International Diversion Dam Reservoir Report

Last Updated: December 6, 2025

The International Diversion Dam, located on the Rio Grande in El Paso, Texas, is a concrete structure primarily used for irrigation purposes.


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Summary

Built in 1938 by the International Boundary and Water Commission, the dam stands at 18 feet tall with a hydraulic height of 16 feet, providing water storage of 70 acre-feet. The dam has a spillway width of 332 feet and a maximum discharge capacity of 11,000 cubic feet per second, making it a crucial component for managing water resources in the region.

Managed by the International Boundary and Water Commission, the dam has been assessed to have a low hazard potential and is in satisfactory condition as of the last inspection in 2016. With a moderate risk assessment rating, the dam is equipped with Tainter (radial) outlet gates and has a history of regular maintenance and inspections by the US Army Corps of Engineers. Despite being non-federally regulated, the International Diversion Dam plays a vital role in the irrigation infrastructure of the area, showcasing a collaborative effort between federal agencies to ensure efficient water resource management along the Rio Grande.

As a key feature in the water management system of El Paso, the International Diversion Dam serves as a testament to the importance of international cooperation in addressing climate-related challenges. With its strategic location and well-maintained structure, the dam not only supports agricultural activities but also contributes to the overall resilience of the region against water-related risks. The dam's history, design, and operational management by various federal agencies highlight the intricate web of stakeholders involved in sustaining vital water resources in a changing climate landscape.

Year Completed

1938

Dam Length

332

Dam Height

7

River Or Stream

Rio Grande

Primary Dam Type

Concrete

Hydraulic Height

16

Drainage Area

29271

Nid Storage

70

Structural Height

18

Outlet Gates

Tainter (radial)

Hazard Potential

Low

Foundations

Rock

Nid Height

18
       
Seasonal Comparison

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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.
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