NEV-20 Omega Curve Realignment Project

4 Documents in Project


SCH Number
Lead Agency
Caltrans 3 (Marysville) (California Department of Transportation, District 3)
Document Title
NEV-20 Omega Curve Realignment Project
Document Type
JD - Joint Document
Project Applicant
Present Land Use
highway, forest

Document Description
The California Department of Transportation (Caltrans) proposes to improve two non-contiguous segments of the alignment of State Route (SR) 20 in Nevada County between post miles (PM) 29.7-30.9 and 36.8-39.8 by modifying the existing horizontal and vertical curves of the roadway and adding turnouts. This project will update the roadway to current standards by increasing the curve radii, widening shoulders to 8 feet, adding turnouts for both directions, and improving the vertical profile grade. Additionally, this project will improve the clear recovery zone (CRZ) by removing obstacles and flattening slopes close to the traveled way. Two main project segments occur between PM 29.7-30.9 and 36.8-39.8 are referred to as White Cloud and Lowell Hill segments respectively.

Contact Information
Erin Damm
703 B Street
Marysville, CA 95901

Phone : (530) 741-5387


Nevada City Washington | Cisco Grove
Northern California
Cross Streets
White Cloud Campground, Excelsior Point Road, Lowell Hill Road, forest roads
State Highways
Other Location Info
post miles 29.7-30.9 and 36.8-39.8
Other Information
Two non-contiguous segments of highway between Nevada City and the I-80 / SR-20 interchange.

Notice of Completion

Review Period Start
Review Period End
Development Type
Transportation (Safety Project; curve alignment)
Project Issues
Aesthetic/Visual Biological Resources Recreation/Parks
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Fish and Wildlife, Habitat Conservation Planning California Department of Fish and Wildlife, North Central Region 2 California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of Resources Recycling and Recovery California Department of Transportation, District 3 California Department of Water Resources California Governor's Office of Emergency Services California Native American Heritage Commission California Natural Resources Agency California Regional Water Quality Control Board, Central Valley Sacramento Region 5 California Regional Water Quality Control Board, Lahontan South Lake Tahoe Region 6 California State Lands Commission Central Valley Flood Protection Board Office of Historic Preservation State Water Resources Control Board, Division of Water Quality Tahoe Regional Planning Agency Department of Toxic Substances Control California Highway Patrol


Environmental Document
Joint Document ISMND-EA For Omega Curves Project   DOCX 17433 K
NOC 2020-02-10   PDF 841 K
State Comments
2020020181_CHP Comment   PDF 220 K 2020020181_NEV-20 Omega Curve Realignment Project   PDF 1802 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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