Oak Creek Reservoir Report
Nearby: Kruger Creek Kilpatrick
Last Updated: December 5, 2025
Oak Creek, located in Crook, Wyoming, is a privately owned irrigation dam completed in 1976 by designer Donald J.
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Summary
Mathesen. This earth dam stands at a height of 41 feet and serves multiple purposes including fire protection, stock, small fish ponds, and irrigation. With a maximum storage capacity of 2500 acre-feet and a normal storage of 915 acre-feet, Oak Creek covers a surface area of 105 acres and drains an area of 45 square miles.
Despite its significant hazard potential and poor condition assessment, Oak Creek has a moderate risk rating and is regulated by the Wyoming State Engineer's Office. The dam features an uncontrolled spillway with a width of 90 feet and is equipped with slide (sluice gate) outlet gates. While last inspected in April 2020 with a 5-year inspection frequency, Oak Creek's risk management measures and emergency action plan status are currently undocumented. Overall, Oak Creek presents an intriguing case study for water resource and climate enthusiasts interested in dam infrastructure and risk assessment in the western United States.
Year Completed |
1976 |
Dam Length |
1600 |
Dam Height |
41 |
River Or Stream |
ALUM CREEK OR OAK CKEEK |
Primary Dam Type |
Earth |
Surface Area |
105 |
Hydraulic Height |
34 |
Drainage Area |
45 |
Nid Storage |
2500 |
Structural Height |
41 |
Outlet Gates |
Slide (sluice gate) - 0 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
41 |
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.
Oak Creek