Percha Diversion Reservoir Report
Nearby: Caballo Arroyo Dam No. 1 Caballo
Last Updated: December 29, 2025
Percha Diversion is a historic water management structure located on the Rio Grande River in the state of New Mexico.
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Summary
Built in 1917, this concrete dam stands at 19 feet high and spans 2720 feet in length, serving primarily for irrigation purposes. Managed by the Bureau of Reclamation, the dam has a storage capacity of 500 acre-feet, with a maximum discharge of 27,300 cubic feet per second.
Despite its age, Percha Diversion has a low hazard potential and a moderate risk assessment rating. The dam features an uncontrolled spillway with a width of 350 feet, ensuring efficient water release during periods of high flow. While the condition assessment is currently listed as "Not Available," the Bureau of Reclamation is responsible for regular inspections and maintenance to ensure the structure's integrity and safety.
As a key component of the region's water infrastructure, Percha Diversion plays a vital role in managing water resources for agricultural purposes in the Sierra County area. With its rich history and significant impact on the local water supply, this dam represents a lasting example of sustainable water management practices in the arid southwestern United States.
Year Completed |
1917 |
Dam Length |
2720 |
Dam Height |
19 |
River Or Stream |
RIO GRANDE RIVER |
Primary Dam Type |
Concrete |
Hydraulic Height |
8 |
Nid Storage |
500 |
Structural Height |
19 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
19 |
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 Diversion
Caballo Reservoir