Summary
This earth dam, with a height of 12 feet, provides a storage capacity of 100 acre-feet and covers a surface area of 287 acres. Despite its low hazard potential, the dam's condition assessment is rated as poor, with the last inspection in August 2019 revealing the need for maintenance and improvements.
Owned and regulated by the Minnesota Department of Natural Resources, South Rockwell Lake serves a primary purpose classified as "Other." Although its design features buttress core types and an unlisted or unknown foundation, the dam has not undergone modifications since its completion. With a drainage area of 1.2 square miles, this lake plays a crucial role in managing water resources in the Big Stone County area. Enthusiasts of water resources and climate will find South Rockwell Lake an intriguing site for exploration and study, given its unique characteristics and importance in the local ecosystem.
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15-Day Weather Outlook
Dam Height |
12 |
River Or Stream |
TWELVEMILE CR W BR-TR |
Surface Area |
287 |
Drainage Area |
1.2 |
Nid Storage |
100 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
12 |
Seasonal Comparison
5-Day Hourly Forecast Detail
Nearby Streamflow Levels
Minnesota River At Ortonville
|
256cfs |
Whetstone River Near Big Stone City
|
29300cfs |
Yellow Bank River Near Odessa
|
100cfs |
Little Minnesota River Near Peever
|
115cfs |
Bois De Sioux River Near White Rock
|
469cfs |
Pomme De Terre River At Appleton
|
564cfs |
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.
South Rockwell Lake