Summary
Built in 1908 by the Bureau of Indian Affairs, this Earth-type dam stands at a structural height of 110 feet and has a storage capacity of 2300 acre-feet. Its primary purpose is flood risk reduction, with additional functions for irrigation and water supply. Despite being a key infrastructure for the region, Black Rock poses a high hazard potential due to its age and condition, as well as its location in an area prone to natural disasters.
The dam has not been inspected since 2012, with a scheduled inspection frequency of 5 years. While an Emergency Action Plan (EAP) was last revised in 2015, there are no specific risk management measures in place. The risk assessment for Black Rock indicates a very high risk level, highlighting the urgent need for updated inspections, maintenance, and potential upgrades to ensure the safety and functionality of this critical water resource infrastructure. As climate change continues to impact water resources, Black Rock serves as a reminder of the importance of proactive management and investment in resilient infrastructure for the future.
Year Completed |
1908 |
Dam Length |
780 |
River Or Stream |
ZUNI RIVER |
Primary Dam Type |
Earth |
Nid Storage |
2300 |
Structural Height |
110 |
Hazard Potential |
High |
Nid Height |
110 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Black Rock