League Dam Reservoir Report
Last Updated: December 25, 2025
League Dam, located in Douglas, Nebraska, is a privately owned structure designed for flood risk reduction on the Elkhorn River.
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Summary
Completed in 1960, this earth dam stands at a height of 29 feet and spans 260 feet in length, with a storage capacity of 17.6 acre-feet. Despite its significant hazard potential, the dam's condition assessment is currently rated as poor, highlighting the need for ongoing maintenance and monitoring to ensure its effectiveness in mitigating flood risks.
Managed by the Nebraska Department of Natural Resources, League Dam is subject to state regulation and inspection, with enforcement measures in place to maintain its structural integrity and safety. The dam's primary purpose is flood risk reduction, aligning with its design as an earth dam with stone core types and soil foundations. Although the dam has not undergone significant modifications in recent years, its last inspection in August 2019 revealed the need for improvement in its overall condition. Water resource and climate enthusiasts can appreciate the vital role League Dam plays in protecting the surrounding area from potential flooding events, while also recognizing the importance of regular maintenance and risk assessment to ensure its continued functionality.
With a limited surface area of 0.01 square miles and a drainage area of 0.2 square miles, League Dam has a maximum discharge capacity of 138 cubic feet per second, highlighting its crucial role in managing water flow during peak flood periods. The dam's location within the Kansas City District of the US Army Corps of Engineers underscores its strategic importance in the region's flood risk management strategy. As climate change continues to impact precipitation patterns and water availability, the maintenance and operation of structures like League Dam will be essential in safeguarding communities and ecosystems from the increasing threat of flooding.
Year Completed |
1960 |
Dam Length |
260 |
Dam Height |
29 |
River Or Stream |
TR-ELKHORN RIVER |
Primary Dam Type |
Earth |
Surface Area |
0.01 |
Hydraulic Height |
29 |
Drainage Area |
0.2 |
Nid Storage |
17.6 |
Structural Height |
29 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Elkhorn River At Waterloo
|
1660cfs |
Platte River Nr Leshara
|
5270cfs |
Big Papillion Cr
|
38cfs |
Maple Creek Near Nickerson
|
66cfs |
Missouri River At Omaha
|
16700cfs |
Wahoo Creek At Ithaca
|
53cfs |
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.
League Dam
Elkhorn Crossing Recreation