Collier Lake Dam Reservoir Report
Last Updated: December 5, 2025
Collier Lake Dam in Erath, Texas, stands as a vital structure for water supply in the region, completed in 1960 with a height of 47 feet and a storage capacity of 320 acre-feet.
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Summary
Situated on Henshaw Creek, this earth dam with a buttress core serves a primary purpose of water supply, supporting the local community with a normal storage capacity of 237 acre-feet. Despite its critical role in water management, the dam lacks a spillway and is designated as having a high risk potential, underscoring the importance of regular inspections and risk management measures.
Owned privately, Collier Lake Dam falls under state jurisdiction with permitting and inspection responsibilities delegated to the state regulatory agency in Texas. The dam's condition is currently not rated, highlighting the need for ongoing maintenance and assessment to ensure its structural integrity and safety. With no federal funding or oversight, the dam's operation and management are solely the responsibility of the private owner, emphasizing the importance of proactive measures to mitigate potential hazards and protect the surrounding community and environment.
As a key component of the local water infrastructure, Collier Lake Dam plays a crucial role in water supply management for the region. With its historical significance and continued impact on the surrounding area, the dam serves as a reminder of the importance of sustainable water resource management and the need for ongoing monitoring and maintenance to ensure its continued functionality and safety in the face of changing climate conditions.
Year Completed |
1960 |
Dam Length |
774 |
Dam Height |
47 |
River Or Stream |
HENSHAW CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
47 |
Nid Storage |
320 |
Structural Height |
47 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
47 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Leon Rv Nr De Leon
|
0cfs |
Brazos Rv Nr Dennis
|
115cfs |
Paluxy Rv At Glen Rose
|
10cfs |
N Bosque Rv At Hico
|
6cfs |
Brazos Rv Nr Glen Rose
|
31cfs |
Sabana Rv Nr De Leon
|
0cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Collier Lake Dam