Undetermined Dams for which a downstream hazard potential has not been designated or is not provided. Losses are principally limited to the owner's property. 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. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure. 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. 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.

Not Available Dams for which the condition assessment is restricted to approved government users. 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. Unsatisfactory A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.

Investigations and studies are necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. 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. Risk may be in the range to take further action. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Fair No existing dam safety deficiencies are recognized for normal operating conditions. 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. Condition Assessment Satisfactory No existing or potential dam safety deficiencies are recognized.

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