Smith Andy Number 1 Reservoir Report
Nearby: Krogman No.1 Krogman #4
Last Updated: December 14, 2025
Smith Andy Number 1, located in Mellette, South Dakota, is a privately owned earth dam completed in 1968 with a primary purpose of offstream water storage for Pine Creek.
°F
°F
mph
Wind
%
Humidity
Summary
Managed by the Natural Resources Conservation Service, this dam stands at a height of 28 feet and has a storage capacity of 20 acre-feet. With a low hazard potential and a condition assessment of 'Not Rated', this structure plays a crucial role in water resource management in the region.
Despite not being regulated by federal agencies, Smith Andy Number 1 falls under the jurisdiction of the South Dakota Department of Environment and Natural Resources for permitting, inspection, and enforcement. With a maximum discharge of 98 cubic feet per second, this dam ensures controlled water release during high flow events to mitigate flooding risks downstream. Although the dam has not been rated for condition assessment, its low hazard potential suggests a relatively stable and secure structure for water storage and management.
As climate change continues to impact water resources and hydrological patterns, structures like Smith Andy Number 1 play a vital role in ensuring water availability and flood control in the region. With proper management and oversight from state agencies, this dam serves as a key asset for maintaining water security and resilience in the face of changing environmental conditions.
Year Completed |
1968 |
Dam Length |
295 |
Dam Height |
28 |
River Or Stream |
PINE CREEK OFFSTREAM |
Primary Dam Type |
Earth |
Hydraulic Height |
28 |
Nid Storage |
20 |
Hazard Potential |
Low |
Nid Height |
28 |
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.
Smith Andy Number 1