Sievers Dam Reservoir Report
Last Updated: December 14, 2025
Sievers Dam, located in Louisa County, Iowa, is a privately owned structure designed by the NRCS with state regulation and enforcement by the Iowa DNR.
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Summary
Completed in 2004, this earth dam serves the primary purposes of fire protection, stock, and small fish pond management. With a height of 31 feet and a length of 350 feet, Sievers Dam has a storage capacity of 50 acre-feet, with a normal storage level of 30 acre-feet. The dam is situated on TR- LONG CREEK and is under the jurisdiction of the Rock Island District of the USACE.
The hazard potential of Sievers Dam is rated as low, with a moderate risk assessment score of 3. Although the condition assessment is not rated, the dam has not been modified since its completion. The spillway type is uncontrolled, with a width of 1 foot. The dam has not been inspected recently, and there is no emergency action plan in place. Despite these limitations, Sievers Dam remains a vital resource for water management and conservation in the area, contributing to the overall sustainability of the region's water supply and ecosystem.
As a significant feature in the local landscape, Sievers Dam provides essential services for fire protection and agricultural activities, while also supporting wildlife habitat and recreational opportunities. While the dam's risk assessment suggests a need for monitoring and potential upgrades in the future, its current operations meet the guidelines for safe and efficient water management. As water resource and climate enthusiasts, it is crucial to recognize the importance of structures like Sievers Dam in maintaining the balance between human needs and environmental stewardship in a changing climate.
Year Completed |
2004 |
Dam Length |
350 |
Dam Height |
31 |
River Or Stream |
TR- LONG CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.1 |
Drainage Area |
0.1 |
Nid Storage |
50 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Iowa River Near Lone Tree
|
1830cfs |
Cedar River Near Conesville
|
1720cfs |
Iowa River At Wapello
|
2660cfs |
Big Creek Near Mt. Pleasant
|
0cfs |
English River At Kalona
|
41cfs |
Cedar Creek Near Oakland Mills
|
10cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Louisa County Fairgrounds
|
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Marr Park
|
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Virginia Grove Rec Area
|
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Crooked Creek Christian Camp
|
Sievers Dam