Mathews is a crucial water supply infrastructure located in Corona, California, along the Tr Cajalco Creek. Built in 1938, this earth dam stands at a height of 264 feet and has a storage capacity of 182,000 acre-feet. With a surface area of 2,750 acres and a drainage area of 40 square miles, Mathews plays a vital role in providing water for irrigation and domestic use in Riverside County.

Managed by a public utility and regulated by the California Department of Water Resources and Safety of Dams, Mathews is subject to regular inspections to ensure its structural integrity. Despite being classified as having a high hazard potential, the dam's condition was assessed as satisfactory during its last inspection in September 2017. In the event of an emergency, an emergency action plan is in place, although it was last revised in January 2018.

Mathews serves as a critical component of California's water infrastructure, supporting various purposes such as irrigation and water supply. As climate change continues to impact water resources in the region, the maintenance and monitoring of dams like Mathews are essential to ensure a reliable and sustainable water supply for local communities.