Anderson Dam 1 Reservoir Report
Nearby: Barkers Spring Allot 3 Dunlap Dam 2
Last Updated: December 6, 2025
Anderson Dam 1, located in Sioux County, Nebraska, stands as a testament to effective water resource management and agricultural irrigation practices.
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Summary
Built in 1950 by the USDA NRCS, this earth dam is primarily used for irrigation purposes, with a storage capacity of 102 acre-feet and a maximum discharge of 480 cubic feet per second. The dam, with a height of 23 feet and a length of 410 feet, is regulated and inspected by the Nebraska Department of Natural Resources, ensuring its structural integrity and safety.
Despite its low hazard potential, Anderson Dam 1 is currently assessed to be in poor condition as of the last inspection conducted in June 2019. The dam's emergency action plan (EAP) status, risk assessment, and inundation maps remain unspecified, raising concerns about its emergency preparedness and risk management measures. With a latency in updates regarding emergency contacts and guidelines compliance, there is a pressing need for proactive measures to address the dam's condition and enhance its safety protocols to mitigate potential risks in the future.
As water resource and climate enthusiasts, it is crucial to recognize the importance of maintaining and improving infrastructure like Anderson Dam 1 to safeguard water resources and ensure the resilience of agricultural irrigation systems in the face of changing environmental conditions. Collaborative efforts between federal and state agencies, as well as local stakeholders, are essential to address the dam's current condition, strengthen its emergency preparedness, and enhance its risk management measures to uphold the safety and sustainability of this vital water resource in Nebraska.
Year Completed |
1950 |
Dam Length |
410 |
Dam Height |
23 |
River Or Stream |
TR-ANTELOPE CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
20 |
Drainage Area |
0.5 |
Nid Storage |
102 |
Structural Height |
23 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
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.
Anderson Dam 1