Syphon Reservoir Geotechnical Investigations Project

4 Documents in Project


SCH Number
Lead Agency
Irvine Ranch Water District
Document Title
Syphon Reservoir Geotechnical Investigations Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Orange County GP: OS Reserve; Unincorporated Orange County Z: A1; Orange County NCCP Reserve

Document Description
The project would implement geotechnical investigations to evaluate geologic and seismic conditions at the existing Syphon Reservoir site. Additionally, geotechnical explorations would occur to verify the characteristics of the Center Valley Fault, which previously has been documented as inactive. The project would exploratory test pits, borings, and geophysical surveys to characterize the subsurface conditions of the soil and bedrock at each exploration location.

Contact Information
Jo Ann Corey
Irvine Ranch Water District
Lead/Public Agency
15600 Sand Canyon Avenue
Irvine, CA 92718

Phone : (949) 453-5300


33°42'38"N 117°43'52"W
Cross Streets
Portola Parkway and Bee Canyon Access Rd
Total Acres
Parcel #
State Highways
Stonegate ES, Crean Lutheran HS, Eastwood EA

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (Geotechnical investigation)
Project Issues
Aesthetics Agriculture and Forestry Resources Air Quality Biological Resources Cultural Resources Cumulative Effects Flood Plain/Flooding Geology/Soils Growth Inducement Hazards & Hazardous Materials Hydrology/Water Quality Land Use/Planning Mineral Resources Noise Population/Housing Public Services Recreation Schools/Universities Septic System Sewer Capacity Solid Waste Transportation Vegetation Wetland/Riparian Wildfire Wildlife
Reviewing Agencies
Air Resources Board, Major Industrial Projects California Coastal Commission (CCC) California Department of Conservation (DOC) California Department of Parks and Recreation California Department of Transportation, District 12 (DOT) California Highway Patrol California Native American Heritage Commission (NAHC) California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB) California State Lands Commission (SLC) Office of Emergency Services, California Office of Historic Preservation Resources Agency State Water Resources Control Board, Division of Drinking Water Department of Water Resources California Department of Fish and Wildlife, South Coast Region 5 (CDFW)


Environmental Document
Draft_MND_Syphon_Geotech-Website   PDF 218065 K
NOC   PDF 484 K Transmittal and 2nd page of NOC   PDF 362 K
State Comments
CDFW Comment   PDF 533 K DWR Comment   PDF 512 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.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, 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.

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