Aikman is a privately owned dam located in Gem County, Idaho, along the SOUTH FORK WILLOW CREEK and WILLOW CREEK rivers. Built in 1999 for irrigation purposes, this Earth dam stands at a height of 76.6 feet and has a storage capacity of 2000 acre-feet. Despite its high hazard potential, Aikman is currently in fair condition, with the last inspection conducted in December 2020.

The dam features an uncontrolled spillway with a width of 170 feet and slide gates for outlet control. With a drainage area of 20.3 square miles and a maximum discharge capacity of 825 cubic feet per second, Aikman plays a crucial role in water management and agricultural activities in the region. The risk assessment for Aikman indicates a moderate level of risk, highlighting the importance of ongoing monitoring and maintenance to ensure public safety and water resource sustainability.

Managed by the Idaho Department of Water Resources, Aikman is subject to state regulations and inspections to guarantee its structural integrity and compliance with safety standards. With its strategic location and vital role in irrigation, Aikman serves as a significant asset for water resource management in Gem County, Idaho, contributing to the region's agricultural productivity and environmental sustainability.