Hackamore Reservoir, located in Modoc, California, is a Federal-owned water resource managed by the USDA Forest Service. Completed in 1907, this Earth-type dam stands at 10 feet high and spans 375 feet in length, with a storage capacity of 410 acre-feet. The reservoir serves multiple purposes, including fire protection, livestock watering, and as a small fish pond, making it a crucial resource for the surrounding area.

With a drainage area of 20.7 square miles and a maximum discharge capacity of 402 cubic feet per second, Hackamore Reservoir plays a vital role in the local ecosystem's water management. The reservoir's spillway is uncontrolled, with a width of 30 feet, and its outlet gates are also uncontrolled. Despite being rated as having a significant hazard potential, the dam's condition assessment is currently not rated, highlighting the need for ongoing monitoring and maintenance to ensure its safety and functionality.

Water resource and climate enthusiasts will appreciate the historical significance and operational importance of Hackamore Reservoir, as well as the potential risks associated with its maintenance and management. As a key element in the region's water infrastructure, this reservoir serves as a critical resource for both human and ecological needs, making it essential to prioritize its upkeep and sustainability in the face of changing environmental conditions.