Roche Pomona Dam, located in Yakima, Washington, is a privately owned structure designed by Huibregtse, Louman Associates. Completed in 1995, this earth dam stands at a hydraulic height of 23 feet and a structural height of 21 feet. The primary purpose of the dam is irrigation, with a storage capacity of 48 acre-feet and a normal storage level of 30.3 acre-feet. With a surface area of 4.8 acres and a drainage area of 0.15 square miles, the dam plays a crucial role in managing water resources in the region.

Managed by the Washington Department of Ecology, Roche Pomona Dam has a high hazard potential but is currently in satisfactory condition as of the last assessment in November 2019. The dam undergoes inspections every five years to ensure its safety and reliability. While the spillway type and width are not specified, the dam serves as a vital infrastructure for regulating water flow in the Yakima River tributary. With its strategic location and design, Roche Pomona Dam exemplifies the importance of sustainable water resource management in the face of changing climate patterns.

The surrounding community of Sealh and the broader Yakima region benefit from the water supply and irrigation services facilitated by Roche Pomona Dam. As a key component of the local water infrastructure, the dam plays a crucial role in supporting agricultural activities and maintaining the ecological balance of the area. With its solid foundation and satisfactory condition, Roche Pomona Dam stands as a testament to the collaborative efforts of private owners, regulatory agencies, and designers in ensuring the resilience of water resources in Washington State.