Joe Gesinger No.1 Reservoir Report
Nearby: C.J. Larson No.1 John Gesinger No.1
Last Updated: December 13, 2025
Joe Gesinger No.1 is a privately owned dam located in Dewey, South Dakota, along the TR MOREAU river.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1940, this earth dam stands at a height of 20 feet and has a length of 700 feet. With a storage capacity of 190 acre-feet, it serves the purpose of water resource management in the area, with a maximum discharge rate of 600 cubic feet per second.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), Joe Gesinger No.1 has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. While the dam has not been inspected recently, it is still regulated, permitted, inspected, and enforced by state agencies, ensuring its safety and compliance with regulations. Despite its age, the dam continues to play a vital role in the local water supply and flood control efforts.
Although Joe Gesinger No.1 does not have associated structures or a comprehensive emergency action plan in place, its location and design contribute to its overall low-risk profile. With no major modifications in recent years, the dam remains a key feature in the St. Paul District's water management infrastructure. As a significant part of the region's water resource system, Joe Gesinger No.1 stands as a testament to the importance of maintaining and monitoring our water infrastructure for the benefit of both people and the environment.
Year Completed |
1940 |
Dam Length |
700 |
Dam Height |
20 |
River Or Stream |
TR MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
190 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Grand R At Little Eagle Sd
|
47cfs |
Oak Cr Near Wakpala Sd
|
10cfs |
Bad R Near Fort Pierre Sd
|
7cfs |
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.
Joe Gesinger No.1