Patterson Holding Reservoir Report
Nearby: L. Ingalls No.1 Raymond Hanzlik
Last Updated: December 6, 2025
Patterson Holding is a privately owned dam located in Meade, South Dakota, with a primary purpose that remains unspecified.
°F
°F
mph
Wind
%
Humidity
Summary
The dam, constructed in 1955 by the Natural Resources Conservation Service, is classified as an earth dam type, standing at a height of 20 feet and stretching 947 feet in length. With a storage capacity of 174 acre-feet, Patterson Holding primarily regulates the flow of the TR-SULPHNot Rated Creek and has a low hazard potential, as assessed by authorities.
Despite being under state jurisdiction and regulation by the South Dakota Department of Environment and Natural Resources, Patterson Holding's condition assessment is currently listed as 'Not Rated'. The dam has not undergone recent inspections, and no emergency action plan (EAP) has been prepared or updated. With a maximum discharge capacity of 12,480 cubic feet per second, Patterson Holding serves as a critical infrastructure for water resource management in the area, albeit with limited information available on its current risk management measures or inundation mapping status. As a structure vital for climate resilience and water conservation efforts, further assessment and oversight may be necessary to ensure its continued safety and functionality.
Year Completed |
1955 |
Dam Length |
947 |
Dam Height |
20 |
River Or Stream |
TR-SULPHNot Rated CREEK |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
174 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Faith Sd
|
14cfs |
Belle Fourche R Near Sturgis Sd
|
34cfs |
Horse Cr Above Vale Sd
|
13cfs |
Belle Fourche River Near Elm Springs
|
17900cfs |
Whitewood Cr Above Vale Sd
|
16cfs |
Cheyenne R Near Plainview Sd
|
0cfs |
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.
Patterson Holding