White Reservoir Report
Nearby: Snyder No. 1 Snyder No. 2
Last Updated: December 5, 2025
White is a privately owned Earth dam located in Greybull, Wyoming, along the White Gulch stream.
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Summary
Built in 1914 for irrigation purposes, this dam stands at a height of 20 feet and has a storage capacity of 201 acre-feet. Despite its age, the dam is well-maintained with a fair condition assessment and a low hazard potential.
Managed by the Wyoming state regulatory agency SEO, White Dam is subject to regular inspections, with the last one conducted in April 2017. The dam features a single valve outlet gate and does not have a spillway, emphasizing its low-risk profile. However, the risk assessment indicates a high risk level, prompting the need for ongoing risk management measures to ensure the safety and integrity of the structure.
In the event of an emergency, the status of White Dam's Emergency Action Plan (EAP) preparation and adherence to guidelines is not specified in the data. With Liz Cheney as the Congressional representative for the area, stakeholders and water resource enthusiasts are encouraged to stay informed about any updates or developments regarding White Dam to ensure the continued sustainability of the irrigation infrastructure in Big Horn County, Wyoming.
Year Completed |
1914 |
Dam Length |
60 |
Dam Height |
20 |
River Or Stream |
WHITE GULCH |
Primary Dam Type |
Earth |
Surface Area |
15 |
Hydraulic Height |
15 |
Nid Storage |
201 |
Structural Height |
20 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Bighorn River At Basin
|
996cfs |
Bighorn River At Kane
|
1340cfs |
Shell Creek Near Shell
|
74cfs |
Bighorn R At Worland Wyo
|
4350cfs |
Shoshone River Near Lovell
|
460cfs |
Greybull River At Meeteetse
|
338cfs |
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.
White