Fillmore Site 3 Dam Reservoir Report

Last Updated: December 23, 2025

The Fillmore Site 3 Dam, also known as Lower Fillmore Dam, is a local government-owned structure in Doña Ana, New Mexico, designed by the USDA NRCS and completed in 1962.


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Summary

The dam, situated on the Lower Fillmore Arroyo, serves the primary purpose of flood risk reduction, with a dam height of 24 feet and a structural height of 29 feet. It has a capacity of 180 acre-feet and a maximum discharge of 8100 cubic feet per second, making it crucial for protecting the surrounding community from potential flooding events.

Despite its importance in flood control, the Fillmore Site 3 Dam is currently rated as having a high hazard potential and poor condition assessment, highlighting the need for ongoing maintenance and potential upgrades. The dam features an uncontrolled spillway and outlet gates, with inspection frequency set at every 5 years. With its risk assessment categorized as moderate, stakeholders must prioritize risk management measures to ensure the safety and integrity of the dam for the community it serves. As climate change continues to impact water resources, the Fillmore Site 3 Dam represents a critical infrastructure in need of attention and investment to enhance its resilience in the face of evolving environmental challenges.

Year Completed

1962

Dam Length

1375

Dam Height

24

River Or Stream

LOWER FILLMORE ARROYO

Primary Dam Type

Earth

Drainage Area

2.5

Nid Storage

180

Structural Height

29

Outlet Gates

Uncontrolled - 0

Hazard Potential

High

Foundations

Soil

Nid Height

29
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.