East Fork Grand River Watershed Site D-37 Reservoir Report
Last Updated: December 14, 2025
Located in Ringgold County, Iowa, East Fork Grand River Watershed Site D-37 is a local government-owned earth dam designed by the USDA NRCS for flood risk reduction.
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Summary
Completed in 2008, this dam stands at a height of 26 feet and spans 450 feet in length, with a storage capacity of 56 acre-feet and a surface area of 3.3 acres. Situated in the tributary to Lotts Creek, this dam is regulated by the Iowa DNR and is equipped with an uncontrolled spillway.
With a low hazard potential and a moderate risk assessment rating, East Fork Grand River Watershed Site D-37 plays a crucial role in managing flood risk within the region. Despite its condition being marked as "not rated," this dam continues to serve its primary purpose effectively. As a part of the flood risk reduction infrastructure, this site demonstrates the collaborative efforts between local government agencies and the USDA NRCS in safeguarding communities and the environment against potential water-related disasters. Through regular inspections and enforcement by Iowa DNR, this dam ensures the safety and resilience of the surrounding area in the face of changing climate patterns.
Year Completed |
2008 |
Dam Length |
450 |
Dam Height |
26 |
River Or Stream |
Trib to Lotts Creek |
Primary Dam Type |
Earth |
Surface Area |
3.3 |
Drainage Area |
0.16 |
Nid Storage |
56 |
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-37