South Flat Top Dam Reservoir Report

Last Updated: December 5, 2025

South Flat Top Dam, located in Bosque, Texas, is a private earth dam completed in 1966 for the primary purpose of water supply.


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Summary

Standing at 25 feet high with a length of 1190 feet, this dam has a storage capacity of 300 acre-feet, with a normal storage level of 137 acre-feet. Situated on the TR-North Bosque River, the dam has a hazard potential classified as "Not Available" and a risk assessment rating of "High (2)", indicating the importance of its maintenance and monitoring.

Despite being privately owned, South Flat Top Dam is regulated by the state and undergoes regular inspections. The dam does not have a spillway and features a buttress core type with one outlet gate. With a surface area of 18 acres, this dam plays a crucial role in water resource management in the region. Its location in the Fort Worth District highlights its significance in the overall water infrastructure of Texas.

For water resource and climate enthusiasts, South Flat Top Dam serves as a fascinating example of earth dam engineering for water supply. Its presence on the TR-North Bosque River adds to the hydrological landscape of the area and underscores the importance of proper maintenance and risk management for dam structures. As a key component in the water supply system of Bosque, Texas, South Flat Top Dam represents the intersection of human intervention and natural resources in the ongoing effort to secure water for communities in the region.

Year Completed

1966

Dam Length

1190

Dam Height

25

River Or Stream

TR-NORTH BOSQUE RIVER

Primary Dam Type

Earth

Surface Area

18

Hydraulic Height

25

Nid Storage

300

Structural Height

25

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

Nid Height

25
       
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.