Jussila Bow is a privately owned irrigation structure located in Donnelly, Idaho, in the Valley County region. Completed in 1949, this earth dam stands at a height of 22.6 feet and serves the primary purpose of irrigation, with a normal storage capacity of 175 acre-feet. The dam spans a length of 325 feet and is situated on Wilhelm Creek and Boulder Creek, making it a crucial water resource for the area.

Despite its age, Jussila Bow has been assessed to be in fair condition as of June 2019, with a significant hazard potential due to its location and structural makeup. The dam features an uncontrolled spillway with a width of 24 feet, allowing for a maximum discharge of 128 cubic feet per second. The risk assessment for Jussila Bow is moderate, indicating a level 3 risk, prompting the need for ongoing monitoring and management measures to ensure the safety and functionality of this vital water management infrastructure in the region.