Grinding Rock is a vital water resource infrastructure in California, specifically located in Snelling, Tuolumne County. This earth-type dam was completed in 1979 and stands at a height of 55 feet, with a hydraulic height of 50 feet, serving the primary purpose of water supply. With a storage capacity of 330 acre-feet, the dam plays a crucial role in flood risk reduction, irrigation, and water supply for the surrounding area. Managed by a public utility, Grinding Rock is regulated and inspected by the Department of Water Resources, Safety of Dams division, ensuring its continued safe operation for the community.

The dam's low hazard potential and satisfactory condition assessment as of 2017 reflect its robust construction and ongoing maintenance. With an associated drainage area of 0.2 square miles and a surface area of 14 acres, Grinding Rock contributes significantly to the water management efforts in the region. Its location on the Tr Turnback Creek, under the jurisdiction of the state of California, highlights its importance in meeting the water needs of the local population and supporting agricultural activities in the area.

Grinding Rock's history of reliable water supply and its role in mitigating flood risks make it a critical asset for the community. As part of the water infrastructure network in California, this dam stands as a testament to effective water resource management and serves as a reminder of the interconnected relationship between water resources and climate resilience in the region.