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
Irvine Ranch Water District
Lead/Public Agency
15600 Sand Canyon Avenue
Irvine, CA 92618

Phone : (949) 453-5326
Nicole Dubois
LSA Associates, Inc.
Consulting Firm
20 Executive Park, Site 200
Irvine, CA 92614

Phone : (949) 553-0666


33°39'56.16"N 117°39'53.136"W
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

Review Period Start
Review Period End
Development Type
Water Facilities (Recycled Water Pump Station and Intertie)(Type Pump Station, MGD 3.24)
Local Action
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
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


Environmental Document
NOI + Draft ISMND   PDF 20572 K SCH Summary Form - IRWD Zone B to C Pump Station   PDF 594 K
NOC- IRWD Zone B to C Pump Station Project   PDF 560 K

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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