Ahlswel Dam Reservoir Report
Nearby: Gross Dam 2 Gross Dam 1
Last Updated: December 6, 2025
Ahlswel Dam, located in Furnas, Nebraska, is a privately owned structure that plays a crucial role in flood risk reduction along TR-Deer Creek.
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Summary
Completed in 1960, this earth dam stands at a height of 18.2 meters and has a storage capacity of 90.8 million cubic meters, with a normal storage level of 50.2 million cubic meters. The dam covers a surface area of 8.3 hectares and serves a drainage area of 1.55 square kilometers.
Managed by the Nebraska Department of Natural Resources (DNR), Ahlswel Dam has been deemed to have a low hazard potential and is currently in fair condition, based on a 2014 assessment. While there have been no recent modifications to the dam, regular inspections are conducted every 10 years to ensure its structural integrity and effectiveness in flood control. The dam's primary purpose is flood risk reduction, although it also serves other functions in water management.
With its strategic location and efficient design, Ahlswel Dam stands as a vital infrastructure for mitigating flood risks and protecting the surrounding areas in Furnas County, Nebraska. Its role in water resource management and climate resilience highlights the importance of such structures in safeguarding communities from the impacts of extreme weather events.
Year Completed |
1960 |
Dam Length |
310 |
Dam Height |
18.2 |
River Or Stream |
TR-Deer Creek |
Primary Dam Type |
Earth |
Surface Area |
8.3 |
Hydraulic Height |
18.2 |
Drainage Area |
1.55 |
Nid Storage |
90.8 |
Structural Height |
18.2 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
18 |
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.
Ahlswel Dam