Located in San Luis Obispo, California, Lopez Lake, also known as Lopez, is a local government-owned reservoir with a primary purpose of water supply. Completed in 1969, this earth dam structure stands at 166 feet tall, with a hydraulic height of 150 feet and a length of 1120 feet. With a storage capacity of 52,500 acre-feet and a surface area of 950 acres, Lopez Lake plays a crucial role in irrigation, recreation, and water supply in the region.

Managed by the California Department of Water Resources and regulated by the Safety of Dams program, Lopez Lake is inspected regularly to ensure its structural integrity and overall safety. With a high hazard potential and a satisfactory condition assessment, the dam is closely monitored and maintained to meet necessary safety standards. In case of emergencies, protocols are in place, though specific details on emergency action plans and risk mitigation measures are not provided in the data.

The reservoir's location near Arroyo Grande and its association with the Arroyo Grande Creek make it a significant water resource in the area. With its key role in providing water for various purposes and its critical infrastructure status, Lopez Lake serves as a vital component of the region's water management system, supporting both the local community and the surrounding environment.