Dredge Dam Reservoir Report
Nearby: Peters Dam Sickels Dam
Last Updated: December 13, 2025
Dredge Dam, located in Delphos, Iowa, is a privately owned structure designed by USDA NRCS for grade stabilization along a tributary to Walnut Creek.
°F
°F
mph
Wind
%
Humidity
Summary
Completed in 2013, this earth dam stands at 26 feet high and stretches 489 feet in length, providing storage capacity of 93 acre-feet for water supply and recreation purposes. The dam is regulated by the Iowa DNR and undergoes regular inspections, with a low hazard potential and a condition assessment that is currently not rated.
The dam's primary purpose is grade stabilization, with additional functions including water supply and recreation. It features stone core types and a soil foundation, with a spillway width of 20 feet and a maximum discharge capacity of 150 cubic feet per second. While the dam has not been modified since its completion, it serves as a vital infrastructure for managing water resources in the Ringgold County area. Dredge Dam exemplifies the importance of sustainable water management practices in mitigating the impacts of climate change and ensuring the resilience of local communities.
Year Completed |
2013 |
Dam Length |
489 |
Dam Height |
26 |
River Or Stream |
Trib to Walnut Creek |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
26 |
Drainage Area |
0.4 |
Nid Storage |
93 |
Structural Height |
26 |
Outlet Gates |
None |
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.
Dredge Dam