Sara Mcmillan Dam Reservoir Report

Last Updated: December 19, 2025

Sara Mcmillan Dam, located in Robertson County, Texas, is a privately owned earth dam designed by the USDA NRCS and completed in 1979.


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Summary

The dam serves multiple purposes including fire protection and providing a water source for stock or small fish pond. With a height of 29 feet and a length of 674 feet, the dam has a storage capacity of 91 acre-feet, with a normal storage level of 48 acre-feet.

Although the dam does not have a spillway, it does have an outlet gate to control water release. The dam is not currently rated for condition assessment, but it has a high risk level of 2, indicating potential hazards. Despite not being state-regulated, the dam undergoes regular inspections and is permitted for operation. The dam is situated along the TR-Pen Oak Creek and is managed by the Natural Resources Conservation Service.

With its strategic location and essential functions, Sara Mcmillan Dam plays a crucial role in water resource management and climate resilience in the region. Enthusiasts interested in water infrastructure and climate adaptation will find the dam's design and operational details intriguing, highlighting the importance of private ownership in maintaining vital water resources for various purposes.

Year Completed

1979

Dam Length

674

Dam Height

29

River Or Stream

TR-PEN OAK CREEK

Primary Dam Type

Earth

Hydraulic Height

29

Nid Storage

91

Structural Height

29

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

29
       
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.