Murphys Afterbay, located in Calaveras, California, is a public utility facility primarily used for hydroelectric power generation and irrigation. The dam, completed in 1953, stands at a height of 42.5 feet and has a storage capacity of 31 acre-feet. The structure is regulated by the California Department of Water Resources and undergoes regular inspections to ensure its safety and compliance with state regulations.

Situated on Angels Creek, the Murphys Afterbay plays a crucial role in managing water resources in the region. The dam's controlled spillway and Tainter gates help regulate water flow and prevent flooding during periods of high discharge. With a hazard potential rated as high and a risk assessment indicating a very high risk level, the facility is closely monitored to mitigate potential threats and ensure the safety of surrounding communities and infrastructure.

Despite its age, the Murphys Afterbay continues to be a vital piece of California's water infrastructure, providing essential services for both energy production and agriculture. As climate change impacts water resources across the state, facilities like the Murphys Afterbay will play an increasingly important role in managing water supplies and mitigating the effects of a changing climate on the region's ecosystems and communities.