Pyramid Dam, located in Piru, California, is a state-regulated structure built in 1974 by the California Department of Water Resources (DWR) for water supply purposes. Standing at a height of 400 feet and with a hydraulic height of 380 feet, the dam plays a crucial role in flood risk reduction, hydroelectric power generation, recreation, and water supply for the region. With a storage capacity of 171,000 acre-feet and a surface area of 1,290 acres, Pyramid Dam is a key component of the water resource infrastructure in Los Angeles County.

Managed by the Federal Energy Regulatory Commission (FERC), Pyramid Dam has a controlled spillway with a width of 40 feet and is equipped with a Tainter radial gate for water release. The dam has a high hazard potential and is subject to regular inspections and state enforcement to ensure its structural integrity and safety. Despite its importance in water management, the condition assessment of Pyramid Dam is currently marked as not available, highlighting the need for ongoing monitoring and maintenance to mitigate risks associated with its operation.

As a vital water supply source for the region, Pyramid Dam's risk assessment is classified as very high, emphasizing the critical role it plays in managing water resources in the area. With its strategic location on Piru Creek and its significant storage capacity, Pyramid Dam serves as a cornerstone for ensuring water security, flood protection, and sustainable development in Los Angeles County.