Johnson Lake Reservoir Report
Nearby: Tomlin Lake Ingram Lake
Last Updated: December 13, 2025
Johnson Lake in Hickman, Tennessee, is a private water resource that offers a serene and picturesque escape for water resource and climate enthusiasts.
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Summary
With a surface area of 6 acres and a maximum storage capacity of 105 acre-feet, this earth dam serves a primary purpose of "Other" and is noted for its significant hazard potential. The dam stands at a structural height of 40 feet and spans 300 feet in length, providing a vital water source in the region.
Managed by the Nashville District of the US Army Corps of Engineers, Johnson Lake boasts an uncontrolled spillway type and has a history of regular inspections, with the last inspection conducted in October 2016. The risk assessment for the dam is rated as moderate, and while the condition assessment is currently listed as "Not Rated," the structure's overall risk management measures are in place. Despite its private ownership, Johnson Lake plays a crucial role in the local water ecosystem and serves as a valuable asset for the community.
As an essential component of the water infrastructure in Hickman, Tennessee, Johnson Lake offers a glimpse into the careful balance between water resource management and environmental stewardship. With its tranquil waters and lush surroundings, the lake provides a haven for wildlife and a recreational retreat for visitors. As climate change continues to impact water resources, Johnson Lake remains a symbol of resilience and adaptability in the face of evolving environmental challenges, making it a must-visit destination for those passionate about water conservation and sustainability.
Dam Length |
300 |
Primary Dam Type |
Earth |
Surface Area |
6 |
Nid Storage |
105 |
Structural Height |
40 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Nid Height |
40 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Copperas Branch Near Kingfield
|
1cfs |
Duck River At Hwy 100 At Centerville
|
1470cfs |
Piney River At Vernon
|
94cfs |
Duck River At Columbia
|
785cfs |
Harpeth River Below Franklin
|
109cfs |
Harpeth River At Franklin
|
86cfs |
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.
Johnson Lake