South Irrigation Dam Reservoir Report
Nearby: North Irrigation Dam Westagard Dam
Last Updated: December 13, 2025
South Irrigation Dam, located in Garnett, Kansas, is a privately owned earth dam designed by J.
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Summary
Dale Steward and completed in 1997. With a height of 11.7 feet and a length of 650 feet, this dam serves the primary purpose of irrigation, providing a storage capacity of 124.36 acre-feet and a normal storage level of 29.41 acre-feet. The dam is situated on Iantha Creek-TR and covers a surface area of 10.02 acres, with a drainage area of 0.14 square miles.
Despite being non-federally regulated, South Irrigation Dam has a low hazard potential and has not been given a condition assessment. The dam has not been inspected since March 2000, and there is no emergency action plan in place. However, with a maximum discharge of 690 cfs and a spillway width of 50 feet, the dam is designed to manage potential water flow efficiently. The risk assessment and management measures for the dam are currently unspecified, making it a point of interest for water resource and climate enthusiasts in the area.
South Irrigation Dam remains a critical infrastructure for irrigation in Anderson County, Kansas, providing essential water storage and distribution for agricultural purposes. This dam plays a vital role in water resource management in the region, emphasizing the need for regular inspections and maintenance to ensure its continued functionality and safety. As climate change continues to impact water availability and quality, the significance of structures like South Irrigation Dam in sustaining agricultural operations and local ecosystems becomes increasingly apparent.
Year Completed |
1997 |
Dam Length |
650 |
Dam Height |
11.7 |
River Or Stream |
IANTHA CREEK-TR |
Primary Dam Type |
Earth |
Surface Area |
10.02 |
Drainage Area |
0.14 |
Nid Storage |
124.36 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
12 |
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.
South Irrigation Dam