Elkington is a private irrigation dam located in Shelley, Idaho, within Bonneville County. The dam, completed in 1994, stands at a height of 35.3 feet and has a normal storage capacity of 90 acre-feet. It serves the primary purpose of irrigation and is regulated by the Idaho Department of Water Resources, with state permitting, inspection, and enforcement in place.

The dam is constructed primarily of earth and stone materials, with a spillway width of 10 feet and a maximum discharge capacity of 196 cubic feet per second. Despite its low hazard potential and fair condition assessment, Elkington is subject to moderate risk, with a risk assessment rating of 3. The dam is situated along Squaw Creek and Willow Creek, and its drainage area covers 5.3 square miles.

Elkington's location in the Walla Walla District and its association with federal agencies like the US Army Corps of Engineers contribute to its operational oversight. With a history of regular inspections and a five-year inspection frequency, the dam remains a vital resource for irrigation in the region, highlighting the importance of maintaining and managing water resources in the face of changing climate conditions.