Evans Konnowac Dam, located in Yakima, Washington, is a privately owned offstream dam primarily used for irrigation purposes. Completed in 1990, this earth dam stands at a structural height of 33 feet and has a storage capacity of 28 acre-feet, with a normal storage level of 21 acre-feet. The dam covers a surface area of 2.3 acres and serves a drainage area of 0.05 square miles.

Despite its important role in supporting agricultural activities in the region, the dam has been assessed to have a high hazard potential and poor condition. The last inspection in April 2015 revealed the need for maintenance and improvements to ensure the safety and integrity of the structure. The dam is regulated by the Washington Department of Ecology, with state permitting, inspection, and enforcement in place.

As an essential water resource in the area, the Evans Konnowac Dam plays a crucial role in providing irrigation water to support farming activities. However, the dam's poor condition and high hazard potential highlight the need for ongoing monitoring and maintenance to mitigate any risks and ensure its continued functionality in the face of changing climate patterns and water resource demands.