Alpine Sanitary Reservoir Report

Last Updated: December 4, 2025

Alpine Sanitary is a privately owned offstream dam located in Apache County, Arizona.


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Summary

Built in 1980, this earth dam stands at a height of 9 feet with a length of 2414 feet, providing a storage capacity of 142.4 acre-feet and covering a surface area of 17.5 acres. While primarily serving purposes like fire protection and stock maintenance, it also supports other functions such as small fish ponds.

Managed and regulated by the Arizona Department of Water Resources, Alpine Sanitary has a significant hazard potential but is currently assessed as being in satisfactory condition. Regular inspections are conducted, with the last one taking place in June 2019, and the dam has an inspection frequency of 3 years. Despite its high risk assessment level, appropriate risk management measures are in place to ensure the safety and integrity of the structure in case of emergencies. For water resource and climate enthusiasts, Alpine Sanitary is a fascinating site that showcases the intersection of human infrastructure with natural ecosystems in the arid landscapes of Arizona.

Year Completed

1980

Dam Length

2414

Dam Height

9

River Or Stream

OFFSTREAM

Primary Dam Type

Earth

Surface Area

17.5

Nid Storage

142.4

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

9
       
Seasonal Comparison

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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.