Hassayampa Check Reservoir Report

Last Updated: December 5, 2025

Hassayampa Check, located in Yavapai County, Arizona, is a gravity dam built in 1936 across the Hassayampa River for recreational purposes.


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Summary

With a height of 40 feet and a length of 175 feet, the dam has a storage capacity of 43 acre-feet and covers a surface area of 3 acres. The dam's spillway, which is uncontrolled, has a width of 175 feet and can discharge up to 1190 cubic feet per second.

Managed by a private owner, the dam is regulated by the Arizona Department of Water Resources and undergoes regular inspections with a low hazard potential rating. Despite being in operation for over 80 years, the dam's condition assessment is currently listed as "Not Rated", indicating the need for further evaluation. With its location in the picturesque Glen Oaks area, Hassayampa Check serves as a popular spot for outdoor activities and provides a scenic backdrop for visitors to enjoy.

Water resource and climate enthusiasts will appreciate the historical significance and engineering feat of Hassayampa Check, as well as the vital role it plays in water management and recreational activities along the Hassayampa River. As a key structure in the region, the dam's moderate risk assessment underscores the importance of ongoing maintenance and monitoring to ensure its continued safety and functionality in the face of changing environmental conditions.

Year Completed

1936

Dam Length

175

Dam Height

40

River Or Stream

HASSAYAMPA RIVER

Primary Dam Type

Gravity

Surface Area

3

Hydraulic Height

40

Drainage Area

1.85

Nid Storage

43

Hazard Potential

Low

Foundations

Rock

Nid Height

40
       
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.