Bunch Reservoir Reservoir Report

Last Updated: December 5, 2025

Bunch Reservoir, located in Apache County, Arizona, is a privately owned earth dam structure built in 1929 for irrigation purposes along the Little Colorado River.


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Summary

With a dam height of 22 feet and structural height of 28.3 feet, the reservoir has a storage capacity of 512 acre-feet and a surface area of 27 acres. Despite its low hazard potential, the reservoir is regulated and inspected by the Arizona Department of Water Resources to ensure its safety and compliance with state regulations.

The reservoir offers recreational opportunities in addition to its primary irrigation function, making it a valuable water resource for the surrounding community. With a moderate risk assessment rating and a history of regular inspections every 5 years, Bunch Reservoir serves as a crucial water storage facility in the region. The dam structure, composed of stone core and soil foundation, supports its operational efficiency and safety measures.

Situated in the picturesque city of South Fork, Bunch Reservoir plays a vital role in water management and conservation efforts in Arizona. Governed by state regulatory agencies and maintained for public safety, the reservoir stands as a testament to sustainable water resource management in the face of changing climate conditions. Its historical significance and practical utility make Bunch Reservoir a key asset for water and climate enthusiasts seeking to understand the intersection of human infrastructure and natural ecosystems.

Year Completed

1929

Dam Length

1200

Dam Height

22

River Or Stream

LITTLE COLORADO RIVER

Primary Dam Type

Earth

Surface Area

27

Drainage Area

1

Nid Storage

512

Structural Height

28.3

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
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.