F. Macijewske Reservoir Report
Nearby: Dewberry Dam Mike Welder
Last Updated: December 13, 2025
Situated in Dewey, South Dakota, the F.
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Summary
Macijewske dam stands proudly as a vital water resource structure along the TR-MOREAU river. Completed in 1938, this earth dam boasts a height of 22 feet and a length of 390 feet, providing a storage capacity of 264 acre-feet. Owned and regulated by a private entity, the dam is under the jurisdiction of the South Dakota Department of Environment and Natural Resources (DENR), ensuring regular inspections and enforcement of safety measures.
Despite its low hazard potential, the condition of F. Macijewske dam remains unrated, highlighting the need for a comprehensive assessment. While emergency action plans and risk management measures are currently unspecified, the dam serves as a crucial component of the local water management infrastructure. With its proximity to St. Paul District in South Dakota, the dam's role in flood control and water storage underscores its significance for both the environment and the community.
As a key feature in the region's water resource network, F. Macijewske dam plays a pivotal role in maintaining water levels and ensuring downstream water quality. With a capacity to handle maximum discharges of up to 2000 cubic feet per second, this earth dam stands as a testament to engineering excellence and the importance of sustainable water management practices. Despite its age, the dam continues to serve the community effectively, emphasizing the need for ongoing maintenance and assessment to safeguard its structural integrity for years to come.
Year Completed |
1938 |
Dam Length |
390 |
Dam Height |
22 |
River Or Stream |
TR-MOREAU |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Nid Storage |
264 |
Hazard Potential |
Low |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Moreau R Near Whitehorse Sd
|
35cfs |
Grand R At Little Eagle Sd
|
47cfs |
Oak Cr Near Wakpala Sd
|
10cfs |
Cedar Creek Nr Raleigh
|
20cfs |
Cannonball River Nr Raleigh
|
40cfs |
Moreau R Near Faith Sd
|
14cfs |
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.
F. Macijewske