Purple Sage Ranch Lake Reservoir Report
Last Updated: December 5, 2025
Purple Sage Ranch Lake, located in Bandera, Texas, is a private fish and wildlife pond with a primary purpose of providing habitat for aquatic life.
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Summary
The dam, completed in 1947, is an earth structure with a height of 22 feet and a length of 1430 feet. The lake has a storage capacity of 342 acre-feet and a surface area of 34 acres, making it a valuable resource for recreation and wildlife conservation.
Managed by the Texas Commission on Environmental Quality (TCEQ), Purple Sage Ranch Lake has been inspected regularly to ensure its structural integrity and safety. The dam features an uncontrolled spillway and one outlet gate, with a maximum discharge of 1733 cubic feet per second. Despite being rated in fair condition as of the last assessment in 2015, the dam is considered a moderate risk due to its age and the potential consequences of failure. It is crucial for water resource and climate enthusiasts to monitor and support the continued maintenance and management of this important water feature.
With a drainage area of 0.8 square miles and a proximity to the TR-Medina River, Purple Sage Ranch Lake plays a vital role in the local ecosystem. Its strategic location and storage capacity help regulate water flow and provide a habitat for various species of fish and wildlife. As climate change continues to impact water resources, maintaining the integrity of dams like Purple Sage Ranch Lake is essential for ensuring sustainable water management practices and preserving the natural environment for future generations.
Years Modified |
1979 - Structural |
Year Completed |
1947 |
Dam Length |
1430 |
Dam Height |
22 |
River Or Stream |
TR-MEDINA RIVER |
Primary Dam Type |
Earth |
Surface Area |
34 |
Hydraulic Height |
22 |
Drainage Area |
0.8 |
Nid Storage |
342 |
Structural Height |
25 |
Outlet Gates |
Uncontrolled - 1 |
Hazard Potential |
Not Available |
Foundations |
Rock, Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Purple Sage Ranch Lake