Plagge Dam Reservoir Report
Nearby: Clubine Dam Schlies Dam
Last Updated: December 16, 2025
Plagge Dam, located in Mapleton, Iowa, is a privately owned structure designed by the NRCS for fire protection, stock, or small fish pond purposes.
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Summary
Completed in 1998, this earth dam stands at a height of 36 feet with a length of 559 feet, providing a storage capacity of 62 acre-feet. The dam, situated on TR- Heisler Creek, serves low hazard potential with a moderate risk assessment rating of 3.
Managed by the Iowa Department of Natural Resources, Plagge Dam is state-regulated and permitted for inspection, enforcement, and operation. With its uncontrolled spillway and soil foundation, the dam offers a surface area of 4 acres and a drainage area of 0.25 square miles. Despite being in good condition and not yet rated for assessment, the dam presents a vital resource for water conservation and wildlife habitat in the Monona County region.
Water resource and climate enthusiasts can appreciate Plagge Dam for its strategic placement, efficient design, and contribution to local water management efforts. As a key feature in the Rock Island District, this earth dam serves as a valuable asset for fire protection, livestock watering, and ecological enhancement along TR- Heisler Creek. With its low hazard potential and moderate risk assessment, Plagge Dam stands as a testament to responsible water infrastructure development and sustainable resource utilization in the state of Iowa.
Year Completed |
1998 |
Dam Length |
559 |
Dam Height |
36 |
River Or Stream |
TR- HEISLER CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
0.25 |
Nid Storage |
62 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Maple River At Mapleton
|
323cfs |
West Fork Ditch At Hornick
|
80cfs |
Little Sioux River Near Turin
|
1040cfs |
Monona-Harrison Ditch Near Turin
|
158cfs |
Little Sioux River At Correctionville
|
327cfs |
Soldier River At Pisgah
|
112cfs |
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.
Plagge Dam