Pk 9-17 Reservoir Report
Nearby: Enl. Fresno Margaret No.2
Last Updated: December 18, 2025
Pk 9-17 is a private irrigation dam located in Johnson, Wyoming, along the unnamed tributary of Crazy Woman Creek.
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Summary
Built in 2007, this earth dam stands at 35 feet tall and has a storage capacity of 42 acre-feet. The dam serves multiple purposes including fire protection, stock watering, small fish pond, fish and wildlife habitat, and irrigation, making it a crucial water resource for the area.
With a fair condition assessment and low hazard potential, Pk 9-17 poses a moderate risk, according to the latest data from 2018. The dam is equipped with an uncontrolled spillway and a single valve outlet gate for water management. Despite its modest size with a surface area of 3.1 acres and drainage area of 0.15 square miles, Pk 9-17 plays a significant role in water storage and distribution for the surrounding area.
Managed by the private owner and regulated by the Wyoming State Engineer's Office and Department of Environmental Quality, Pk 9-17 undergoes regular inspections and enforcement to ensure its safety and functionality. The dam's strategic location on Tipperary Road highlights its importance in sustaining agricultural activities and enhancing the local ecosystem. For water resource and climate enthusiasts, Pk 9-17 represents a vital infrastructure contributing to water availability and ecosystem health in Wyoming.
Year Completed |
2007 |
Dam Length |
360 |
Dam Height |
28 |
River Or Stream |
UNNAMED TRIB. CRAZY WOMAN CREE |
Primary Dam Type |
Earth |
Surface Area |
3.1 |
Hydraulic Height |
23 |
Drainage Area |
0.15 |
Nid Storage |
42 |
Structural Height |
35 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Powder River At Arvada
|
243cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Clear Creek Near Arvada
|
256cfs |
Clear Creek Near Buffalo
|
17cfs |
Piney Creek At Kearny
|
113cfs |
Rock Creek Near Buffalo
|
70cfs |
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.
Pk 9-17