Buchanan is a federal water resource located in Modoc, California, with a primary purpose of fire protection, stock, or small fish pond. Built in 1890, this earth dam stands at 7 feet high and stretches across 480 feet, providing a storage capacity of 93 acre-feet. Managed by the Forest Service, Buchanan serves multiple purposes including irrigation, fish and wildlife habitat, and other recreational activities.

Despite being classified with a low hazard potential, Buchanan is considered to have a moderate risk level based on a risk assessment score of 3. The dam has not been rated for its condition assessment and last underwent inspection in August 2010, with a scheduled inspection frequency of 10 years. The dam features an uncontrolled spillway and outlet gates, indicating potential concerns for water management and emergency response. Water resource and climate enthusiasts should keep an eye on Buchanan for updates on risk management measures and any potential modifications to enhance its safety and efficiency.