Ellery Brockel Reservoir Report
Last Updated: December 13, 2025
Ellery Brockel, located in Campbell, South Dakota, is a privately-owned dam regulated by the South Dakota Department of Environment and Natural Resources (DENR).
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Summary
Constructed in 1949, this earth dam stands at a height of 30 feet, with a length of 430 feet, and has a storage capacity of 55 acre-feet. The dam is situated on the TR-MISSO river or stream and falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers.
Despite its low hazard potential and current "Not Rated" condition assessment, Ellery Brockel is subject to state regulation, inspection, and enforcement to ensure its safety and integrity. The dam has a normal storage capacity of 30 acre-feet and a maximum discharge capacity of 1600 cubic feet per second. While no emergency action plan (EAP) is currently in place, the dam has not been modified in recent years and is deemed to meet regulatory guidelines.
Water resource and climate enthusiasts interested in the history and technical details of Ellery Brockel will find this information valuable in understanding the importance of proper dam management and regulation. With its significant role in regulating water flow and storage in the region, the dam serves as a crucial infrastructure that requires ongoing monitoring and maintenance to prevent potential risks and ensure public safety.
Year Completed |
1949 |
Dam Length |
430 |
Dam Height |
30 |
River Or Stream |
TR-MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
30 |
Nid Storage |
55 |
Hazard Potential |
Low |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Oak Cr Near Wakpala Sd
|
10cfs |
Grand R At Little Eagle Sd
|
47cfs |
Moreau R Near Whitehorse Sd
|
35cfs |
Beaver Creek Bl Linton
|
39cfs |
Cannonball River At Breien
|
96cfs |
Cedar Creek Nr Raleigh
|
20cfs |
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.
Ellery Brockel