Serra Siding Extension Project


SCH Number
Lead Agency
Southern California Regional Rail Authority
Document Title
Serra Siding Extension Project
Document Type
NOP - Notice of Preparation
Present Land Use

Document Description
The proposed Project involves the construction of new rail infrastructure within existing railroad ROW, owned by the Orange County Transportation Authority (OCTA). The proposed Project would replace the existing single track within the Project alignment and extend the existing Serra siding south between MP 199.80 and CP Doheny at MP 201.00. Under the proposed Project, the proposed main track and siding would run parallel to each other, 15 feet apart, except where the main track and siding pass above the PCH (i.e., at Bridge 2), where they would run further apart. The existing single-track single-span bridge structure over the PCH would be demolished and replaced by the two new single-track single-span bridge structures. Additionally, the track profiles would be raised where the main tracks and siding tracks cross over PCH to provide additional vertical clearance for vehicular traffic beneath the bridge, per California Department of Transportation (Caltrans) standards and specifications for expressways. The existing CP Serra at MP 199.90 would be retired, and a new intermediate signal would be installed in its place at MP 199.70. At the eastern end of the siding extension, a new CP (CP Doheny) would be added at MP 201.00. An existing at grade crossing south of the Project alignment, located at MP 201.00, where Palisades Drive and Beach Road meet at the PCH, would be unaffected by the Project. Multiple above and underground utilities and drainage facilities within the railroad corridor would be relocated, extended, and/or protected in place as part of the Project. New retaining walls, totaling approximately 1,200 linear feet and ranging from 4 to 15 feet in height, would also be constructed along the Project alignment, where required. Project construction is expected to begin in 2024 and would continue for up to 24 months. Project construction would largely occur within OCTA/SCRRA ROW. Construction staging area locations would be situated adjacent to the OCTA/SCRRA corridor to the greatest extent feasible. Once constructed, the proposed Project would improve safety and reliability within the corridor and would also create additional train capacity with the goal of improving passenger train operations and on time performance for both Metrolink’s Orange County and Inland Empire Orange County Lines.

Contact Information
Chris Haskell
Lead/Public Agency
900 Wilshire Boulevard Suite 1500
Los Angeles, CA 90017

Phone : (213) 452-0242


Dana Point
Citywide Countywide Southern California
Other Location Info
The proposed Project would replace the existing single track within the Project alignment and extend the existing Serra siding south between MP 199.80 and CP Doheny at MP 201.00. The existing CP, CP Serra, will be retired and will become a new intermediate signal, installed at MP 199.70.

Notice of Completion

Review Period Start
Review Period End
Development Type
Local Action
Site Plan
Project Issues
Aesthetics Agriculture and Forestry Resources Air Quality Biological Resources Coastal Zone Cultural Resources Cumulative Effects Drainage/Absorption Economics/Jobs Energy Fiscal Impacts Flood Plain/Flooding Geology/Soils Greenhouse Gas Emissions Hazards & Hazardous Materials Hydrology/Water Quality Land Use/Planning Mandatory Findings of Significance Mineral Resources Noise Public Services Recreation Schools/Universities Solid Waste Transportation Tribal Cultural Resources Utilities/Service Systems Vegetation Wetland/Riparian Wildfire
Reviewing Agencies
California Air Resources Board (ARB) California Coastal Commission (CCC) California Department of Conservation (DOC) California Department of Fish and Wildlife, Marin Region 7 (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 Natural Resources Agency California Public Utilities Commission (CPUC) California Regional Water Quality Control Board, San Diego Region 9 (RWQCB) California State Lands Commission (SLC) 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 Water Quality California Native American Heritage Commission (NAHC) California Department of Fish and Wildlife, South Coast Region 5 (CDFW)


Environmental Document
Serra Siding_NOP_2021-02-08   PDF 1235 K
Serra Siding_NOC_Final_Signed   PDF 242 K
State Comment Letters [Comments from state reviewing agencies]
2021020118_CDFW Comment   PDF 297 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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