Upper Little Nemaha 37 Reservoir Report
Last Updated: December 5, 2025
Upper Little Nemaha 37, located in Unadilla, Nebraska, is a crucial structure owned and regulated by the local government for flood risk reduction along the TR-Silver Creek.
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Summary
Constructed in 1994, this earth dam stands at a height of 30 feet and has a storage capacity of 280 acre-feet, serving its primary purpose effectively. With a satisfactory condition assessment and low hazard potential, the dam has undergone inspections every 5 years, with the last assessment conducted in May 2016.
Managed by the Nebraska Department of Natural Resources, Upper Little Nemaha 37 plays a vital role in protecting the surrounding area from potential flooding events. With a drainage area of 1 square mile and a maximum discharge capacity of 390 cubic feet per second, this structure ensures the safety and security of the local community. Despite its modest surface area of 12 acres, the dam's strategic location and design contribute significantly to its efficient flood risk reduction capabilities.
As part of the Kansas City District, Upper Little Nemaha 37 remains a key component in the region's water resource management infrastructure. With state jurisdiction and regulatory oversight, this dam underscores the importance of sustainable water resource practices and climate resilience. Climate enthusiasts and water resource experts alike can appreciate the significance of this structure in safeguarding against potential flood hazards and ensuring environmental protection for the community.
Year Completed |
1994 |
Dam Length |
628 |
Dam Height |
30 |
River Or Stream |
TR-SILVER CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
29 |
Drainage Area |
1 |
Nid Storage |
280 |
Structural Height |
34 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Salt Creek At Roca
|
5cfs |
Stevens Creek Nr. Lincoln
|
3cfs |
Salt Creek At Pioneers Blvd At Lincoln
|
11cfs |
Salt Creek At 70th St. At Lincoln
|
92cfs |
Salt Creek At Lincoln
|
77cfs |
Salt Creek At Greenwood
|
125cfs |
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 37