Wientjes Bros No.1 Reservoir Report
Last Updated: December 13, 2025
Wientjes Bros No.1 is a privately owned earth dam located in Campbell, South Dakota, completed in 1971.
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Summary
It stands at a height of 29 feet and has a storage capacity of 60 acre-feet, with a normal storage level of 40 acre-feet. This dam plays a vital role in water resource management in the area, with a maximum discharge capacity of 840 cubic feet per second. Despite its age, the dam is classified as having a low hazard potential and its condition is currently rated as 'Not Rated'.
Managed by the Natural Resources Conservation Service, Wientjes Bros No.1 is subject to state regulations and inspections, ensuring its continued safety and functionality. While it has not undergone recent inspections or condition assessments, its low hazard potential indicates a relatively low risk to surrounding areas. The dam's purpose and associated structures are unspecified, but its presence contributes to the overall water infrastructure in the region.
Located in the St. Paul District and under the jurisdiction of the South Dakota Department of Environment and Natural Resources, Wientjes Bros No.1 serves as a key component of the local water management system. With its low hazard potential and historic significance dating back to 1971, this dam remains a noteworthy structure for water resource and climate enthusiasts to study and appreciate in the context of South Dakota's water infrastructure.
Year Completed |
1971 |
Dam Length |
270 |
Dam Height |
29 |
River Or Stream |
TR-MISSONot RatedI |
Primary Dam Type |
Earth |
Hydraulic Height |
29 |
Nid Storage |
60 |
Hazard Potential |
Low |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Oak Cr Near Wakpala Sd
|
10cfs |
Grand R At Little Eagle Sd
|
47cfs |
Beaver Creek Bl Linton
|
39cfs |
Moreau R Near Whitehorse Sd
|
35cfs |
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.
Wientjes Bros No.1