Nelson Dam Reservoir Report
Nearby: Grundman Dam Dessel Dam
Last Updated: December 24, 2025
Nelson Dam, located in Cherokee, Iowa, is a privately owned structure designed by USDA NRCS with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Completed in 1996, the dam stands at a height of 39 feet and spans a length of 255 feet, with a storage capacity of 58 acre-feet. Situated on TR- Mill Creek, the dam serves as a vital resource for local water management and agricultural activities in the region.
Despite its low hazard potential and moderate risk assessment, Nelson Dam is not currently rated for its condition. However, it is regulated by the Iowa DNR and undergoes regular state inspections, permitting, and enforcement. The dam's uncontrolled spillway and soil foundation contribute to its structural integrity, providing essential water storage and flood protection services for the surrounding area. With its strategic location and efficient design, Nelson Dam plays a crucial role in maintaining water resources and mitigating potential climate-related risks in the region.
Managed by the Natural Resources Conservation Service, Nelson Dam exemplifies a successful partnership between private ownership and state oversight in ensuring water resource sustainability. As a key infrastructure for fire protection, livestock, and aquatic life support, the dam's strategic placement and efficient operation contribute to the overall resilience of the local ecosystem. With continued monitoring and maintenance efforts, Nelson Dam remains a valuable asset for water resource and climate enthusiasts, showcasing the importance of proactive management in addressing environmental challenges and promoting long-term sustainability.
Year Completed |
1996 |
Dam Length |
255 |
Dam Height |
39 |
River Or Stream |
TR- MILL CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.5 |
Drainage Area |
0.3 |
Nid Storage |
58 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
39 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Linn Grove
|
257cfs |
Floyd River At Alton
|
36cfs |
Little Sioux River At Correctionville
|
327cfs |
Ocheyedan River Near Spencer
|
59cfs |
Floyd River At James
|
187cfs |
Perry Creek Near Milnerville
|
25cfs |
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.
Nelson Dam