Donaldson Reservoir Report
Nearby: Phil No. 2 Pat
Last Updated: December 5, 2025
Donaldson is a privately owned earth dam located in Clearmont, Wyoming, along the Donaldson Draw.
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Summary
Completed in 1970, this dam serves multiple purposes, including fire protection, stock watering, and creating a small fish pond. With a height of 27 feet and a hydraulic height of 22 feet, Donaldson has a storage capacity of 61 acre-feet and a surface area of 5 acres.
Despite being classified as having a low hazard potential, Donaldson is regularly inspected and maintained to ensure its structural integrity. The dam is equipped with an uncontrolled spillway, 45 feet wide, to manage excess water flow. Its condition was last assessed as fair in June 2021, with a moderate risk level assigned. The dam's emergency action plan status and risk management measures are currently unknown, indicating a potential area for improvement in safety protocols.
Located in Congressional District 00 of Wyoming, Donaldson plays a crucial role in local water resource management and ecosystem support. With its strategic placement along the Donaldson Draw, this dam contributes to fire protection efforts, livestock water supply, and recreational fishing opportunities. Climate enthusiasts and water resource professionals alike can appreciate the importance of Donaldson in maintaining a sustainable and resilient environment in Johnson County, Wyoming.
Year Completed |
1970 |
Dam Length |
235 |
Dam Height |
27 |
River Or Stream |
DONALDSON DRAW |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
22 |
Nid Storage |
61 |
Structural Height |
27 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Piney Creek At Kearny
|
113cfs |
Clear Creek Near Buffalo
|
12cfs |
Powder River At Arvada
|
156cfs |
Rock Creek Near Buffalo
|
70cfs |
Wild Horse Creek Near Arvada
|
0cfs |
South Piney Creek At Willow Park
|
0cfs |
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.
Donaldson