Topaz Lake, located in Mono County, California, is a vital reservoir managed by the public utility for flood risk reduction, irrigation, and water supply. The earth dam, standing at 11 feet tall, was completed in 1937 and has a storage capacity of 59,600 acre-feet. The reservoir covers an area of 2,200 acres and is fed by the Walker River, providing essential water resources for the region.

With its high hazard potential, Topaz Lake is regularly inspected and maintained to ensure its structural integrity and safety. The dam has been deemed to be in satisfactory condition, with the last assessment conducted in September 2017. The public utility is responsible for the operation, inspection, and enforcement of regulations to mitigate risks and ensure the reservoir's continued functionality in the face of climate challenges.

Topaz Lake serves as a crucial water management infrastructure in California, supporting various purposes and providing essential resources to the surrounding communities. As climate change poses increasing threats to water resources, the proper regulation and maintenance of reservoirs like Topaz Lake are paramount to safeguarding the region's water supply and mitigating flood risks for the future.