England #4 Reservoir Report

Last Updated: December 7, 2025

England #4 is a private dam located in Mellette, South Dakota, along the Trib Roundup Creek.


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Summary

Built in 1935, this earth dam stands at a height of 28 feet and has a storage capacity of 90 acre-feet. Despite being a low hazard potential structure, it is regulated by the South Dakota Department of Environment and Natural Resources (DENR) and undergoes regular inspections, permitting, and enforcement.

Owned and operated by a private entity, England #4 plays a crucial role in water resource management in the area. With a maximum discharge capacity of 566 cubic feet per second, this dam helps control flooding and provides water storage for various purposes. Although its condition is currently not rated, the dam has been serving the community for decades and continues to be a vital infrastructure in the region.

Situated within the St. Paul District of the US Army Corps of Engineers, England #4 contributes to the overall water management efforts in South Dakota. With its historical significance and operational efficiency, this dam stands as a testament to the importance of sustainable water resource practices in mitigating the impacts of climate change and ensuring water security for future generations.

Year Completed

1935

Dam Length

442

Dam Height

28

River Or Stream

TRIB ROUNDUP CREEK

Primary Dam Type

Earth

Hydraulic Height

28

Nid Storage

90

Hazard Potential

Low

Nid Height

28
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.