Reservoir C, located in Modoc, California, is a vital water resource managed by the USDA Forest Service. Constructed in 1911, this Federal-owned earth dam stands at a height of 20 feet and has a storage capacity of 2028 acre-feet, serving primarily as a Fish and Wildlife Pond. With a drainage area of 14.3 square miles, the dam has a controlled spillway and a maximum discharge capacity of 845 cubic feet per second.

Despite its significant hazard potential and very high risk assessment rating, Reservoir C has not been fully assessed for its condition, leaving its structural integrity somewhat uncertain. The dam is equipped with slide (sluice gate) outlet gates, but its last inspection dates back to March 2016, with inspections scheduled every five years. The dam's location and design make it a crucial component in the region's fire protection efforts and in providing water for livestock and smaller aquatic ecosystems. For water resource and climate enthusiasts, Reservoir C presents an intriguing case study in balancing water management for multiple purposes while ensuring dam safety and maintenance in the face of changing climate conditions.