East Fork Grand River Watershed Site D-25 Reservoir Report
Last Updated: December 13, 2025
Located in the East Fork Grand River Watershed in Ringgold County, Iowa, Site D-25 is a flood risk reduction structure managed by the local government.
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Summary
Designed by the USDA NRCS and completed in 2006, this earth dam stands at 22 feet high and spans 565 feet in length. With a storage capacity of 93 acre-feet, the dam serves to protect the surrounding area from the potential impacts of flooding along Tr-Lotts Creek.
Although classified as having a low hazard potential, the dam at Site D-25 plays a crucial role in mitigating flood risks for the community. With a moderate risk assessment rating of 3, ongoing inspections and regulatory oversight by the Iowa DNR ensure that the structure remains in compliance with state regulations. Despite its relatively small drainage area of 0.27 square miles, the dam provides essential flood protection for the region, contributing to the overall resilience of the watershed.
As a key component of the local flood risk reduction strategy, Site D-25 underscores the importance of proactive water resource management in the face of changing climate conditions. With its focus on safeguarding the community from potential inundation, this structure serves as a vital asset in the broader efforts to enhance water security and climate resilience in the East Fork Grand River Watershed.
Year Completed |
2006 |
Dam Length |
565 |
Dam Height |
22 |
River Or Stream |
Tr-Lotts Creek |
Primary Dam Type |
Earth |
Surface Area |
6 |
Drainage Area |
0.27 |
Nid Storage |
93 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
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 Grand River Watershed Site D-25