Tilley Lake Dam No 1 Reservoir Report
Nearby: Tilley Lake Dam No 2 4b Farms Dam
Last Updated: December 5, 2025
Tilley Lake Dam No 1 is a privately owned earth dam located in Comanche, Texas, with a primary purpose of irrigation.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, situated on the TR-Sabana River, has a height of 12 feet and a storage capacity of 72 acre-feet. Despite being unregulated by the state, the dam has state permitting and inspection requirements in place to ensure its safety and functionality.
The dam poses a high risk due to its condition assessment being not rated and its hazard potential being not available. With no spillway and limited information on its emergency action plan and risk management measures, there are concerns about the safety of the structure. However, with proper maintenance and adherence to inspection guidelines, the dam can continue to serve its purpose of providing irrigation water to the surrounding area.
As water resource and climate enthusiasts, it is important to monitor the condition of Tilley Lake Dam No 1 and advocate for the implementation of risk management measures to mitigate potential hazards. By staying informed and actively promoting the safety of such infrastructure, we can contribute to the sustainability and resilience of our water resources in the face of changing climate conditions.
Dam Height |
12 |
River Or Stream |
TR-SABANA RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
12 |
Nid Storage |
72 |
Structural Height |
12 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sabana Rv Nr De Leon
|
0cfs |
Leon Rv Nr De Leon
|
0cfs |
Copperas Ck At Fm 2247 Nr Comanche
|
2cfs |
Leon Rv Nr Hasse
|
2cfs |
Pecan Bayou Nr Cross Cut
|
436cfs |
N Bosque Rv At Hico
|
6cfs |
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.
Tilley Lake Dam No 1