England #5 Reservoir Report
Nearby: England #2 England Bros. Number 1
Last Updated: December 9, 2025
England #5 is a privately owned dam located in Mellette, South Dakota, along the tributary of Cottonwood Offstream.
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Summary
Built in 1936, this earth dam stands at a height of 18 feet and stretches over 1,090 feet in length. With a storage capacity of 110 acre-feet, the dam serves the primary purpose of water resource management in the area.
Managed by the South Dakota Department of Environment and Natural Resources (DENR), England #5 is regulated and inspected regularly to ensure its structural integrity and compliance with state regulations. Despite being classified as having a low hazard potential, the dam's condition is currently listed as "Not Rated." Emergency action plans and risk assessments for the dam are still pending, highlighting the need for proactive measures to address any potential risks associated with the structure.
Overall, England #5 plays a crucial role in water management and conservation efforts in the region, serving as a key infrastructure for storing water and mitigating potential flood risks. As climate change continues to impact water resources, ensuring the safety and effectiveness of dams like England #5 is essential in adapting to evolving environmental conditions and securing water availability for future generations.
Year Completed |
1936 |
Dam Length |
1090 |
Dam Height |
18 |
River Or Stream |
TRIB COTTONWOOD OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
18 |
Nid Storage |
110 |
Hazard Potential |
Low |
Nid Height |
18 |
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.
England #5