Window Rock Reservoir Report

Last Updated: December 15, 2025

Window Rock is a federal dam located in Arizona, specifically in the city of Window Rock.


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Summary

Built in 1936 by the Bureau of Indian Affairs, this concrete dam serves primarily for flood risk reduction, with additional purposes including fire protection, stock, and small fish pond management. Standing at a structural height of 34 feet and a length of 221 feet, Window Rock has a storage capacity of 210 acre-feet and is situated along the Black Creek-TR river or stream.

Managed and funded by the Bureau of Indian Affairs, Window Rock has a high hazard potential and is rated as having a very high risk level. Despite its critical importance for flood control in the region, the dam has not been inspected since 2012 and its condition assessment is listed as not available. With emergency action plans and risk assessments lacking, there are concerns about the dam's readiness in the face of potential disasters. Water resource and climate enthusiasts should keep an eye on developments regarding this vital infrastructure to ensure the safety and security of the surrounding communities.

Year Completed

1936

Dam Length

221

River Or Stream

BLACK CREEK -TR

Primary Dam Type

Concrete

Nid Storage

210

Structural Height

34

Hazard Potential

High

Nid Height

34
       
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.