Glendo Dike No. 3 Reservoir Report
Nearby: Glendo Dike No. 2 Glendo Dike No. 1
Last Updated: December 5, 2025
Glendo Dike No.
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Summary
3, located in Wyoming along the North Platte River, is a federal-owned structure designed by I.J. Matthews for flood risk reduction. Completed in 1958, this earth dam stands at a height of 75 feet, with a total structural height of 88 feet and a hydraulic height of 61 feet. Its primary purpose is flood risk reduction, though it also serves hydroelectric and irrigation purposes.
With a storage capacity of 1,118,653 acre-feet and a surface area of 23,320 acres, Glendo Dike No. 3 plays a crucial role in managing water resources in the region. The dam has a high hazard potential and is regulated by the Bureau of Reclamation, which is also responsible for inspections and operations. Despite a moderate risk assessment rating, the condition assessment of the dam is currently listed as not available.
In 2016, the dam underwent modifications to its foundation, demonstrating a commitment to ensuring its structural integrity. While the dam does not have outlet gates, its uncontrolled spillway is designed to handle a maximum discharge of 21,535 cubic feet per second. Glendo Dike No. 3 stands as a key infrastructure for water resource management and climate resilience in Wyoming, showcasing the importance of effective dam regulation and maintenance in safeguarding communities from flood risks.
Years Modified |
2016 - Foundation |
Year Completed |
1958 |
Dam Length |
850 |
Dam Height |
75 |
River Or Stream |
NORTH PLATTE RIVER OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
23320 |
Hydraulic Height |
61 |
Nid Storage |
1118653 |
Structural Height |
88 |
Outlet Gates |
None |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
88 |
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.
Glendo Dike No. 3