Brock Lake No 1 Dam Reservoir Report

Last Updated: December 5, 2025

Brock Lake No 1 Dam, located in Erath County, Texas, is a privately owned structure that was completed in 1965 for the primary purpose of water supply.


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Summary

The dam is classified as an earth dam with a buttress core type and stands at a height of 40 feet, with a length of 550 feet. It has a storage capacity of 90 acre-feet and covers a surface area of 3.7 acres.

Despite being a privately owned dam, Brock Lake No 1 Dam is not regulated by the state and does not have a spillway. The risk assessment for the dam is considered high, with a hazard potential that is not available. The condition of the dam has not been rated, and there is no emergency action plan in place. The dam does not have locks or drainage areas associated with it.

Water resource and climate enthusiasts may find Brock Lake No 1 Dam an interesting subject for further study, given its unique characteristics and the potential risks associated with its high-risk assessment. The dam's historical significance as a water supply structure in the area adds to its appeal for those interested in the intersection of water management and infrastructure development. Further research and analysis of the dam's condition, maintenance practices, and emergency preparedness could provide valuable insights into the broader issues surrounding dam safety and water resource management.

Year Completed

1965

Dam Length

550

Dam Height

40

River Or Stream

TR-PONY CREEK

Primary Dam Type

Earth

Surface Area

3.7

Hydraulic Height

40

Nid Storage

90

Structural Height

40

Outlet Gates

None - 1

Hazard Potential

Not Available

Foundations

Unlisted/Unknown

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.