Upper Little Nemaha 63 Reservoir Report
Nearby: Vogt Dam Upper Little Nemaha 59
Last Updated: December 5, 2025
Upper Little Nemaha 63, located in Unadilla, Nebraska, is a vital flood risk reduction structure owned by the local government and regulated by the Nebraska Department of Natural Resources.
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Summary
Completed in 2001, this earth dam stands at an impressive height of 42 feet and spans 1690 feet in length, with a storage capacity of 263 acre-feet. The dam plays a crucial role in protecting the surrounding area from potential flooding, with a low hazard potential and a satisfactory condition assessment.
Situated on the TR-Hooper Creek, Upper Little Nemaha 63 serves as a key component in managing water resources in Otoe County, Nebraska. It covers a drainage area of 6.2 square miles and has a maximum discharge of 3624 cubic feet per second. Despite its age, the dam has been well maintained, with regular inspections conducted every five years to ensure its structural integrity and operational effectiveness. In the event of an emergency, the dam's emergency action plan (EAP) is designed to meet established guidelines and provide necessary measures to mitigate risks.
With its strategic location and efficient design, Upper Little Nemaha 63 stands as a testament to the importance of proactive flood risk reduction measures in safeguarding communities and ecosystems. Managed by local authorities and meeting regulatory standards, this earth dam exemplifies the successful collaboration between government agencies and the community to protect water resources and mitigate the impacts of climate change in the region.
Year Completed |
2001 |
Dam Length |
1690 |
Dam Height |
42 |
River Or Stream |
TR-HOOPER CREEK |
Primary Dam Type |
Earth |
Surface Area |
44 |
Hydraulic Height |
41 |
Drainage Area |
6.2 |
Nid Storage |
2020 |
Structural Height |
48 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
48 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Stevens Creek Nr. Lincoln
|
3cfs |
Salt Creek At Greenwood
|
125cfs |
Salt Creek At 70th St. At Lincoln
|
92cfs |
Salt Creek At Roca
|
5cfs |
Salt Creek At Lincoln
|
77cfs |
Salt Creek At Pioneers Blvd At Lincoln
|
11cfs |
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.
Upper Little Nemaha 63