Garst Supply Dam Reservoir Report
Nearby: Keyser Wetland Dam Garst Dam
Last Updated: December 13, 2025
Garst Supply Dam, located in Coon Rapids, Iowa, is a privately owned earth dam completed in 1995 by the USDA NRCS.
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Summary
This multipurpose dam serves primarily for fire protection, stock, or as a small fish pond. With a dam height of 32 feet and a length of 398 feet, it has a storage capacity of 24 acre-feet and a surface area of 1.5 acres. The dam is regulated by the Iowa DNR and is considered to have a low hazard potential.
Situated on the TR- Middle Raccoon River, Garst Supply Dam plays a crucial role in managing water resources in the area. Despite being uncontrolled, the dam's spillway type ensures the safety of the structure. With a moderate risk assessment rating, the dam is subject to state inspections, maintenance, and enforcement. Its strategic location in a drainage area of 0.13 square miles highlights its importance in flood control and water conservation efforts in the region.
Overall, Garst Supply Dam stands as a vital asset for fire protection, livestock, and environmental conservation in Carroll County, Iowa. Its construction and management by the Natural Resources Conservation Service exemplify a commitment to sustainable water resource management and climate resilience in the area. By serving multiple purposes and meeting regulatory standards, the dam underscores the importance of proactive infrastructure measures in safeguarding communities and ecosystems against water-related risks.
Year Completed |
1995 |
Dam Length |
398 |
Dam Height |
32 |
River Or Stream |
TR- MIDDLE RACCOON RIVER |
Primary Dam Type |
Earth |
Surface Area |
1.5 |
Drainage Area |
0.13 |
Nid Storage |
24 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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.
Garst Supply Dam