Alder Creek, located in Harney, Oregon, is a privately-owned dam that was completed in 1973 for irrigation purposes. The dam is classified as an Earth type structure with a height of 55 feet and a storage capacity of 800 acre-feet. With a normal storage of 640 acre-feet and a drainage area of 11.3 square miles, Alder Creek plays a crucial role in water resource management in the region.

Managed by the Oregon Water Resources Department, Alder Creek has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment. The dam has a hydraulic height of 40 feet and a structural height of 63 feet, serving as a vital infrastructure for water storage and distribution in the area. With a maximum discharge capacity of 575 cubic feet per second, Alder Creek provides essential water resources for agricultural activities in the region.

Despite its rural location and limited associated structures, Alder Creek remains a key component of the local water management system in Harney County, Oregon. With regular state inspections, permitting, and enforcement in place, the dam ensures the safe and efficient utilization of water resources for irrigation purposes. As a significant feature in the landscape, Alder Creek contributes to the sustainable development and climate resilience of the area, highlighting the importance of responsible water resource management in the face of changing environmental conditions.