Old Mamalahoa HWY over Ahualoa Gulch
GoodHawaii County, Hawaii · Tmk: 4-6-008:020 · Structure no. 001460001100003
- Built
- 1982
- 43 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 64 ft
- 1 main span
- Daily traffic
- 200
- 1982 count
- Owner
- County
- County Highway Agency
About this bridge
Old Mamalahoa HWY over Ahualoa Gulch is a prestressed concrete stringer/multi-beam or girder carrying Old Mamalahoa HWY over Ahualoa Gulch in Hawaii County, Hawaii. It was built in 1982, so it is 43 years old, younger than the Hawaii average of 63.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 200 vehicles a day, projected to reach 250 by 2025. The structure is 64 ft (19.4 m) long and 30 ft wide. If it were closed, the detour would be 16.2 mi (26 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Mamalahoa HWY over Ahualoa Gulch built?
It was built in 1982, making it 43 years old in 2025.
What condition is Old Mamalahoa HWY over Ahualoa Gulch in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.
How much traffic does Old Mamalahoa HWY over Ahualoa Gulch carry?
About 200 vehicles per day (1982 count).
How long is Old Mamalahoa HWY over Ahualoa Gulch?
The structure is 64 ft (19.4 m) long with a longest span of 60 ft (18.3 m) and a deck 30 ft wide.
Who owns Old Mamalahoa HWY over Ahualoa Gulch?
It is owned by the County Highway Agency.