Aepoekolu Reservoir Reservoir Report

Last Updated: December 19, 2025

Aepoekolu Reservoir, located in Kukuiula, Hawaii, is a private water resource managed by the DLNR.


°F

°F

mph

Wind

%

Humidity

Summary

This Earth dam, completed in 1910, stands at a height of 37 feet and has a storage capacity of 152 acre-feet. The reservoir primarily serves the purpose of irrigation, drawing water from the Aepo Gulch for agricultural use in the area.

With a surface area of 9.9 acres and a drainage area of 0.04 square miles, Aepoekolu Reservoir plays a crucial role in water management in Kauai, Hawaii. The reservoir has a maximum discharge capacity of 2475 cubic feet per second and is equipped with an uncontrolled spillway with a width of 74 feet. Despite its high hazard potential, the dam is currently assessed to be in fair condition, with an inspection frequency of every 5 years.

As a key component of the water infrastructure in the area, Aepoekolu Reservoir is essential for sustaining agricultural activities and ensuring water availability in Kukuiula. The reservoir's risk assessment indicates a moderate level of risk, prompting the need for ongoing risk management measures to ensure the safety and efficiency of this vital water resource. With its rich history dating back over a century, Aepoekolu Reservoir remains a significant feature in Hawaii's water resource landscape.

Year Completed

1910

Dam Length

420

Dam Height

37

River Or Stream

AEPO GULCH

Primary Dam Type

Earth

Surface Area

9.9

Hydraulic Height

35

Drainage Area

0.04

Nid Storage

152

Structural Height

40

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

40
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.