Conley Dam 2 Reservoir Report
Last Updated: December 14, 2025
Conley Dam 2, located in Quimby, Iowa, is a private dam managed by the NRCS and regulated by the Iowa DNR.
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Summary
Completed in 2002, this earth dam stands at 36 feet tall and spans 340 feet in length, with a storage capacity of 94 acre-feet. Designed for fire protection, stock, and small fish pond purposes, the dam is situated on TR-Coonley Creek and serves as a vital water resource in Cherokee County.
With a low hazard potential and a moderate risk assessment rating, Conley Dam 2 plays a crucial role in water management and conservation efforts in the region. Although the dam is not currently rated for condition assessment, its state-regulated status ensures regular inspections and enforcement of safety measures. The dam's location in the Rock Island District highlights its significance in maintaining water quality and availability for local communities.
Enthusiasts interested in water resource management and climate resilience will find Conley Dam 2 to be a fascinating example of private dam infrastructure in Iowa. With its strategic design and purposeful construction, the dam serves as a key asset for fire protection and livestock water supply in the area. As climate change continues to impact water availability, Conley Dam 2 stands as a testament to the importance of sustainable water management practices in ensuring a reliable and secure water supply for future generations.
Year Completed |
2002 |
Dam Length |
340 |
Dam Height |
36 |
River Or Stream |
TR- COONLEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.5 |
Drainage Area |
0.71 |
Nid Storage |
94 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Little Sioux River At Linn Grove
|
257cfs |
Little Sioux River At Correctionville
|
327cfs |
Floyd River At Alton
|
36cfs |
Ocheyedan River Near Spencer
|
59cfs |
North Raccoon River Near Sac City
|
312cfs |
Maple River At Mapleton
|
323cfs |
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.
Conley Dam 2