Calvin Lake Dam Reservoir Report
Nearby: Campbell Lake Dam Conner Lake Dam
Last Updated: December 5, 2025
Calvin Lake Dam, located in Archer County, Texas, stands as a testament to engineering and water resource management since its completion in 1964.
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Summary
This private-owned dam, with a height of 15 feet and a length of 600 feet, serves as a crucial structure on the TR-West Fork Trinity River, providing a storage capacity of 108-acre feet. Despite its modest size, Calvin Lake Dam plays a vital role in regulating water flow and ensuring water availability for various purposes.
While not regulated by the state, Calvin Lake Dam is equipped with state permitting and inspection mechanisms to ensure its structural integrity and safe operation. With no spillway and a hazard potential labeled as "Not Available," the dam presents a unique challenge for risk assessment and management. However, its high risk rating (2) underscores the importance of maintaining and monitoring this earth dam to prevent any potential hazards or failures that could impact the surrounding environment and community.
As climate change continues to pose threats to water resources, structures like Calvin Lake Dam become even more critical in managing water supply and mitigating risks. With a private ownership model and a primary purpose listed as "Other," Calvin Lake Dam represents a blend of historical significance and contemporary challenges in water resource management. As climate enthusiasts and water resource advocates, monitoring and ensuring the safety and efficiency of structures like Calvin Lake Dam are essential in adapting to the changing climate and safeguarding our water resources for future generations.
Year Completed |
1964 |
Dam Length |
600 |
Dam Height |
15 |
River Or Stream |
TR-WEST FORK TRINITY RIVER |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
15 |
Nid Storage |
108 |
Structural Height |
15 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
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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.
Calvin Lake Dam