Simonsen Subwatershed Lat B Sta 64+20 Reservoir Report
Last Updated: December 13, 2025
Located in Cherokee, Iowa, the Simonsen Subwatershed Lat B Sta 64+20 dam was completed in 1952 by the USDA NRCS for fire protection, stock, and small fish pond purposes.
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Summary
This earth dam stands at a height of 28 feet and spans 300 feet, providing a storage capacity of 57 acre-feet with a surface area of 1.6 acres. With a low hazard potential and moderate risk assessment, this dam on Rock Creek is regulated by the Iowa DNR and undergoes state permitting, inspection, and enforcement to ensure its safety and functionality.
Owned by the local government, this dam plays a crucial role in flood risk reduction for the surrounding area. With a drainage area of 0.86 square miles, the Simonsen Subwatershed Lat B Sta 64+20 dam is designed to manage water flow and protect downstream communities. Despite being uncontrolled, the dam's spillway width and discharge capabilities are not specified, highlighting the need for further assessment and potential modifications to enhance its efficiency and safety measures. As a key structure in the region, this dam serves as a vital resource for water management and climate resilience efforts.
As a significant component of the water infrastructure in Cherokee, Iowa, the Simonsen Subwatershed Lat B Sta 64+20 dam requires ongoing monitoring and maintenance to ensure its continued functionality and safety. With its primary purpose of fire protection and stock pond management, this earth dam provides essential storage capacity and flood risk reduction benefits for the local community. By adhering to state regulations and inspection protocols, the dam exemplifies responsible water resource management practices in the region, contributing to overall environmental sustainability and resilience in the face of changing climate conditions.
Year Completed |
1952 |
Dam Length |
300 |
Dam Height |
28 |
River Or Stream |
ROCK CREEK |
Primary Dam Type |
Earth |
Surface Area |
1.6 |
Drainage Area |
0.86 |
Nid Storage |
57 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Little Sioux River At Linn Grove
|
257cfs |
Floyd River At Alton
|
36cfs |
Floyd River At James
|
187cfs |
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
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.
Simonsen Subwatershed Lat B Sta 64+20