Lake At Southwick - 199th & Mission Rd Reservoir Report
Nearby: Spring Lake Dam Recreational Dam
Last Updated: December 6, 2025
Lake At Southwick, located at 199th & Mission Rd in Johnson, Kansas, is a privately owned reservoir primarily used for fire protection, stock, and recreational purposes.
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Summary
Constructed in 1970 by the USDA NRCS, this earth dam stands at a height of 15 feet and stretches 1500 feet in length, with a storage capacity of 134.2 acre-feet and a surface area of 14.4 acres. Despite its significant hazard potential and poor condition assessment, the dam has a moderate risk level and is regulated by the Kansas Dept. of Agriculture.
The dam's location near the CAMP BRANCH-TR river/stream and its controlled spillway with a width of 55 feet ensure effective water management and downstream safety. With a drainage area of 0.17 square miles and a maximum discharge capacity of 339 cubic feet per second, Lake At Southwick plays a crucial role in mitigating flood risks and providing essential water resources to the surrounding area. However, the dam's condition and hazard potential highlight the need for regular inspections and potential risk management measures to ensure the safety of the community and ecosystem.
Overall, Lake At Southwick serves as a vital water resource for fire protection, livestock, and recreational activities in the region. While facing challenges in terms of condition assessment and hazard potential, the dam's strategic location and design features make it a key element in water management and climate resilience efforts in Johnson, Kansas. Continued monitoring and maintenance will be essential to safeguarding the dam's functionality and ensuring the safety of downstream communities and ecosystems.
Year Completed |
1970 |
Dam Length |
1500 |
Dam Height |
15 |
River Or Stream |
CAMP BRANCH-TR |
Primary Dam Type |
Earth |
Surface Area |
14.4 |
Hydraulic Height |
15 |
Drainage Area |
0.17 |
Nid Storage |
134.2 |
Structural Height |
15 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
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.
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