San Joaquin Reservoir Filtration Facility


SCH Number
Lead Agency
Irvine Ranch Water District
Document Title
San Joaquin Reservoir Filtration Facility
Document Type
MND - Mitigated Negative Declaration
Project Applicant
Jo Ann Corey, Irvine Ranch Water District
Present Land Use
The Project site zoning and land use designation are both Public Facilities.

Document Description
IRWD is proposing to construct a new filtration facility that will improve the quality of the recycled water transmitted from the San Joaquin Reservoir (SJR) by reducing algae/detritus concentrations. The new filtration facility would be constructed on an existing concrete pad that is north of the existing Flow Control Facility, which is on the north side of the SJR. The proposed filtration facility would be a single-level, above-grade structure that would total approximately 4,000 square feet. Two new filtration pumps would be installed within the filtration building to pump waste washwater from the filtration building to the southern end of the SJR for disposal. The pumps would connect with a proposed concrete at-grade equalization basin, which will be located outside the proposed filtration building. A pipeline would be installed from the equalization basin into the southern end of the SJR to return the filter waste washwater. The new filtration facility will also include an enlarged electrical room, along with a hose, sink/wash basin, emergency shower, and eye-wash station. In addition to the new filtration facility and associated pipeline, the proposed Project includes replacing the booster pumps, located in the existing pump room of the Flow Control Facility on the southern end of the concrete pad, to accommodate the new filters. The operation of the proposed Project would be conducted remotely, and there would not be any full-time dedicated staff at the SJR site.

Contact Information
Jo Ann Corey
Irvine Ranch Water District
15600 Sand Canyon Avenue
Irvine, CA 92618

Phone : (949) 453-5300


33°37'2.7"N 117°50'34.3"W
Newport Beach
Cross Streets
Ford Road and Prairie Road
Total Acres
Parcel #
State Highways
Anderson Elementary
San Joaquin Reservoir, Big Canyon Reservoir

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (Filtration Facility)
Local Action
Project Approval
Project Issues
Aesthetic/Visual Agricultural Land Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Minerals Noise Population/Housing Balance Public Services Recreation/Parks Schools/Universities Septic System Sewer Capacity Soil Erosion/Compaction/Grading Solid Waste Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Fish and Wildlife, South Coast Region 5 California Department of Parks and Recreation California Department of Transportation, District 12 California Department of Water Resources California Governor's Office of Emergency Services California Highway Patrol California Native American Heritage Commission California Natural Resources Agency California Regional Water Quality Control Board, Santa Ana Region 8 Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Drinking Water State Water Resources Control Board, Division of Drinking Water, District 8 State Water Resources Control Board, Division of Water Rights State Water Resources Control Board, Divison of Financial Assistance


Environmental Document
Notice of Intent   PDF 108 K Public Draft IS_MND   PDF 10807 K Summary Form   PDF 195 K
NOC & Attachment   PDF 907 K

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