Upton-Osage No. F.S. 9-498-33 Reservoir Report
Nearby: Turner Reservoir East Iron Creek Dam
Last Updated: December 5, 2025
Upton-Osage No.
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Summary
F.S. 9-498-33, also known as Kellog, is a federal Fish and Wildlife Pond located in Weston County, Wyoming. Constructed in 1973, this Earth-type dam stands at a height of 24 feet and has a hydraulic height of 17 feet, serving the primary purpose of providing habitat for aquatic wildlife. Covering a surface area of 7 acres and with a drainage area of 0.6 square miles, this dam on the Moulton Draw river has a maximum discharge capacity of 505 cubic feet per second.
Despite its low hazard potential, Upton-Osage No. F.S. 9-498-33 is subject to regular state regulation, inspection, and enforcement to ensure its structural integrity and safety. With an uncontrolled spillway and one outlet gate, the dam's condition is currently assessed as fair, with a moderate risk level assigned. Although the dam has not been modified in recent years, it is maintained in a satisfactory state to mitigate potential risks and safeguard against emergencies. For water resource and climate enthusiasts, this dam presents an opportunity to observe the intersection of environmental conservation and infrastructure management in a unique ecosystem setting.
Year Completed |
1973 |
Dam Length |
327 |
Dam Height |
24 |
River Or Stream |
MOULTON DRAW |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
17 |
Drainage Area |
0.6 |
Nid Storage |
75 |
Structural Height |
24 |
Outlet Gates |
Uncontrolled - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
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.
Upton-Osage No. F.S. 9-498-33