Duval County Ranch Colorado Tank Dam Reservoir Report
Last Updated: December 5, 2025
The Duval County Ranch Colorado Tank Dam, located in Duval, Texas, was completed in 1969 and serves multiple purposes including fire protection, stock watering, and small fish pond management.
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Summary
This private earth dam, with a structural height of 9 feet and a length of 650 feet, is designed for maximum storage capacity of 227 acre-feet. Situated on Ygnacio Creek and managed by the Fort Worth District, this dam plays a crucial role in water resource management in the region.
Despite its small size, the Duval County Ranch Colorado Tank Dam poses a high risk (2) due to its condition being not rated and lacking certain emergency preparedness measures. The dam has no spillway and is equipped with only one outlet gate, making it important for ongoing inspection and maintenance to ensure its structural integrity. With no state jurisdiction or enforcement, it is vital for the private owner to adhere to state permitting requirements and conduct regular inspections to mitigate potential hazards and ensure the safety of downstream communities and ecosystems.
As a focal point for water resource and climate enthusiasts, the Duval County Ranch Colorado Tank Dam exemplifies the intersection of human infrastructure and environmental stewardship. Its role in providing essential water services while balancing the need for safety and risk management underscores the complex challenges faced in sustainable water resource management. With its historical significance and ongoing relevance in the region, this dam serves as a reminder of the delicate balance between human needs and environmental protection in the face of a changing climate.
Year Completed |
1969 |
Dam Length |
650 |
Dam Height |
9 |
River Or Stream |
YGNACIO CREEK |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
9 |
Nid Storage |
227 |
Structural Height |
9 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
9 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
San Casimiro Ck Nr Freer
|
0cfs |
Nueces Rv Nr Tilden
|
0cfs |
Lagarto Ck Nr George West
|
0cfs |
Frio Rv At Tilden
|
0cfs |
San Fernando Ck At Alice
|
1cfs |
San Miguel Ck Nr Tilden
|
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.
Duval County Ranch Colorado Tank Dam