Wailuku Water Reservoir 6
Wailuku Water Reservoir 6 is an earth dam located in Maui County, Hawaii, built in 1967. It carries a High hazard potential classification and has a fair condition assessment.
About Wailuku Water Reservoir 6
The primary purpose of Wailuku Water Reservoir 6 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Fieldstone Management Llc, Waikapu Gardens Hoa (private).
The dam stands 33 feet tall and stretches 1,150 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 56 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 04/17/2025.
At 33 feet, this dam is taller than 78% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Hawaii dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Hawaii |
| County | Maui |
| Nearest City | Waikapu |
| Coordinates | 20.85639, -156.50095 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 1,150 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 56 acre-ft |
| Max Storage | 56 acre-ft |
| Normal Storage | 35 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Fieldstone Management LLC, Waikapu Gardens HOA |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 04/17/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | HI00150 |
| Federal ID | HI00150 |
| More Info | State Dam Safety Program |