Corbett Diversion Dam Reservoir Report
Last Updated: December 5, 2025
Corbett Diversion Dam, located in Powell, Wyoming, is a federally-owned structure on the Shoshone River designed primarily for irrigation purposes.
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Summary
This concrete dam stands at a height of 12 feet and spans a length of 400 feet, with a storage capacity of 500 acre-feet. The dam is regulated by the State of Wyoming and has a low hazard potential with a fair condition assessment as of the last inspection in August 2019.
The dam features an uncontrolled spillway with a width of 100 feet and is situated within Park County. Managed by the Omaha District of the US Army Corps of Engineers, Corbett Diversion Dam plays a crucial role in diverting water for agricultural use in the region. While the risk assessment for the dam is moderate, with a risk level of 3, the structure has not undergone significant modifications since its completion.
Despite its low hazard potential, Corbett Diversion Dam serves as a vital infrastructure for water resource management in the area, ensuring a stable water supply for irrigation purposes. With its strategic location on the Shoshone River and its adherence to state regulations and inspections, the dam continues to play a key role in supporting agricultural activities in the region.
Dam Length |
400 |
Dam Height |
12 |
River Or Stream |
SHOSHONE |
Primary Dam Type |
Concrete |
Surface Area |
3.46 |
Hydraulic Height |
12 |
Nid Storage |
500 |
Structural Height |
12 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
12 |
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.
Corbett Diversion Dam