Probasco Dam Reservoir Report
Last Updated: December 7, 2025
Probasco Dam, located in Bloomfield, Iowa, is a privately owned structure designed by the SCS with a primary purpose of fire protection, stock, or small fish pond.
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Summary
Completed in 1982, this earth dam stands at a height of 24 feet and spans 370 feet in length, with a storage capacity of 70 acre-feet. The dam is situated on the TR-South Fox Creek and is regulated by the Iowa Department of Natural Resources, ensuring that it is regularly inspected and maintained to meet safety standards.
Despite its low hazard potential, Probasco Dam is considered to have a moderate risk level, with a condition assessment of "Not Rated." The dam has an uncontrolled spillway type and a surface area of 5.7 acres, serving the surrounding area with its water storage capabilities. While the dam has not been modified in recent years and lacks certain emergency preparedness measures such as an Emergency Action Plan (EAP), it remains an essential asset for fire protection and agricultural use in the region. Enthusiasts of water resources and climate will find Probasco Dam to be an intriguing case study in private dam ownership and management in the state of Iowa.
Year Completed |
1982 |
Dam Length |
370 |
Dam Height |
24 |
River Or Stream |
TR-SOUTH FOX CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.7 |
Drainage Area |
0.2 |
Nid Storage |
70 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Probasco Dam