Dorris Dam, located in Alturas, California, is a Federal-owned structure primarily used for irrigation purposes. Completed in 1930, this earth dam stands at a height of 25 feet with a hydraulic height of 23 feet and a length of 3860 feet. It has a storage capacity of 33,000 acre-feet and covers a surface area of 843 acres. The dam is situated on Stockdill Slough and is managed by the Fish and Wildlife Service.

The dam has undergone various modifications over the years, including in 1951, 1973, 1983, 2010, and 2018, to enhance its functionality and safety. It features uncontrolled spillways with a width of 72 feet and slide (sluice gate) outlet gates. Despite being classified as having a high hazard potential, the dam is currently assessed to be in fair condition as of the last inspection in July 2019.

With a moderate risk assessment rating, Dorris Dam plays a crucial role in managing water resources in the region. Its unique design and strategic location make it a key infrastructure for water supply and irrigation in Modoc County, California. Water resource and climate enthusiasts will find Dorris Dam to be a fascinating structure that contributes significantly to the local ecosystem and agricultural activities in the area.