Allison 2 Cat Dam Reservoir Report
Nearby: Holzberger Dam Johnson Dam
Last Updated: December 11, 2025
Allison 2 Cat Dam, located in Sheridan County, Nebraska, is a vital structure designed by the USDA NRCS for debris control along the TR-ANTELOPE CREEK.
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Summary
Completed in 1983, this earth dam stands at a height of 17 feet with a structural height of 19 feet and a length of 50 feet. Its primary purpose is debris control, serving to protect the surrounding area from potential hazards and ensuring the safety of the community.
With a low hazard potential and satisfactory condition assessment as of October 2017, Allison 2 Cat Dam is regulated by the Nebraska Department of Natural Resources and undergoes regular inspections to ensure its integrity. The dam has a normal storage capacity of 16 acre-feet and a maximum storage of 97 acre-feet, serving a drainage area of 0.7 square miles. Its location within the St. Paul District and proximity to GORDON make it a crucial piece of infrastructure for managing water resources in the region.
As water resource and climate enthusiasts, understanding the significance of structures like Allison 2 Cat Dam is crucial for sustainable water management practices. With its effective debris control capabilities and adherence to state regulations, this dam plays a vital role in protecting the environment and communities downstream. Its history of satisfactory performance and low hazard potential highlight the importance of ongoing maintenance and monitoring to ensure the continued safety and efficiency of water infrastructure in Nebraska.
Year Completed |
1983 |
Dam Length |
50 |
Dam Height |
17 |
River Or Stream |
TR-ANTELOPE CREEK |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
18 |
Drainage Area |
0.7 |
Nid Storage |
97 |
Structural Height |
19 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
19 |
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.
Allison 2 Cat Dam