The California Department of Water Resources (DWR) has embarked on a significant infrastructure modernization project at Lake Perris, located approximately 60 miles east of Los Angeles. The Lake Perris Emergency Release Facility (ERF) project, slated for completion in 2027, represents a critical step in safeguarding public safety and ensuring water security in the face of seismic activity and extreme weather events. The project addresses the vulnerability of the region to earthquakes, given Lake Perris’ proximity to several fault lines, posing a significant risk to the surrounding community of 80,000 residents, as well as crucial infrastructure such as Interstate 215, a nearby water treatment plant, and a local school. The ERF aims to mitigate these risks by providing a controlled mechanism for diverting water away from the lake in emergencies, preventing potential flooding and damage.
The core of the ERF project involves constructing a network of new levees, bridges, and a localized drainage system downstream from the Perris Dam. This infrastructure will enable the safe redirection of water from Lake Perris through designated channels and levees, ultimately leading to the Perris Valley Channel. This controlled release system will be instrumental in mitigating the potential for catastrophic flooding in the event of a major earthquake or extreme weather, protecting lives, property, and vital infrastructure. The project is a crucial component of the broader Perris Dam Modernization Program, a multi-phase initiative旨在提高大坝的安全性和可靠性。
Lake Perris, despite its relatively small capacity of 131,400 acre-feet, plays a vital role in California’s water infrastructure. Serving as the southern terminus of the California State Water Project, the lake provides drinking water and irrigation for agriculture to millions of Californians. The ERF project underscores the importance of this reservoir and the need to protect its functionality in the face of potential natural disasters. The project will ensure the continued delivery of essential water services even under emergency conditions, safeguarding public health and economic stability.
The construction of the ERF represents a complex undertaking, requiring careful management to minimize disruption to the surrounding community and environment. While construction activities will necessitate some localized noise and traffic modifications, access to the popular Lake Perris State Recreation Area and fairgrounds will be maintained throughout the project duration. This 8,800-acre recreational area, encompassing the lake and surrounding landscapes, attracts approximately one million visitors annually, highlighting the need to balance construction activities with public access and enjoyment of this valuable natural resource.
The ERF project is the second phase of a comprehensive three-phase modernization program for the Perris Dam. The first phase, the Perris Dam Remediation Project, focused on strengthening the dam’s foundation and was completed in 2018. The final phase, the Outlet Tower Improvements Project, is scheduled for completion in 2029 and will further enhance the dam’s ability to manage water releases during emergencies, offering even greater control and flexibility in responding to evolving conditions. This holistic approach to dam modernization reflects a commitment to long-term safety and resilience.
By investing in these critical infrastructure improvements, the DWR is taking proactive steps to protect communities, safeguard vital resources, and ensure the reliability of California’s water supply in the face of growing environmental challenges. The Lake Perris ERF project stands as a testament to the state’s dedication to modernizing its water infrastructure, enhancing public safety, and building resilience against the threats posed by earthquakes and extreme weather. This project will not only protect the local community and its resources but also contribute to the long-term sustainability and reliability of California’s water system.
