Henry Dam Reservoir Report
Last Updated: December 14, 2025
Henry Dam, located in Pottawattamie, Iowa, is a privately owned earth dam completed in 1990 for fire protection, stock, and small fish pond purposes.
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Summary
With a height of 27 feet and a length of 600 feet, the dam has a storage capacity of 116 acre-feet and covers a surface area of 5.3 acres. It is regulated by the Iowa Department of Natural Resources and is subject to regular inspections, permitting, and enforcement to ensure its safety and compliance with state regulations.
The dam, designed by the Soil Conservation Service (SCS), is situated on TR-FARM CREEK and managed by the primary owner, a private entity. Despite its low hazard potential and moderate risk assessment rating, the dam's condition has not been formally assessed. While it does not have a controlled spillway, the dam plays a crucial role in water resource management and environmental protection in the region. With its strategic location and functional design, Henry Dam serves as a vital infrastructure for the local community.
In the event of an emergency, the dam's preparedness and risk management measures are still unclear, as details regarding emergency action plans, inundation maps, and risk assessment summaries are not available. However, the dam's importance for fire protection, livestock, and aquatic life highlights its significance for the surrounding area. As water resource and climate enthusiasts, the exploration of Henry Dam offers valuable insights into the intersection of infrastructure development, environmental stewardship, and community resilience in the face of potential water-related challenges.
Year Completed |
1990 |
Dam Length |
600 |
Dam Height |
27 |
River Or Stream |
TR-FARM CREEK |
Primary Dam Type |
Earth |
Surface Area |
5.3 |
Drainage Area |
0.43 |
Nid Storage |
116 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
East Nishnabotna River At Red Oak
|
270cfs |
West Nishnabotna River At Hancock
|
154cfs |
East Nishnabotna River Near Atlantic
|
143cfs |
West Nishnabotna River At Randolph
|
420cfs |
Missouri River At Omaha
|
17700cfs |
Nodaway River At Clarinda
|
30cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Olde Towne Co Park
|
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Carson City Park
|
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Lyons Park
|
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Cocklin Fish Farm
|
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Legion City Park
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Henry Dam