Jon R Coan Lake Dam Reservoir Report
Nearby: Pino Lake Dam W E Dennis Dam
Last Updated: December 5, 2025
Jon R Coan Lake Dam, located in Comanche, Texas, was completed in 1978 and serves as an essential irrigation source in the region.
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Summary
The dam, primarily designed for irrigation purposes, stands at a height of 23 feet with a storage capacity of 138 acre-feet. Although the dam does not have a spillway, it is equipped with a single outlet gate for water management.
Despite being privately owned, the dam is subject to state permitting and inspection requirements. Its condition assessment is currently not rated, and it has a high risk assessment level of 2. The dam's hazard potential is not available, and its emergency action plan status and risk management measures are also unknown. With its strategic location along the TR-Sabana River, Jon R Coan Lake Dam plays a vital role in supporting agricultural activities in the area and underscores the importance of sustainable water resource management in the face of climate variability.
Year Completed |
1978 |
Dam Height |
23 |
River Or Stream |
TR-SABANA RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
23 |
Nid Storage |
138 |
Structural Height |
23 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sabana Rv Nr De Leon
|
0cfs |
Copperas Ck At Fm 2247 Nr Comanche
|
2cfs |
Leon Rv Nr De Leon
|
0cfs |
Leon Rv Nr Hasse
|
2cfs |
Pecan Bayou Nr Cross Cut
|
436cfs |
Big Sandy Ck Abv Breckenridge
|
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.
Jon R Coan Lake Dam