Okeson Reservoir Report
Nearby: Suranyi Stock T55nr76w29nwse
Last Updated: December 6, 2025
Okeson is a private water resource located in Campbell, Wyoming, specifically in the city of Arvada.
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Summary
This reservoir, completed in 1945, serves multiple purposes including fire protection, stock watering, and as a small fish pond. It has a dam height of 36 feet and a storage capacity of 110 acre-feet, with a normal storage level of 88 acre-feet. The reservoir is situated on the Oliver Draw river and is regulated and inspected by the Wyoming State Engineer's Office.
Despite its age, Okeson has a low hazard potential but is currently in poor condition according to a 2018 assessment. The dam has an uncontrolled spillway with a width of 100 feet. The risk assessment for this structure is moderate, with a DSAC assigned date yet to be determined. The reservoir is not under the jurisdiction of any federal agency but is subject to state regulations, permitting, inspection, and enforcement. For water resource and climate enthusiasts, Okeson presents an interesting case of a privately owned dam with multiple uses and regulatory oversight in place.
Year Completed |
1945 |
Dam Length |
388 |
Dam Height |
36 |
River Or Stream |
OLIVER DRAW |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
31 |
Nid Storage |
110 |
Structural Height |
36 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Wild Horse Creek Near Arvada
|
0cfs |
Powder River At Arvada
|
156cfs |
Clear Creek Near Arvada
|
256cfs |
Powder River At Moorhead Mt
|
60cfs |
Little Powder River Ab Dry Creek
|
1cfs |
Stonepile Creek At Mouth
|
3cfs |
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.
Okeson