Syphon Reservoir Improvement Project


SCH Number
Lead Agency
Irvine Ranch Water District
Document Title
Syphon Reservoir Improvement Project
Document Type
NOP - Notice of Preparation
Present Land Use
Orange County GP: Open Space Reserve; Unincorporated Orange County Zoning: A1 (General Agriculture); Orange County NCCP Reserve

Document Description
The proposed Syphon Reservoir Improvement Project (proposed project) would increase the capacity of the existing recycled water reservoir to serve the community's seasonal and future recycled water needs. The reservoir capacity would increase from approximately 500 acre-feet (AF) to 5,000 AF. As a part of the reservoir expansion, the existing engineered dam would be replaced with a new engineered dam that would meet and exceed the latest safety standards.

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

Phone : (949) 453-5300


33°42'38"N 117°43'52"W
Cross Streets
Portola Parkway and Bee Canyon Access Road
Total Acres
Parcel #
State Highways
Stonegate Elementary, Crean Lutheran Highschool,
Syphon Reservoir, Bee Canyon Washcess Road
Other Location Info
Schools: Eastwood Elementary

Notice of Completion

Review Period Start
Review Period End
Development Type
Water Facilities (Reservoir Expansion)(5,000 MGD)
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 Wildlife Growth Inducing Land Use Cumulative Effects
Reviewing Agencies
Air Resources Board, Major Industrial Projects Cal Fire California Department of Conservation California Department of Parks and Recreation California Department of Transportation, Division of Transportation Planning California Highway Patrol Department of Toxic Substances Control Office of Emergency Services, California Office of Historic Preservation Resources Agency Resources, Recycling and Recovery State Water Resources Control Board, Division of Water Quality California Native American Heritage Commission Department of Water Resources California Department of Fish and Wildlife, South Coast Region 5 California Department of Transportation, District 12


Environmental Document
NOP   PDF 3537 K
Letter   PDF 169 K NOC   PDF 1733 K
State Comments
2019080009_CDFW_Syphon Reservoir NOP comments   PDF 2064 K 2019080009_DOT_2019-01193 Syphon Reservoir Improvment Cmnt   PDF 98 K 2019080009_DWR_DSOD Comment_Syphon Reservoir Improvement Project   PDF 87 K 2019080009_NAHC_NOP Syphon Reservoir Improvement Project 8   PDF 167 K

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