King Reservoir (West Dam) in Idaho is a privately owned water resource managed for irrigation purposes by the USDA NRCS. The dam, completed in 1969, stands at a height of 29.8 feet and has a storage capacity of 300 acre-feet, serving the surrounding area through an unnamed stream and Little McBride Creek. The reservoir covers a surface area of 28 acres and has a drainage area of 1.1 square miles, making it a vital water source for agricultural activities in the region.

Despite being a privately owned structure, King Reservoir is regulated and inspected by the Idaho Department of Water Resources, ensuring its safety and compliance with state regulations. The dam is classified as an earth dam with stone core types and is primarily made of rock and soil foundations. Its condition is assessed as fair, with a significant hazard potential and a high risk rating. The last inspection in June 2018 revealed that the dam meets guidelines and has emergency action plans in place, reflecting a commitment to maintaining safety and preparedness in the face of potential risks.

With its strategic location in Owyhee County, Idaho, King Reservoir plays a crucial role in irrigating agricultural lands and supporting the local economy. The dam's construction by the Natural Resources Conservation Service underscores the importance of sustainable water management practices in the region. As a significant water resource for the community, King Reservoir exemplifies the balance between harnessing natural resources for human use while ensuring the safety and integrity of the infrastructure for future generations.