Old Mamalahoa HWY over Kawainui Stream
PoorPosted for loadHawaii County, Hawaii · Tmk 2-7-11:2 · Structure no. 001270001100007
- Built
- 1900
- 125 years old, rebuilt 2009
- Condition
- Poor
- inspected June 2023
- Type
- Girder and Floorbeam System
- Wood or Timber
- Length
- 79 ft
- 4 main spans
- Daily traffic
- 400
- 1986 count
- Owner
- County
- County Highway Agency
About this bridge
Old Mamalahoa HWY over Kawainui Stream is a wood or timber girder and floorbeam system carrying Old Mamalahoa HWY over Kawainui Stream in Hawaii County, Hawaii. It was built in 1900 and reconstructed in 2009, so it is 125 years old, older than the Hawaii average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 400 vehicles a day, projected to reach 500 by 2025. The structure is 79 ft (24.2 m) long and 16 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| 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 Old Mamalahoa HWY over Kawainui Stream built?
It was built in 1900, making it 125 years old in 2025. It was reconstructed in 2009.
What condition is Old Mamalahoa HWY over Kawainui Stream in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.
How much traffic does Old Mamalahoa HWY over Kawainui Stream carry?
About 400 vehicles per day (1986 count).
How long is Old Mamalahoa HWY over Kawainui Stream?
The structure is 79 ft (24.2 m) long with a longest span of 20 ft (6.1 m) and a deck 16 ft wide.
Who owns Old Mamalahoa HWY over Kawainui Stream?
It is owned by the County Highway Agency.