Sunny Dene Dairy Waste Pond Reservoir Report
Last Updated: December 14, 2025
Sunny Dene Dairy Waste Pond, located in Mabton, Washington, is a privately owned structure regulated by the Washington Dept of Ecology.
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Summary
This Earth-type dam, completed in 2004, stands at a hydraulic height of 22 feet and has a storage capacity of 30 acre-feet. The primary purpose of this dam is categorized as "Other," and it serves as a crucial component in managing water resources in the area.
With a drainage area of 35 acres and a maximum discharge capacity of 82.2 cubic feet per second, Sunny Dene Dairy Waste Pond plays a significant role in controlling water flow and preventing potential hazards. Despite being classified as having a "Significant" hazard potential, the dam is currently in fair condition as of the last assessment in March 2018. Regular inspections, conducted every five years, ensure that the structure meets safety standards and is prepared for any emergencies.
As water resource and climate enthusiasts, it is essential to recognize the importance of structures like Sunny Dene Dairy Waste Pond in ensuring the efficient management of water resources. By staying informed about the condition and function of such dams, we can contribute to the preservation of our natural environment and the protection of our communities from potential risks associated with water management.
Year Completed |
2004 |
River Or Stream |
Mabton West Lateral |
Primary Dam Type |
Earth |
Hydraulic Height |
22 |
Drainage Area |
35 |
Nid Storage |
30 |
Structural Height |
22 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
22 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yakima River At Mabton
|
28900cfs |
Granger Drain At Granger
|
13cfs |
Yakima River At Kiona
|
23800cfs |
Yakima River Above Ahtanum Creek At Union Gap
|
14200cfs |
Columbia River Below Priest Rapids Dam
|
124000cfs |
Ahtanum Creek At Union Gap
|
197cfs |
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.
Sunny Dene Dairy Waste Pond