East Fork Grand River Watershed Site D-42 Reservoir Report
Last Updated: December 12, 2025
Located in the picturesque East Fork Grand River Watershed in Ringgold County, Iowa, Site D-42 is a flood risk reduction structure designed by the USDA NRCS and completed in 2008.
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Summary
This earth dam stands at 26 feet high, with a length of 530 feet and a storage capacity of 150 acre-feet, serving the primary purpose of flood risk reduction for the local community. With a low hazard potential and a moderate risk assessment rating, this structure plays a crucial role in protecting the surrounding area from potential flooding events.
Managed by the Iowa DNR, this site is state-regulated and permitted, with regular inspections and enforcement to ensure its structural integrity and functionality. Despite not being rated for condition assessment, this dam is considered a vital component in the overall risk management strategy for the watershed. The East Fork Grand River Watershed Site D-42 is an essential part of the region's water resource infrastructure, providing valuable flood protection and contributing to the overall resilience of the local environment.
With its strategic location and design, Site D-42 not only helps to mitigate flood risks but also enhances the overall water management capabilities in the area. Supported by local government ownership and state regulatory oversight, this structure stands as a testament to effective collaboration in water resource management. As climate change continues to impact water resources, structures like Site D-42 will play a crucial role in adapting to and mitigating the effects of a changing climate on the region's waterways and communities.
Year Completed |
2008 |
Dam Length |
530 |
Dam Height |
26 |
River Or Stream |
Trib to Lotts Creek |
Primary Dam Type |
Earth |
Surface Area |
9.7 |
Drainage Area |
0.48 |
Nid Storage |
150 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
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-42