Waste Pond Reservoir Report

Last Updated: December 5, 2025

Waste Pond in Mira Mar, San Diego, California, is a private water storage facility primarily used for tailings and water supply.


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Summary

This Earth-type dam stands at 20 feet high and spans 760 feet in length, with a storage capacity of 6 acre-feet. While the dam is not state-regulated, it falls under the jurisdiction of the Mine Safety and Health Administration, which oversees inspections and enforcement.

Despite its non-state regulated status, Waste Pond is considered to have a significant hazard potential. The condition assessment of the dam is not available, and there is no emergency action plan in place. The dam has not been modified in recent years, and there are no inspection or maintenance records provided. With its proximity to the Los Angeles District of the US Army Corps of Engineers and the oversight of the Mine Safety and Health Administration, Waste Pond remains a notable structure for water resource and climate enthusiasts to monitor closely for any potential risks or developments.

Dam Length

760

Dam Height

20

Primary Dam Type

Earth

Nid Storage

6

Hazard Potential

Significant

Nid Height

20
       
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.