Cedar 19 Reservoir Report
Nearby: Cedar 19 (Nid) Sd Noname 116
Last Updated: December 6, 2025
Cedar 19 is a federally owned dam located in Jackson, South Dakota, along the Dry Draw river.
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Summary
Built in 1937, this dam stands at a height of 17 feet and has a storage capacity of 66 acre-feet. With a low hazard potential and a moderate risk assessment rating of 3, Cedar 19 plays a crucial role in managing water resources in the area.
Despite not being regulated or permitted by the state, Cedar 19 serves as a vital infrastructure for water control and management in the region. The dam has a spillway type classified as 'Uncontrolled' and is constructed on a soil foundation. Although the condition assessment is listed as 'Not Rated,' the risk management measures for Cedar 19 are not specified, indicating the need for further evaluation and potential upgrades to ensure its safety and efficacy in the face of evolving climate conditions.
With its strategic location and historical significance, Cedar 19 is a key element in the water resource infrastructure of South Dakota. As climate change continues to impact water availability and quality, maintaining and enhancing the functionality of dams like Cedar 19 will be essential for sustainable water management practices in the region.
Year Completed |
1937 |
Dam Length |
17 |
Dam Height |
17 |
River Or Stream |
DRY DRAW |
Hydraulic Height |
16 |
Nid Storage |
66 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
17 |
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.
Cedar 19