Walter Dennis Irrigation Reservoir Report
Nearby: Sd Noname 187 Belvidere Dam
Last Updated: December 6, 2025
Walter Dennis Irrigation, located in Jackson, South Dakota, is a privately owned irrigation structure that plays a crucial role in water resource management in the area.
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Summary
Completed in 1960, this earth dam stands at a height of 23 feet and has a storage capacity of 115 acre-feet. The dam serves as a vital tool for water conservation and agricultural irrigation in the region, with the ability to discharge up to 1890 cubic feet per second.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Walter Dennis Irrigation is subject to state regulations, inspections, and enforcement to ensure its safe and efficient operation. Despite its low hazard potential and current condition assessment of "Not Rated", the dam remains a key component in water supply management for the surrounding area. With the support of the Natural Resources Conservation Service as the designer, this structure continues to contribute to sustainable water use and climate resilience in the region.
While specifics like inspection dates and emergency preparedness measures are not detailed in the available data, Walter Dennis Irrigation stands as a testament to the collaboration between private owners and state agencies in effectively managing water resources. As climate change impacts water availability and quality, structures like this play a crucial role in ensuring reliable water supply for agriculture, communities, and ecosystems in South Dakota.
Year Completed |
1960 |
Dam Length |
520 |
Dam Height |
23 |
River Or Stream |
TR WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
23 |
Nid Storage |
115 |
Hazard Potential |
Low |
Nid Height |
23 |
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.
Walter Dennis Irrigation