Reynolds Piney Creek Diversion Dam Reservoir Report
Nearby: Lake Desmet (North Dam) Kaufmann
Last Updated: December 5, 2025
Reynolds Piney Creek Diversion Dam, also known as Texaco Diversion Dam, is a privately owned structure located in Johnson, Wyoming.
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Summary
Completed in 1969, this earth dam serves primarily for irrigation purposes on Piney Creek, with a maximum storage capacity of 114 acre-feet. The dam stands at a height of 22 feet with a hydraulic height of 13 feet and a length of 1850 feet.
The dam features an uncontrolled spillway with a width of 100 feet and three slide (sluice gate) outlet gates. With a significant hazard potential, the dam underwent its last inspection in April 2020 and is subject to regular state regulation, inspection, and enforcement. The risk assessment for the dam is moderate, indicating a level 3 risk, and it is situated within the Omaha District under Congressional District 00, Wyoming, represented by Liz Cheney (R).
Water resource and climate enthusiasts intrigued by the engineering and management of dams will find Reynolds Piney Creek Diversion Dam a fascinating example of private ownership and state regulation in Wyoming. The dam's design, construction, and operational features, coupled with its impact on irrigation and water storage on Piney Creek, provide a compelling case study for understanding the complexities of managing water resources in a changing climate. The dam's role in mitigating flood risks, ensuring water supply for agricultural needs, and navigating regulatory requirements offers valuable insights for sustainable water resource management in the region.
Year Completed |
1969 |
Dam Length |
1850 |
Dam Height |
22 |
River Or Stream |
PINEY CREEK |
Primary Dam Type |
Earth |
Surface Area |
10 |
Hydraulic Height |
13 |
Drainage Area |
12.9 |
Nid Storage |
114 |
Structural Height |
22 |
Outlet Gates |
Slide (sluice gate) - 3 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Piney Creek At Kearny
|
113cfs |
Rock Creek Near Buffalo
|
70cfs |
South Piney Creek At Willow Park
|
0cfs |
Clear Creek Near Buffalo
|
12cfs |
Goose Creek Near Acme
|
123cfs |
Tongue River At Monarch
|
383cfs |
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.
Reynolds Piney Creek Diversion Dam