East Fork Big Cr Watershed Site Z-6 Reservoir Report
Last Updated: December 11, 2025
East Fork Big Cr Watershed Site Z-6 in Decatur, Iowa is a key site managed by the local government for flood risk reduction.
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Summary
The dam, completed in 1990, is an earth structure standing at 20 feet tall and stretching 500 feet in length, with a storage capacity of 59 acre-feet. Situated on TR-Zadie Creek, this site plays a crucial role in protecting the surrounding area from potential flooding events, serving as a vital infrastructure for water resource management.
With a low hazard potential and a moderate risk assessment rating, East Fork Big Cr Watershed Site Z-6 is an essential component of the region's water resource and climate resilience strategy. The dam, designed by SCS, is regulated by the Iowa Department of Natural Resources and undergoes regular inspections and enforcement to ensure its functionality and safety. The site's purpose extends beyond flood risk reduction, also offering fire protection and serving as a source for small fish pond stocking.
Located in the Rock Island District, East Fork Big Cr Watershed Site Z-6 not only contributes to water management efforts but also plays a role in enhancing the overall environmental quality of the area. With its strategic positioning and functional design, this site serves as a testament to the importance of sustainable water resource infrastructure in ensuring community safety and resilience in the face of changing climate conditions.
Year Completed |
1990 |
Dam Length |
500 |
Dam Height |
20 |
River Or Stream |
TR- ZADIE CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.5 |
Drainage Area |
0.18 |
Nid Storage |
59 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
East Fork Big Cr Watershed Site Z-6