Waimea 60 Mg Reservoir Reservoir Report
Last Updated: December 24, 2025
Located in Waimea, Hawaii, the Waimea 60 Mg Reservoir, also known as the Puukapu Reservoir, is a state-owned structure primarily utilized for irrigation purposes.
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Summary
Constructed in 1957, this earth dam stands at a height of 50 feet and has a storage capacity of 189 acre-feet, making it a vital resource for the agricultural community in the region. The reservoir spans an area of 5.1 acres and is situated along the Upper Hamakua Ditch, serving as a crucial component of the local water distribution system.
Despite its significance, the Waimea 60 Mg Reservoir is rated as having a high hazard potential and poor condition assessment, prompting a need for regular inspections and maintenance. The dam's spillway type is uncontrolled with a width of 6 feet, posing potential risks in case of overflow. With a moderate risk level assigned, there is a call for effective risk management measures to ensure the safety and stability of this essential water resource. As climate change continues to impact water availability and distribution patterns, the maintenance and upkeep of structures like the Waimea 60 Mg Reservoir are crucial for sustaining agricultural activities in the region.
Year Completed |
1957 |
Dam Length |
1070 |
Dam Height |
50 |
River Or Stream |
UPPER HAMAKUA DITCH |
Primary Dam Type |
Earth |
Surface Area |
5.1 |
Hydraulic Height |
49 |
Drainage Area |
0.01 |
Nid Storage |
189 |
Structural Height |
52 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
52 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Waimea 60 Mg Reservoir