Nelson-Johnson Reservoir Report
Last Updated: December 13, 2025
Nelson-Johnson, located in Gibson, Georgia, is a private fish and wildlife pond constructed in 1952 by the USDA NRCS.
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Summary
This earth dam has a height of 21 feet and a length of 480 feet, providing a storage capacity of 51 acre-feet. The primary purpose of Nelson-Johnson is to support fish and wildlife habitat, with additional benefits for fire protection and stock pond usage.
The dam's spillway is uncontrolled, with a width of 70 feet, and the hazard potential is rated as low, with a moderate risk assessment score of 3. While the condition assessment is not available, the dam is designated as non-USACE and does not have an emergency action plan in place. Despite these limitations, Nelson-Johnson remains a valuable resource for the local ecosystem and water management in Warren County.
Water resource and climate enthusiasts would find Nelson-Johnson to be an intriguing site, showcasing the intersection of human development and environmental conservation. Its modest size and low hazard potential make it an interesting case study for sustainable water management practices, highlighting the importance of maintaining and monitoring small-scale water infrastructure for both ecological and human benefit. The history and design details of Nelson-Johnson offer valuable insights into the challenges and opportunities of managing water resources in a changing climate.
Year Completed |
1952 |
Dam Length |
480 |
Dam Height |
21 |
River Or Stream |
Tr- Rocky Comfort |
Primary Dam Type |
Earth |
Drainage Area |
0.23 |
Nid Storage |
51 |
Hazard Potential |
Low |
Nid Height |
21 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Nelson-Johnson