Orange County Water & Wastewater Multi-Jurisdictional Hazard Mitigation Plan 2024
Implement the Syphon Reservoir Improvement Project to increase the capacity of the existing reservoir. The existing dam would be replaced with a new and larger engineered dam and allow for additional recycled water storage during periods of low demand (winter months) for use during periods of high demand. Continue to coordinate with customer cities and the County to ensure proper storm drain maintenance, to prevent localized flooding due to sediment or debris in the drainage system. Continue to support customer cities and the County in community outreach actions regarding the proper handling, storage, and disposal of hazardous materials including runoff contaminants. Following wildfire events continue to partner with CAL FIRE, Orange County Office of Emergency Preparedness, Orange County Fire Authority, and Orange County Sheriff’s Department, to identify the potential for and location of landslide and/or mudflow events associated with heavy rainfall. Establish procedures for staging District vehicles, materials, and equipment at alternative work locations prior to significant storm events. Consider developing and seeking funding for an evaluation program to determine the seismic vulnerability of critical assets. Annually review defensible space, brush clearing and weed abatement needs for all canyon water facilities. Evaluate opportunities to enhance infrastructure building hardscape (including protective walls) and undergrounding power lines as appropriate. Conduct a study to assess canyon facilities: ·Which facilities are in the historic fire field? With increased fire activity, is that area growing/changing? ·Which facilities could be further fire hardened or have protective retaining walls added? ·How should IRWD prioritize any mitigation measures planned? Explore opportunities to partner with external agencies (such as WEROC, local/county police, local/county fire, customer cities, and other water/wastewater providers) to expand opportunities for education regarding hazards and
Annual Operating Budget
Engineering Department
Short Term (3-5 years)
High
22
Drought
Safety, Collection Systems, in coordination with WEROC (external partner) Safety, Public Affairs Communications
Annual Operating Budget
Flood, Coastal Storm, Landslide and Mudflow
Immediate (1-2 years)
23
Low
Annual Operating Budget Annual Operating Budget Annual Operating Budget Annual Operating Budget Annual Operating Budget Annual Operating Budget Annual Operating Budget
Immediate (1-2 years)
Low
24
Hazardous Materials
Engineering, Safety, in coordination with WEROC (external partner)
Landslide and Mudflow, Flood, Coastal Storms, Windstorm Landslide and Mudflow, Flood, Coastal Storms, Windstorm
Immediate (1-2 years)
Low
25
Safety, Fleet, all relevant departments
Immediate (1-2 years) Short Term (3-5 years) Immediate (1-2 years) Short Term (3-5 years)
26
Low
27
Seismic Shaking
Engineering
Medium
Wildfire
Facilities
Low
28
29
Wildfire
Engineering
Medium
Engineering, Water Operations, Collection Systems, Maintenance
Short Term (3-5 years)
Medium
30
Wildfire
Annual Operating Budget
Immediate (1-2 years)
31
All Hazards
All Departments
Medium
O-28
WSCP - 81
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