Sidney East Dam Reservoir Report
Nearby: Sidney West Dam Blanke Dam
Last Updated: December 5, 2025
Sidney East Dam is a locally owned flood risk reduction structure located in Cheyenne, Nebraska.
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Summary
Constructed in 1958 by designer E Y GRUPE, this earth dam stands at 30 feet tall and stretches over 778 feet in length. It serves the primary purpose of flood risk reduction and is regulated by the Nebraska Department of Natural Resources, with state permitting, inspection, and enforcement in place to ensure its safety and functionality.
With a high hazard potential and satisfactory condition assessment as of August 2020, Sidney East Dam holds a storage capacity of 126 acre-feet and can discharge a maximum of 486 cubic feet per second. Despite its critical role in managing water flow along TR-LODGEPOLE CREEK, the dam's emergency action plan (EAP) status and adherence to guidelines are currently unspecified. The structure's location within the Omaha District and oversight by local government authorities underscore its importance in mitigating flood risks within the region.
Water resource and climate enthusiasts interested in the Sidney East Dam can appreciate its historical significance and ongoing contribution to flood risk management in Cheyenne, Nebraska. As a vital piece of infrastructure designed to safeguard against potential inundation, the dam's satisfactory condition and regulated status by the NE DNR highlight the commitment to maintaining its integrity. With a focus on safety and emergency preparedness, ongoing assessments and risk management measures play a crucial role in ensuring the resilience of this essential water resource structure for the community.
Year Completed |
1958 |
Dam Length |
778 |
Dam Height |
25 |
River Or Stream |
TR-LODGEPOLE CREEK |
Primary Dam Type |
Earth |
Surface Area |
1 |
Hydraulic Height |
24 |
Drainage Area |
0.23 |
Nid Storage |
126 |
Structural Height |
30 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
30 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Platte River Near Crook
|
162cfs |
S. Platte R. At Julesburg
|
-999cfs |
Lodgepole Creek At Bushnell
|
2cfs |
South Platte River At Cooper Bridge
|
13cfs |
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.
Sidney East Dam