Miramar is a significant Earth dam located in the city of Miramar, California, completed in 1960 with a height of 165 feet and a hydraulic height of 159 feet. It serves as a crucial water supply structure on Big Surr Creek, providing a storage capacity of 7250 acre-feet and covering a surface area of 162 acres. The dam is under state jurisdiction and regulation, with the Department of Water Resources and Safety of Dams overseeing its permitting, inspection, and enforcement processes.

With a high hazard potential but a satisfactory condition assessment as of 2017, Miramar Dam is a vital infrastructure for the region's water resource management. The dam is owned and operated by the local government, with a primary purpose of water supply. It is situated in San Diego County and falls under the jurisdiction of the Los Angeles District of the US Army Corps of Engineers. Despite its age, the dam has been regularly inspected, with the last assessment conducted in December 2020, ensuring its safety and reliability in the face of potential risks and emergencies.

As an essential component of the water supply system in Miramar, this dam plays a crucial role in storing and regulating water flow from Big Surr Creek. With its strategic location and significant storage capacity, Miramar Dam contributes to the overall water security and resilience of the region, especially in times of drought or increasing water demand due to climate change. Water resource and climate enthusiasts can appreciate the engineering and regulatory aspects of this infrastructure, which highlights the importance of sustainable water management practices in the face of evolving environmental challenges.