Blanchard Creek, located in Bonner County, Idaho, is a privately owned irrigation dam completed in 1910. The dam, made of concrete with a multi-arch core and supported by rock and soil foundations, stands at a height of 19 feet with a hydraulic height of 16 feet. The reservoir created by the dam has a storage capacity of 240 acre-feet and covers a surface area of 37.5 acres, serving the primary purpose of irrigation for the surrounding area.

With a drainage area of 34 square miles, Blanchard Creek has a maximum discharge of 108 cubic feet per second and features an uncontrolled spillway 7 feet wide. Despite its age, the dam is in poor condition and has a significant hazard potential, requiring inspections every 4 years. The risk assessment for the dam is moderate, and while emergency action plans have not been updated recently, the dam is regulated and permitted by the Idaho Department of Water Resources.

Given its historical significance and importance for irrigation in the region, efforts to improve the structural integrity and safety of Blanchard Creek Dam are essential to ensure its continued function and minimize risks to downstream communities and the environment. Climate enthusiasts and water resource advocates may find opportunities to support restoration and maintenance initiatives for this vital water infrastructure in Bonner County, Idaho.