St. Anne's Dam Reservoir Report
Nearby: Marie Street Dam Elephant Butte Dike
Last Updated: December 13, 2025
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Summary
Anne's Dam, located in Truth or Consequences, New Mexico, stands as a vital structure for flood risk reduction along the Rio Grande. Built in 1960, this earth-type dam is 35 feet tall and spans 334 feet in length, serving to protect the surrounding area from potential inundation. Despite its important role, recent assessments have deemed the dam to be in poor condition, with a high hazard potential, highlighting the need for maintenance and risk management measures.
Managed by the local government and regulated by the Office of the State Engineer, St. Anne's Dam plays a crucial role in safeguarding the community from potential flooding events. Its uncontrolled spillway, with a width of 12 feet, can handle a maximum discharge of 1200 cubic feet per second, aiding in flood control efforts. However, with a surface area of only 9 acres and no normal storage capacity listed, the dam's ability to mitigate flooding in the region may be limited.
As climate change continues to impact water resources and weather patterns, the importance of maintaining and assessing infrastructure like St. Anne's Dam becomes increasingly critical. With a moderate risk assessment rating and a history of poor condition, stakeholders must prioritize necessary repairs and upgrades to ensure the dam remains effective in protecting the community from potential flood events along the Rio Grande.
Year Completed |
1960 |
Dam Length |
334 |
Dam Height |
35 |
River Or Stream |
RIO GRANDE - TR |
Primary Dam Type |
Earth |
Surface Area |
9 |
Drainage Area |
0.35 |
Outlet Gates |
Needle - 0 |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
35 |
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.
St. Anne's Dam
Elephant Butte Reservoir
Dam Site Marina