Vollmar Dam Reservoir Report
Last Updated: December 14, 2025
Vollmar Dam, located in Correctionville, Iowa, was completed in 1957 and is owned by a private entity.
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Summary
The dam, designed by USDA NRCS, serves multiple purposes including fire protection, stock, small fish pond, and flood risk reduction. With a height of 33 feet and a length of 382 feet, Vollmar Dam has a normal storage capacity of 6 acre-feet and a maximum storage capacity of 87 acre-feet.
Managed by the Iowa Department of Natural Resources, Vollmar Dam is primarily an earth dam with a soil foundation, situated on the TR-Bacon Creek. The dam's hazard potential is rated as low, with a moderate risk assessment score of 3. While the last inspection date was in 1968, Vollmar Dam is state-regulated and has state-permitting, inspection, and enforcement in place to ensure its safety and functionality for the surrounding area.
This dam plays a crucial role in managing water resources and providing essential services to the community. For water resource and climate enthusiasts, Vollmar Dam represents a vital infrastructure piece that contributes to flood risk reduction and supports local wildlife habitats. Its unique design and purpose make it an interesting case study for those interested in sustainable water management practices and the intersection of human development with natural ecosystems.
Year Completed |
1957 |
Dam Length |
382 |
Dam Height |
33 |
River Or Stream |
TR-BACON CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.6 |
Drainage Area |
0.58 |
Nid Storage |
87 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
33 |
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 At Linn Grove
|
257cfs |
Missouri River At Sioux City
|
13700cfs |
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.
Vollmar Dam