Lake Mineral Wells Dam Reservoir Report

Last Updated: December 5, 2025

Lake Mineral Wells Dam, located in Parker County, Texas, was completed in 1920 and serves as a critical water supply resource for the local community.


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Summary

The dam, designed by William McClendon, stands at a height of 53.6 feet and has a storage capacity of 16,356 acre-feet. The dam is primarily an earth dam with buttress core types and is regulated by the Texas Commission on Environmental Quality (TCEQ).

The dam's spillway, with a width of 935 feet, is uncontrolled, and the outlet gates consist of one uncontrolled and one valve gate. The dam's condition assessment was rated as fair as of November 2017, and it undergoes inspections every 5 years. With a moderate risk level, the dam plays a crucial role in managing water resources and mitigating flood risks in the region. Water and climate enthusiasts will find Lake Mineral Wells Dam to be an intriguing structure that contributes significantly to the water supply infrastructure in Texas.

Year Completed

1920

Dam Length

1610

Dam Height

53.6

River Or Stream

ROCK CREEK

Primary Dam Type

Earth

Surface Area

668

Hydraulic Height

53.6

Drainage Area

63.3

Nid Storage

16356

Structural Height

53.6

Outlet Gates

Uncontrolled - 1, Valve - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

54
       
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.