Diller Lake Dam Reservoir Report
Last Updated: December 5, 2025
Diller Lake Dam, located in Shackelford, Texas, was completed in 1960 and serves as a vital water supply source for the area.
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Summary
This private-owned earth dam stands at a height of 15 feet with a length of 490 feet, holding a maximum storage capacity of 150 acre-feet. Despite its solid buttress core type, the dam lacks a spillway, potentially posing a high risk in case of overflow events.
The dam, situated on the TR-Hubbard Creek, is not regulated by the state but undergoes regular inspections and permitting processes. With its close proximity to the surrounding community, the dam's condition assessment remains unrated, highlighting the need for enhanced risk management measures. Despite its historical importance in water supply, the lack of flood control infrastructure raises concerns for potential hazards and necessitates the development of emergency action plans to mitigate risks for nearby residents and the environment.
As a significant water resource structure in Texas, Diller Lake Dam presents a blend of historical significance and current challenges in terms of safety and regulatory oversight. The absence of a spillway and limited hazard potential information call for increased attention to potential risks and the implementation of robust risk management strategies to ensure the safety of the dam and the surrounding community in the face of changing climate patterns and water resource demands.
Year Completed |
1960 |
Dam Length |
490 |
Dam Height |
15 |
River Or Stream |
TR-HUBBARD CREEK |
Primary Dam Type |
Earth |
Surface Area |
15 |
Hydraulic Height |
15 |
Nid Storage |
150 |
Structural Height |
15 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Deep Ck At Moran
|
0cfs |
Hubbard Ck Bl Albany
|
0cfs |
Big Sandy Ck Abv Breckenridge
|
0cfs |
Clear Fk Brazos Rv At Nugent
|
11cfs |
Cedar Ck At Ih 20
|
0cfs |
Clear Fk Brazos Rv At Lueders
|
22cfs |
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.
Diller Lake Dam