Orange County Water & Wastewater Multi-Jurisdictional Hazard Mitigation Plan 2024
The Water System Risk and Resilience Assessment (RRA) develops a risk baseline for IRWD critical assets, as well as an analysis of potable water system resilience and recommendations for enhancement. The RRA was prepared in 2020 in accordance with the American Water Infrastructure Act. The RRA identified vulnerabilities similar to the LHMP and includes recommendations for mitigation actions to increase resilience and reduce risk. The Dam Safety Program ensures continual monitoring, inspection, and maintenance for IRWD dams and reservoirs. The Dam Safety Program exceeds current state standards and establishes a Risk-Informed Decision- Making process to identify and reduce risk. The program outlines safe operation and management, design, regulation and oversight, and commitment to community conversation. IRWD has implemented the Dam Safety Program that addresses risk identified in dam portfolio assessment. The Dam Safety Program works with the LHMP to provide a foundation for infrastructure and safety protocols at IRWD’s five “extremely high” hazard dams. The Water Supply Reliability Evaluation (Evaluation) provides an updated understanding of how current and projected conditions, such as imported water supply shortages, climate change, and facility outages impact water supply. This Evaluation includes an analysis of IRWD’s ability to maintain a minimum level of service under a reasonably foreseeable hydrologic and system outage conditions and emergency scenarios. The Evaluation, in coordination with the LHMP, evaluates vulnerabilities of drought and climate change, and includes recommendations to maintain water service to IRWD customers. The Cybersecurity Assessment analyzes IRWD’s cybersecurity controls and the ability to remediate vulnerabilities. The assessment provides a high-level analysis of IRWD’s cyber weaknesses, so security teams can begin implementing controls to mitigate them. The assessment in coordination with the LHMP evaluates vulnerabilities related to terrorism and sabotage of IRWD’s technology assets, and work together to implement mitigation actions to reduce risk. The Sewage Treatment Master Plan outlines IRWD's long-term vision for a potable reuse program. Sewage treated at LAWRP could be treated to advanced purified water, conveyed to Baker WTP, and treated again for domestic purposes. This would offset the need for import water and improve IRWD’s drought resiliency. This program can be utilized in coordination with the LHMP to identify and mitigate risks related to drought resiliency. The IRWD Hazardous Materials Emergency Response Plan (HMERP) includes a Hazardous Materials Emergency Response Plan, training for responders responsible for the facility. During a hazardous materials emergency, IRWD would reference industry resources (Department of Transportation’s Emergency Response Guide [ERG]. The IRWD HMERP can be utilized in coordination with the LHMP to manage and mitigate risks related to hazardous materials use.
Water System Risk and Resilience Assessment Responsible Department: IRWD Safety & Security, Engineering, and Operations Departments
Dam Safety Program Responsible Department: Engineering Department
Water Supply Reliability Evaluation Responsible Department: Water Resources & Environmental Compliance, IRWD
Cybersecurity Assessment
Responsible Department: Information Technology, Network and Cyber Security Sewage Treatment Master Plan & Potable Reuse Program Responsible Department: Water Resources, Capital Projects Hazardous Materials Program Responsible Department: IRWD Safety & Security, Regulatory Compliance, and Operations.
O-22
WSCP - 75
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