Pioneer is a privately owned irrigation structure located in King Hill, Idaho, on Clover Creek and the Snake River. Built in 1910 by AandE and USDA NRCS, this earth dam stands at a height of 14.6 feet and has a hydraulic height of 8.6 feet, serving its primary purpose of irrigation. With a normal storage capacity of 844 acre-feet and a surface area of 220 acres, Pioneer plays a crucial role in water resource management in the region.

Managed by the Idaho Department of Water Resources, Pioneer is regulated, inspected, and enforced to ensure its safety and functionality. The dam has a spillway type of Controlled with a width of 203 feet and a maximum discharge capacity of 3080 cfs. Despite being assessed as in fair condition during its last inspection in April 2018, Pioneer has a significant hazard potential due to its location and capacity, necessitating regular monitoring and risk assessment to prevent potential disasters.

As a key component of the irrigation infrastructure in Gooding County, Idaho, Pioneer serves as a vital resource for water supply and agricultural activities in the region. With its historical significance dating back over a century, this earth dam continues to play a crucial role in water management and climate resilience efforts, highlighting the importance of maintaining and monitoring such structures for sustainable water resource management in the face of changing climate conditions.