Walter Dennis Irrigation Reservoir Report
Nearby: Belvidere Dam Sd Noname 187
Last Updated: December 6, 2025
Walter Dennis Irrigation in South Dakota is a privately-owned earth dam that was completed in 1960.
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Summary
It serves as a vital water resource for the surrounding area, with a storage capacity of 830 acre-feet and a normal storage level of 67 acre-feet. Situated on the TR-White River, the dam plays a crucial role in regulating water flow and providing irrigation for agricultural purposes in the region.
Managed by the Natural Resources Conservation Service, Walter Dennis Irrigation is state-regulated and subject to inspection, permitting, and enforcement to ensure its safe operation. With a low hazard potential and a condition assessment of "Not Rated," the dam has not been assessed for its current structural integrity. However, it remains a key infrastructure for water management in Jackson County, South Dakota, contributing to the overall water resource management and climate resilience efforts in the area.
As an important component of the local water infrastructure, Walter Dennis Irrigation represents a historical investment in water resources that continues to support the agricultural community in the region. With its strategic location on the TR-White River and its ability to store and regulate water flow, the dam plays a critical role in ensuring water security and sustainable irrigation practices for farmers in South Dakota.
Year Completed |
1960 |
Dam Length |
100 |
Dam Height |
21 |
River Or Stream |
TR-WHITE RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
16 |
Nid Storage |
830 |
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.
Walter Dennis Irrigation