Randy Grgurich Dam Reservoir Report
Nearby: Rosa Dam Williamson Pond Dam
Last Updated: December 13, 2025
Randy Grgurich Dam, located in Lucas County, Iowa, is a privately owned structure primarily designed for grade stabilization along the TR - Little White Breast river or stream.
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Summary
Completed in 2014 by the USDA NRCS, this earth dam stands at a height of 28 feet and spans 330 feet in length. With a storage capacity of 17 acre-feet, it serves multiple purposes including grade stabilization, recreation, and water supply for the local community.
Despite its low hazard potential, the dam is regulated and inspected by the Iowa DNR, ensuring its safety and compliance with state standards. The spillway, which is uncontrolled, has a width of 18 feet, and the outlet gates are also uncontrolled. The risk assessment for the dam is moderate, with a DSAC assigned date yet to be determined. Although the condition assessment is currently not rated, the dam is equipped with emergency action plans in case of any unforeseen events, with emergency contacts and inundation maps yet to be prepared.
Overall, Randy Grgurich Dam is a crucial structure in the area, providing essential services while also being mindful of the potential risks associated with its operation. Its completion in 2014 marked a milestone in water resource management and climate resilience efforts in Lucas County, Iowa. With continued monitoring and maintenance, the dam remains a vital asset for the community, balancing the need for water supply, recreation, and environmental protection.
Year Completed |
2014 |
Dam Length |
330 |
Dam Height |
28 |
River Or Stream |
TR - Little White Breast |
Primary Dam Type |
Earth |
Surface Area |
1 |
Drainage Area |
0.07 |
Nid Storage |
17 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
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.
Randy Grgurich Dam