Four D Wetland Dam Reservoir Report
Nearby: Hawk Investments Dam Heller Dam
Last Updated: December 13, 2025
The Four D Wetland Dam, located in Middle Amana, Iowa, was completed in 2006 with the primary purpose of serving as a Fish and Wildlife Pond.
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Summary
This private-owned dam stands at a height of 10 feet and stretches out over a length of 7800 feet, offering a storage capacity of 555 acre-feet. With a low hazard potential and a moderate risk assessment rating, the dam is state-regulated and inspected regularly by the Iowa DNR to ensure its structural integrity and safety.
Situated along the TR-Iowa River, this Earth-type dam utilizes soil foundations and features an uncontrolled spillway with a width of 3 feet. Despite not having any associated structures or outlet gates, the Four D Wetland Dam serves an important role in providing habitat for fish and wildlife in the area. The risk management measures for this dam are currently unspecified, but its condition is noted as not rated, indicating potential room for improvement in assessing and addressing any deficiencies.
For water resource and climate enthusiasts, the Four D Wetland Dam offers an intriguing case study in dam management and habitat conservation. As a vital component of the local ecosystem, this dam plays a key role in supporting biodiversity and providing recreational opportunities for the community. With its strategic location and moderate risk profile, the dam serves as a valuable asset for both environmental conservation and flood control efforts in the region.
Year Completed |
2006 |
Dam Length |
7800 |
Dam Height |
10 |
River Or Stream |
TR-IOWA RIVER |
Primary Dam Type |
Earth |
Surface Area |
41 |
Drainage Area |
0.82 |
Nid Storage |
555 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Iowa River At Marengo
|
818cfs |
Big Bear Creek At Ladora
|
51cfs |
Iowa River Near Belle Plaine
|
966cfs |
Clear Creek Near Oxford
|
11cfs |
Salt Creek Near Elberon
|
42cfs |
Walnut Creek Near Hartwick
|
13cfs |
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.
Four D Wetland Dam