Lake Forest Zone B to C Pump Station Project

2 Documents in Project


SCH Number
Lead Agency
Irvine Ranch Water District
Document Title
Lake Forest Zone B to C Pump Station Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Former Lake Forest Well No. 5 Site
Document Description
IRWD is proposing to construct a new pump station to improve the water quality within IRWD’s Zone B to C recycled water system. In addition to the construction of the new Zone B to C Recycled Water Pump Station, the Project would decommission the existing Zone B to C Pump Station, which is located adjacent to the existing IRWD Zone B East Reservoir. The existing pump station has exceeded its useful service life and is not a standard, fully enclosed, IRWD pump station. The demolition of the existing Lake Forest Zone B to C Pump Station would occur after the construction of the proposed new pump station. The proposed Project would also develop a new intertie between the Upper Oso Reservoir and the Lake Forest Zone C distribution system. The intertie meter would be located along Portola Parkway, between El Toro Road and Saddleback Parkway. Construction of the proposed intertie would occur within the third and fourth southbound lanes of travel along Portola Parkway. The proposed intertie would provide the ability to isolate Upper Oso Reservoir from IRWD’s recycled water distribution system. The proposed intertie would be closed during normal operations, but would be available to augment recycled water supplies into IRWD’s Lake Forest Zone C system during maintenance operations of the IRWD system or to deliver excess recycled water flow to Santa Margarita Water District (SMWD) during low-demand periods.

Contact Information

Jo Ann Corey
Agency Name
Irvine Ranch Water District
Contact Types
Lead/Public Agency

Nicole Dubois
Agency Name
LSA Associates, Inc.
Contact Types
Consulting Firm


Lake Forest
Cross Streets
Lake Forest Drive and Portola Parkway/El Toro Road
Total Acres
Parcel #
State Highways
New Thought Montessori Preschool
Upper Oso Reservoir

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, South Coast Region 5 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Transportation, District 12 (DOT), California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB), Department of Toxic Substances Control, State Water Resources Control Board, Division of Drinking Water
Development Types
Water Facilities (Recycled Water Pump Station and Intertie)(Type Pump Station, MGD 3.24)
Local Actions
Site Plan
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Energy, Flood Plain/Flooding, Geology/Soils, Greenhouse Gas Emissions, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mandatory Findings of Significance, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Sewer Capacity, Solid Waste, Transportation, Tribal Cultural Resources, Utilities/Service Systems, Vegetation, Wetland/Riparian, Wildfire


Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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