East Fork Grand River Watershed Site D-59 Reservoir Report
Last Updated: December 12, 2025
Located in the picturesque East Fork Grand River Watershed in Ringgold County, Iowa, Site D-59 is a Grade Stabilization dam designed by the USDA NRCS to regulate the flow of Tr- South Creek.
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Summary
Completed in 2002, this Earth-type dam stands at a height of 24 feet and spans 637 feet, with a storage capacity of 106 acre-feet. The dam serves a primary purpose of Grade Stabilization and is regulated by the Iowa DNR, ensuring its structural integrity and safety.
With a low hazard potential and a moderate risk assessment rating, East Fork Grand River Watershed Site D-59 plays a crucial role in managing water resources in the region. Its uncontrolled spillway system and soil foundation contribute to its efficient operation, while its location in the heart of the watershed provides vital flood control and water management benefits. While not currently rated for condition assessment, the dam's presence underscores the importance of sustainable water resource management practices in safeguarding the local environment and communities from potential risks associated with climate change and extreme weather events.
As a key component of the local government's water infrastructure, East Fork Grand River Watershed Site D-59 exemplifies the collaborative efforts between agencies like the USDA NRCS and the Iowa DNR to ensure the resilience and sustainability of water resources in the region. With its strategic location and purposeful design, this dam stands as a testament to the importance of proactive water management practices in mitigating the effects of climate change and protecting the natural environment for future generations of water resource and climate enthusiasts.
Year Completed |
2002 |
Dam Length |
637 |
Dam Height |
24 |
River Or Stream |
Tr- South Creek |
Primary Dam Type |
Earth |
Surface Area |
6.2 |
Drainage Area |
0.31 |
Nid Storage |
106 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
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-59
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