Maui Reservoir 14 Reservoir Report

Last Updated: December 20, 2025

Maui Reservoir 14, also known as Hc&S Reservoir 14, is a private water storage facility located in Kuau, Maui, Hawaii.


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Summary

Completed in 1913, this earth dam stands at a height of 30 feet and has a storage capacity of 36 acre-feet, primarily used for irrigation purposes. The reservoir is situated along an unnamed gulch, with a drainage area of 0.41 square miles.

Despite its historical significance, Maui Reservoir 14 currently faces challenges in terms of safety and condition assessment. With a high hazard potential and an unsatisfactory condition rating, the dam requires attention and maintenance to ensure its continued functionality. The last inspection in May 2019 highlighted the need for improvements, indicating moderate risk and prompting a risk management assessment.

As a critical water resource in the region, Maui Reservoir 14 serves as a reminder of the importance of maintaining and monitoring infrastructure to mitigate potential risks and ensure the safety of both the reservoir and the surrounding community. With a focus on regulatory compliance and emergency preparedness, ongoing efforts are essential to safeguard this vital resource for irrigation and water supply in Maui, Hawaii.

Year Completed

1913

Dam Length

191

Dam Height

30

River Or Stream

UNNAMED GULCH

Primary Dam Type

Earth

Surface Area

1.5

Hydraulic Height

29

Drainage Area

0.41

Nid Storage

36

Structural Height

31

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

31
       
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.