Jay A. Lake No.4 Reservoir Report
Nearby: Jay A. Lake No.5 Jay A. Lake No.3
Last Updated: December 12, 2025
Jay A.
°F
°F
mph
Wind
%
Humidity
Summary
Lake No.4 is a privately owned dam in Potter, South Dakota, with a low hazard potential and a height of 17 feet. Built in 1952, this earthen dam serves as a crucial water resource structure in the region, providing a storage capacity of 82 acre-feet for irrigation and other purposes. The dam has a normal storage level of 54 acre-feet and a maximum discharge capacity of 390 cubic feet per second.
Managed by the Natural Resources Conservation Service, Jay A. Lake No.4 is regulated, permitted, inspected, and enforced by the South Dakota Department of Environment and Natural Resources. Located within the St. Paul District of the US Army Corps of Engineers, this dam plays a vital role in water management and conservation efforts in the area. Despite being not rated for condition assessment, the dam is regularly monitored to ensure its safety and functionality for the surrounding community.
While the dam's emergency action plan and risk assessment details are currently unavailable, Jay A. Lake No.4 remains an essential infrastructure for water supply and climate resilience in South Dakota. With its strategic location and operational history, this dam continues to contribute to the sustainable management of water resources in the region, highlighting the importance of maintaining and monitoring such critical structures for the benefit of both people and the environment.
Year Completed |
1952 |
Dam Length |
405 |
Dam Height |
17 |
River Or Stream |
TR-MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
17 |
Nid Storage |
82 |
Hazard Potential |
Low |
Nid Height |
17 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Oak Cr Near Wakpala Sd
|
10cfs |
Grand R At Little Eagle Sd
|
47cfs |
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.
Jay A. Lake No.4