culvert carrying Route 311 over Unknown Stream in Maui County, Hawaii. It was built in 2005, so it is 20 years old, younger than the Hawaii average of 63.8 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 34,300 vehicles a day, projected to reach 40,200 by 2027. The structure is 33 ft (10.2 m) long and 108 ft wide. If it were closed, the detour would be 9.9 mi (16 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Route 311 over Unknown Stream built?
It was built in 2005, making it 20 years old in 2025.
What condition is Route 311 over Unknown Stream 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 February 2025.
How much traffic does Route 311 over Unknown Stream carry?
About 34,300 vehicles per day (2017 count).
How long is Route 311 over Unknown Stream?
The structure is 33 ft (10.2 m) long with a longest span of 12 ft (3.7 m) and a deck 108 ft wide.
Who owns Route 311 over Unknown Stream?
It is owned by the State Highway Agency.