Heeren Dam Reservoir Report
Last Updated: December 14, 2025
Heeren Dam, located in Dumont, Iowa, is a privately owned earth dam built in 1969 by the USDA NRCS.
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Summary
The dam's primary purpose is for fire protection, stock, or as a small fish pond. It stands at a height of 20 feet and stretches 700 feet in length, with a storage capacity of 70 acre-feet. The dam is situated on the TR-Hargrave Creek, within the jurisdiction of the Iowa DNR, and is regulated, permitted, inspected, and enforced by the state.
With a low hazard potential and a moderate risk assessment rating of 3, Heeren Dam has not been formally rated for its condition assessment. It does not have an emergency action plan in place or updated inundation maps. Despite these limitations, the dam continues to serve its intended purposes effectively and plays a key role in water resource management in the area. For water resource and climate enthusiasts, Heeren Dam offers a fascinating case study in the intersection of private ownership, state regulation, and the importance of infrastructure for fire protection and ecological conservation.
Year Completed |
1969 |
Dam Length |
700 |
Dam Height |
20 |
River Or Stream |
TR-HARGRAVE CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Drainage Area |
0.3 |
Nid Storage |
70 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Shell Rock River At Shell Rock
|
484cfs |
Beaver Creek At New Hartford
|
123cfs |
Cedar River At Charles City
|
450cfs |
Winnebago River At Mason City
|
166cfs |
West Fork Cedar River At Finchford
|
502cfs |
Iowa River Near Rowan
|
195cfs |
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.
Heeren Dam