Cohenour Reservoir Reservoir Report
Nearby: Macomber Reservoir Koa Lake Dam
Last Updated: December 6, 2025
Cohenour Reservoir, located in La Salle, Texas, is a private irrigation reservoir built in 1904 on the Nueces River.
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Summary
With a dam height of 8 feet and a storage capacity of 320 acre-feet, this reservoir serves as a vital water resource for agricultural purposes in the region. Despite being privately owned, the reservoir is subject to state permitting and inspection, ensuring that it meets necessary safety and regulatory standards.
Although the reservoir has not been updated or inspected since 1978, it continues to provide water for irrigation purposes with a normal storage capacity of 200 acre-feet. The risk assessment for Cohenour Reservoir is categorized as high, indicating the potential for hazards associated with the structure. While the spillway type is listed as "None", the reservoir's condition assessment and emergency preparedness status are marked as "Not Rated" and "Not Available" respectively, implying a need for further evaluation and monitoring of safety measures.
Climate and water resource enthusiasts interested in Cohenour Reservoir can appreciate its historical significance as a vital irrigation source in Texas. The reservoir's location on the Nueces River, along with its private ownership and state-regulated status, highlights the importance of sustainable water management practices in the region. As efforts to evaluate and address potential risks associated with the reservoir continue, stakeholders are encouraged to stay informed about its condition and emergency preparedness measures to ensure the safety and sustainability of this essential water resource.
Year Completed |
1904 |
Dam Length |
465 |
Dam Height |
8 |
River Or Stream |
NUECES RIVER |
Primary Dam Type |
Buttress |
Hydraulic Height |
8 |
Nid Storage |
320 |
Structural Height |
8 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Nueces Rv At Cotulla
|
0cfs |
Frio Rv Nr Derby
|
0cfs |
Nueces Rv Nr Asherton
|
0cfs |
San Casimiro Ck Nr Freer
|
0cfs |
Nueces Rv Nr Tilden
|
0cfs |
Frio Rv At 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.
Cohenour Reservoir