May Dam Reservoir Report

Last Updated: December 5, 2025

May Dam, located in Grayson, Texas, along the TR-ROCK CREEK, was completed in 1971 for irrigation purposes.


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Summary

This private Earth dam stands at a height of 24 feet and has a storage capacity of 75 acre-feet. Although the dam does not have a spillway, it is equipped with one outlet gate.

Despite being categorized as having a high risk potential, May Dam has not been rated for its condition assessment. The last inspection in 1972 revealed no significant issues, however, the dam has not undergone any recent evaluations. With no emergency action plan in place, it is crucial for stakeholders to ensure proper monitoring and maintenance to mitigate potential risks associated with the dam.

Water resource and climate enthusiasts will find May Dam's history and design intriguing, as it serves as a vital infrastructure for irrigation in the area. The lack of recent assessments and emergency preparedness highlight the need for continued attention to ensure the safety and efficiency of this essential water resource structure.

Year Completed

1971

Dam Length

300

Dam Height

24

River Or Stream

TR-ROCK CREEK

Primary Dam Type

Earth

Hydraulic Height

24

Nid Storage

75

Structural Height

24

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

24
       
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.