Shadehill Dike No. 2 Reservoir Report
Nearby: Shadehill Dike No. 1 Shadehill
Last Updated: December 6, 2025
Shadehill Dike No.
°F
°F
mph
Wind
%
Humidity
Summary
2, located in Shadehill, South Dakota, along the Grand River, is a Federal-owned structure managed by the Bureau of Reclamation for flood risk reduction purposes. Completed in 1951, this earth dam stands at 83 feet high and spans 1096 feet in length. With a storage capacity of 468,585 acre-feet, it plays a crucial role in protecting the surrounding area from potential flooding events.
Managed and regulated by the Bureau of Reclamation, Shadehill Dike No. 2 is part of a network of structures designed to mitigate flood risks and provide irrigation, recreation, and other benefits to the community. Despite its high hazard potential, regular inspections and risk assessments are conducted to ensure the safety and integrity of the dam. While spillways are not present, the dam's design and construction, including an arch core and rock foundation, contribute to its resilience in managing water levels and protecting downstream areas.
As climate change continues to impact water resources and weather patterns, structures like Shadehill Dike No. 2 are essential for safeguarding communities and ecosystems against potential disasters. With its critical role in flood risk reduction and water management, this Federal-owned dam stands as a testament to the importance of proactive infrastructure investments in the face of a changing climate.
Year Completed |
1951 |
Dam Length |
1096 |
Dam Height |
83 |
River Or Stream |
GRAND RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
58 |
Nid Storage |
468585 |
Structural Height |
83 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
83 |
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.
Shadehill Dike No. 2