Winkowitsch Dam Reservoir Report
Nearby: Wedeking Dam Heeren Dam
Last Updated: December 13, 2025
Winkowitsch Dam, located in Sinclair, Iowa, was completed in 1967 by the USDA NRCS and is privately owned.
°F
°F
mph
Wind
%
Humidity
Summary
This earth dam stands at a height of 24 feet and spans 970 feet along TR-SLIMS CREEK, with a storage capacity of 84 acre-feet. The primary purposes of this structure are for fire protection, stock, or as a small fish pond, serving as a vital resource for the local community.
With a low hazard potential and a moderate risk assessment, Winkowitsch Dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its safety and functionality. Despite its condition not being rated, the dam continues to provide essential water management services for the area. The surrounding area includes a drainage area of 0.23 square miles and a surface area of 9 acres, making it a valuable asset for water conservation and management in Butler County, Iowa.
As a key feature in the local water infrastructure, Winkowitsch Dam plays a crucial role in maintaining water resources for fire protection and agricultural needs. Its construction and operation are overseen by the Natural Resources Conservation Service, ensuring that the dam meets regulatory standards and operates effectively. With a history dating back to the late 1960s, this dam stands as a testament to the importance of sustainable water management practices in the region, benefiting both the environment and the local community.
Year Completed |
1967 |
Dam Length |
970 |
Dam Height |
24 |
River Or Stream |
TR-SLIMS CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Drainage Area |
0.23 |
Nid Storage |
84 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Beaver Creek At New Hartford
|
123cfs |
Shell Rock River At Shell Rock
|
484cfs |
West Fork Cedar River At Finchford
|
502cfs |
Cedar River At Janesville
|
711cfs |
Cedar River At Waverly
|
436cfs |
Cedar River At Cedar Falls
|
1880cfs |
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.
Winkowitsch Dam