Troublesome Creek Watershed Site 78-3 Reservoir Report
Last Updated: December 14, 2025
Troublesome Creek Watershed Site 78-3, located in Cass County, Iowa, is a vital flood risk reduction structure designed by USDA NRCS in 1999.
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Summary
This earth dam stands at a height of 25 feet and spans 457 feet in length, with a storage capacity of 145 acre-feet. The dam serves to stabilize grades along the Tr- East Nishnabotna River, offering protection to the surrounding area from potential flooding events.
Managed by the local government and regulated by the Iowa DNR, Troublesome Creek Watershed Site 78-3 plays a crucial role in safeguarding the community of Atlantic. With a low hazard potential and a moderate risk assessment rating, this structure remains an essential component of the region's water resource management strategy. Despite its current condition being unrated, the dam continues to fulfill its primary purpose of flood risk reduction, highlighting its significance in maintaining the resilience of the watershed.
As a part of the Rock Island District, Troublesome Creek Watershed Site 78-3 represents a collaborative effort between federal and state agencies to address water resource challenges in the area. With a focus on flood risk reduction and grade stabilization, this structure exemplifies the commitment to sustainable water management practices in Iowa. For water resource and climate enthusiasts, this site serves as a noteworthy example of proactive measures taken to mitigate the impacts of extreme weather events on the local community.
Year Completed |
1999 |
Dam Length |
457 |
Dam Height |
25 |
River Or Stream |
Tr- East Nishnabotna River |
Primary Dam Type |
Earth |
Surface Area |
8.6 |
Drainage Area |
0.47 |
Nid Storage |
145 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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.
Troublesome Creek Watershed Site 78-3