SNOFLO
 



PROSSER DIVERSION

RESERVOIR LEVELS
Rock Dam Yakima River
April 24, 2025


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Prosser Diversion, located in Benton County, Washington, along the Yakima River, is a Federal-owned irrigation structure managed by the Bureau of Reclamation. Constructed in 1916, this concrete arch dam stands at 9 feet tall and spans 661 feet in length, with a storage capacity of 350 acre-feet. Primarily serving irrigation purposes, Prosser Diversion plays a crucial role in supporting agricultural activities in the region.

With a low hazard potential and a moderate risk assessment rating of 3, Prosser Diversion is a key component of water resource management in the area. Although the condition assessment is currently listed as "Not Available," the Bureau of Reclamation conducts inspections every 6 years to ensure the structure's safety and functionality. As an uncontrolled spillway dam, it is essential for the proper operation and maintenance of Prosser Diversion to mitigate potential risks and address any necessary improvements for long-term sustainability.

Climate enthusiasts and water resource stakeholders interested in the management and operation of irrigation structures will find Prosser Diversion a fascinating case study. With its historical significance and ongoing role in supporting agricultural activities along the Yakima River, this Federal-owned dam highlights the importance of sustainable water resource management practices in the face of changing climatic conditions and increasing demands for water resources.

Year_Completed 1916
Dam_Height 9
River_Or_Stream YAKIMA RIVER
Dam_Length 661
Primary_Dam_Type Concrete
Hydraulic_Height 7
Nid_Storage 350
Structural_Height 9
Hazard_Potential Low
Foundations Rock
Nid_Height 9
       

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