Peterson Dam Reservoir Report
Last Updated: December 15, 2025
Peterson Dam, located in Anthon, Woodbury County, Iowa, is a privately owned structure designed by USDA NRCS and completed in 1966.
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Summary
The dam's primary purpose is for fire protection, stock, or a small fish pond, with a height of 30 feet and a length of 494 feet. It has a storage capacity of 64 acre-feet, with a normal storage of 33 acre-feet and a surface area of 5.4 acres. The dam is situated on TR-BIG CREEK and is regulated by the Iowa DNR.
With a low hazard potential and a moderate risk assessment rating, Peterson Dam plays a crucial role in water resource management in the region. It is equipped with an uncontrolled spillway and is inspected, regulated, and permitted by the state authorities. Despite not having a current condition assessment rating, the dam remains a vital asset for the community in terms of water supply, fire protection, and recreational opportunities.
As a focal point for water enthusiasts and climate advocates, Peterson Dam serves as a reminder of the importance of maintaining and managing water resources effectively. Its presence not only supports local agriculture and wildlife but also contributes to the overall resilience of the area's water infrastructure. With ongoing monitoring and attention to risk management measures, Peterson Dam continues to be a valuable asset in ensuring water security and environmental sustainability in the region.
Year Completed |
1966 |
Dam Length |
494 |
Dam Height |
30 |
River Or Stream |
TR-BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.4 |
Drainage Area |
0.31 |
Nid Storage |
64 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Correctionville
|
327cfs |
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Floyd River At James
|
187cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
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.
Peterson Dam