Culver Dr. and Alton Pkwy. Intersection Improvement Project (CIP 311905)


SCH Number
Lead Agency
City of Irvine
Document Title
Culver Dr. and Alton Pkwy. Intersection Improvement Project (CIP 311905)
Document Type
MND - Mitigated Negative Declaration
Present Land Use

Document Description
The proposed Project entails minor widening and lane restriping of the intersection at Culver Drive and Alton Parkway, within the City of Irvine, including the following improvements: • Adding a fourth northbound through lane on Culver Drive; • Removing the southbound free right turn lane on Culver Drive and converting it to a standard right turn lane; and removal of the existing pedestrian island; • Adding a southbound right turn overlap phasing on Culver Drive coordinated with the eastbound dual left turn phasing on Alton Parkway (prohibiting eastbound U-turn movement); • Extending the eastbound and westbound left turn pockets in both directions on Alton Parkway approaching the intersection at Culver Drive; • Adding concrete bus pads at existing bus stops located at the northeast (Culver Drive), northwest (Alton Parkway) nearest the retail business at 3755 Alton Parkway, currently occupied by Olive Garden Italian restaurant, and southeast (Alton Parkway) corners of the intersection; • Adding a new bus stop and bus pad on the northwest corner (Alton Parkway) of the intersection nearest to the retail business at 3995 Alton Parkway, currently occupied by Starbucks coffee shop; • Modify / improve supporting traffic signal, medians, sidewalks, and landscaping, where applicable and; • Providing enhanced striping to the existing on-street bike lanes on all four (4) legs of the intersection. Additional roadway improvements include signage, traffic signals, streetlights, utility relocations, drainage and water quality improvements, retaining walls, landscape, and lighting. The proposed Project is one of the mitigations identified in both 2010 and 2015 Irvine Business Complex (IBC) Vision Plan Traffic Studies and would improve circulation in both the short- and long-term to the intersection by providing capacity enhancements and improve circulation.

Contact Information
Cheryl Lea
City of Irvine
Lead/Public Agency
1 Civic Center Plaza PO Box 1975
Irvine, CA 92623-9575

Phone : (949) 724-7313

City of Irvine
Project Applicant


33°40'51.08"N 117°48'40.83"W
Cross Streets
Culver Drive and Alton Parkway
State Highways
I-405 - 1 mile
BNSF/Metrolink - 1.66 miles
Woodbridge High School - 0.9 miles
San Diego Creek - 0.28 miles

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation:Local Road (Improve Existing Intersection at Culver Dr. and Alton Pkwy.)
Local Action
Project Issues
Aesthetics Agriculture and Forestry Resources Air Quality Biological Resources Coastal Zone Cultural Resources Cumulative Effects Drainage/Absorption Economics/Jobs Fiscal Impacts Flood Plain/Flooding Geology/Soils Greenhouse Gas Emissions 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 Tribal Cultural Resources Vegetation Wetland/Riparian Wildfire Wildlife
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 Parks and Recreation California Department of Transportation, District 12 (DOT) California Department of Transportation, Division of Aeronautics (DOT) California Department of Water Resources (DWR) California Highway Patrol (CHP) California Native American Heritage Commission (NAHC) California Natural Resources Agency California Public Utilities Commission (CPUC) California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB) California State Lands Commission (SLC) Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Drinking Water


Environmental Document
Culver-Alton_NOI_07-02-2020   PDF 122 K ISMND Culver-Alton_Initial_Study_DRAFT 07-2020_Signed   PDF 20075 K ISMND-Appendix A Mitigation Monitoring and Reporting Program   PDF 171 K ISMND-Appendix B Traffic Analysis Memorandum   PDF 4282 K ISMND-Appendix C Conceptual Landscape Plan   PDF 2558 K ISMND-Appendix D Preliminary Drainage Report   PDF 8271 K ISMND-Appendix E Air Quality Technical Study   PDF 19766 K ISMND-Appendix F Data Summary from Biological Reconnaissance Survey   PDF 3951 K ISMND-Appendix G GHG Analysis Report   PDF 19792 K ISMND-Appendix H Initial Site Assessment   PDF 39956 K ISMND-Appendix I Preliminary Water Quality Management Plan   PDF 20281 K ISMND-Appendix J Noise Study Report   PDF 19610 K Summary_Form_for_Document_Submittal_Culver-Alton   PDF 595 K
NOC_Culver-Alton_07-02-2020   PDF 373 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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