Wailuku Water Reservoir 10
Wailuku Water Reservoir 10 is an earth dam located in Maui County, Hawaii, built in 1951. It carries a High hazard potential classification and has a unsatisfactory condition assessment.
About Wailuku Water Reservoir 10
The primary purpose of Wailuku Water Reservoir 10 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Kuikahi Properties Llc (private).
The dam stands 52 feet tall and stretches 880 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 56 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1951, 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 unsatisfactory, indicating serious safety deficiencies exist that require immediate attention or remedial action. An emergency action plan is in place for this dam. The most recent inspection on record was 04/17/2025.
At 52 feet, this dam is taller than 93% 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 | Wailuku Heights |
| Coordinates | 20.86575, -156.51279 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 52 ft |
| Dam Height | 52 ft |
| Dam Length | 880 ft |
| Year Completed | 1951 (75 years old) |
Storage & Hydraulics
| NID Storage | 56 acre-ft |
| Max Storage | 56 acre-ft |
| Normal Storage | 39 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Kuikahi Properties LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Unsatisfactory |
| Last Inspection | 04/17/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | HI00151 |
| Federal ID | HI00151 |
| More Info | State Dam Safety Program |