Percha Arroyo Diversion Reservoir Report
Nearby: Caballo Percha Diversion
Last Updated: December 7, 2025
The Percha Arroyo Diversion, located in Hatch, New Mexico, is a federal structure managed by the Bureau of Reclamation.
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Summary
Completed in 1938, this Earth dam serves the primary purpose of flood risk reduction along the Rio Grande River. Standing at a height of 29 feet with a hydraulic height of 19 feet, the dam spans a length of 2489 feet and has a storage capacity of 100 acre-feet.
Despite its low hazard potential, the Percha Arroyo Diversion poses a high risk due to its condition assessment being not available. With an inspection frequency of 6 years, there is a need for further evaluation and potential risk management measures to ensure the safety and functionality of this essential water resource infrastructure. As climate change impacts water resources and infrastructure, understanding and addressing the risks associated with structures like the Percha Arroyo Diversion is crucial for sustainable water management in the region.
Year Completed |
1938 |
Dam Length |
2489 |
Dam Height |
29 |
River Or Stream |
RIO GRANDE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
19 |
Nid Storage |
100 |
Structural Height |
29 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
29 |
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.
Percha Arroyo Diversion
Caballo Reservoir