Poison Springs, also known as Fee Reservoir, is a privately owned dam located in Modoc, California, along Rock Creek. Built in 1957 for flood risk reduction, irrigation, and water supply, this earth dam stands at 43 feet tall with a hydraulic height of 36 feet. Covering a surface area of 493 acres and having a drainage area of 48.5 square miles, Poison Springs has a storage capacity of 7,120 acre-feet.

Managed by the Natural Resources Conservation Service, Poison Springs has been inspected regularly, with its last assessment in September 2017 deeming its condition satisfactory and its hazard potential low. Despite its remote location in the northeast corner of California, the dam plays a crucial role in managing water resources for the surrounding area. With state regulation in place for permitting, inspection, and enforcement, Poison Springs continues to serve its primary purpose of flood risk reduction while supporting irrigation and water supply needs.

Water resource and climate enthusiasts can appreciate the significance of Poison Springs in maintaining water security and mitigating flood risks in the region. Its strategic location and design demonstrate the importance of effectively managing dams for multiple purposes while ensuring compliance with state regulations to protect both the dam's integrity and the surrounding environment. Through regular inspections and maintenance, Poison Springs continues to be a vital asset for water management in Modoc, California.