Kajan Diversion Reservoir Report
Nearby: Cockran Grazing #4 Wyotana Ranch #4
Last Updated: December 5, 2025
The Kajan Diversion, located in Camp Crook, South Dakota, is a privately owned irrigation structure completed in 1965 on Thompson Creek.
°F
°F
mph
Wind
%
Humidity
Summary
This earth dam stands at 19 feet high with a hydraulic height of 14 feet, serving primarily for irrigation purposes. With a storage capacity of 694 acre-feet, the dam spans 3200 feet in length and covers a surface area of 102 acres. Despite being regulated by the State of Wyoming, the dam is considered to have a low hazard potential and is currently in fair condition as of the last inspection in June 2021.
The Kajan Diversion features an uncontrolled spillway with a width of 600 feet and two slide gates for outlet control. Its risk assessment deems the structure to have a moderate risk level, with a risk management plan yet to be defined. The dam is inspected every five years, with the last assessment conducted in June 2021. Overall, the Kajan Diversion serves as a vital irrigation resource in Crook County, Wyoming, showcasing the importance of water infrastructure in sustaining agricultural practices in the region.
Year Completed |
1965 |
Dam Length |
3200 |
Dam Height |
19 |
River Or Stream |
THOMPSON CREEK |
Primary Dam Type |
Earth |
Surface Area |
102 |
Hydraulic Height |
14 |
Nid Storage |
694 |
Structural Height |
19 |
Outlet Gates |
Slide (sluice gate) - 2 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
19 |
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.
Kajan Diversion