Greene No. 1 Reservoir Report
Nearby: Stromer Herman No.1 Neilsen #1
Last Updated: December 9, 2025
Greene No.
Weather Forecast
Next 5 Days
°F
°F
mph
Wind
%
Humidity
Summary
1, located in Mellette, South Dakota, is a privately owned earth dam completed in 1968 on the tributary of Cottonwood Creek. With a height of 25 feet and a length of 285 feet, this dam provides a storage capacity of 16 acre-feet for water resource management in the region. Maintained by the South Dakota Department of Environment and Natural Resources, Greene No. 1 is regulated, permitted, inspected, and enforced to ensure its structural integrity and compliance with state regulations.
Despite being classified as a low hazard potential structure, Greene No. 1 has not been rated for its condition assessment. The dam's emergency action plan status, inundation maps, and risk assessment details are also not available at the moment. While the dam's primary purpose and associated structures remain undisclosed, its location along the Cottonwood Creek tributary highlights its significance in managing water resources for the local community. As climate change continues to impact water availability and quality, structures like Greene No. 1 play a crucial role in safeguarding against potential risks and ensuring sustainable water management practices for the future.
Year Completed |
1968 |
Dam Length |
285 |
Dam Height |
25 |
River Or Stream |
TRIB-COTTONWOOD CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
25 |
Nid Storage |
16 |
Hazard Potential |
Low |
Nid Height |
25 |
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.
Greene No. 1