Kimberly Reservoir Report
Nearby: Madonna Mary No. 2
Last Updated: December 5, 2025
Kimberly, located in Johnson, Wyoming, is a privately owned dam with a primary purpose of fire protection, stock, or small fish pond, as well as flood risk reduction.
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Summary
Completed in 1973, this earth dam stands at 29 feet in height and spans 150 feet in length, with a storage capacity of 43 acre-feet. Situated on Cow Creek, this structure serves the community of Arvada and is regulated by the Wyoming State Engineer's Office, with state permitting, inspection, and enforcement in place.
Although Kimberly has a low hazard potential and is currently assessed to be in fair condition, it presents a moderate risk level due to its location and design features. The dam features an uncontrolled spillway and one outlet gate, with a maximum discharge capacity of 73 cubic feet per second. Despite its relatively small surface area of 3 acres, this dam plays a crucial role in providing essential services for the local area, ensuring fire protection and water supply for livestock and small fish ponds. With regular inspections and a history of compliance with state regulations, Kimberly remains a vital asset for water resource management in the region.
Year Completed |
1973 |
Dam Length |
150 |
Dam Height |
29 |
River Or Stream |
COW CREEK |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
24 |
Nid Storage |
43 |
Structural Height |
29 |
Outlet Gates |
Uncontrolled - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Powder River At Arvada
|
156cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Clear Creek Near Buffalo
|
12cfs |
Piney Creek At Kearny
|
113cfs |
Rock Creek Near Buffalo
|
70cfs |
Clear Creek Near Arvada
|
256cfs |
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.
Kimberly