Parkman Disposal Reservoir Report
Nearby: Turkey Restoration Pond B
Last Updated: December 8, 2025
Parkman Disposal is a private earth dam located on Parkman Draw in Johnson, Wyoming.
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Summary
Built in 1985 by designer Franklin R. Muth, this structure serves primarily for debris control. Standing at a height of 60 feet with a hydraulic height of 57 feet, the dam spans a length of 940 feet and has a storage capacity of 203 acre-feet. Despite its low hazard potential and fair condition assessment, the risk assessment for Parkman Disposal is considered high, indicating the need for ongoing monitoring and management measures.
This dam, constructed for the purpose of debris control, plays a crucial role in managing the flow of Parkman Draw. With no spillway and other controlled outlet gates, Parkman Disposal has been regulated and inspected by the State of Wyoming, demonstrating a commitment to ensuring its safety and functionality. The surrounding area benefits from the dam's presence, as it helps mitigate the risk of flooding and potential environmental impacts. As a key piece of infrastructure in the region, Parkman Disposal serves as a testament to the importance of water resource management in maintaining a sustainable and resilient environment.
Despite its relatively low hazard potential, Parkman Disposal poses a high risk due to its location and the potential consequences of failure. With a history of regular inspections and maintenance, the dam remains in fair condition as of the last assessment in May 2021. Continued monitoring and adherence to safety guidelines are essential to mitigate the identified risks and ensure the long-term integrity of this critical water resource infrastructure in Wyoming.
Year Completed |
1985 |
Dam Length |
940 |
Dam Height |
60 |
River Or Stream |
PARKMAN DRAW |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
57 |
Nid Storage |
203 |
Structural Height |
60 |
Outlet Gates |
Other Controlled - 2 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
60 |
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.
Parkman Disposal