State Route 29/State Route 221 Soscol Junction Improvement Project [California Endangered Species Act (CESA) Incidental Take Permit No. 2081-2021-020-03 (ITP

3 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 4 (DOT)
Document Title
State Route 29/State Route 221 Soscol Junction Improvement Project [California Endangered Species Act (CESA) Incidental Take Permit No. 2081-2021-020-03 (ITP
Document Type
NOD - Notice of Determination
Document Description
The California Department of Transportation (Permittee) proposes in association with the Napa Valley Transportation Authority the construction of a tight diamond interchange with two multi-lane roundabouts on either side of SR-29. SR-29 will be rebuilt as an overcrossing north of the intersection with SR-221, providing separation between SR-29 and the SR-221 northbound ramp and the adjacent roundabout entry. SR-29 will continue to operate with two lanes in each direction. SR-221 will include two roundabouts with two lanes southbound and connecting to eastbound SR-29 and one lane northbound traveling from Soscol Ferry Road transitioning to SR-221 and single-lane ramp connectors from southbound SR-221 to westbound SR-29, and eastbound SR-29 to southbound on Soscol Ferry Road. The existing ramp connector from westbound SR-29 to northbound SR-221 will remain in place. The Project will include standard shoulders, curbs, gutters, and existing signage would remain in place. New signage will also be located within the Caltrans Right of Way (ROW). The Project will also include pedestrian and bicycle circulation, drainage work, landscaping, utilities, ground disturbance, earthwork and restoration. The Project will occur in six stages over the course of three construction seasons from 2022 to 2024. The Project has an 87.87-acre Biological Study Area (BSA) that encompasses the Soscol Junction Interchange and all of the Caltrans Right-of-Way (ROW), collectively, the Project Area. The Project is expected to cause the permanent loss of 7.25 acres, the temporary loss of 10.09 of foraging habitat for the Covered Species, for a total of 17.34 acres of impact. This Project is also expected to cause the potential loss of one (1) known nesting occurrence within the Project Area. Project activities and their resulting impacts are expected to result in the incidental take of individuals of the Covered Species. The activities that are expected to result in incidental take of individuals of the Covered Species include initial site setup, equipment and material delivery, clearing and grubbing, site preparation, exclusionary fencing installations, environmentally sensitive area fencing installations, pavement and concrete removal, concrete pump truck activities, soil excavation, soil compaction, grading work, pavement installation, heavy equipment operation, trenching, construction vehicle traffic, general vehicle traffic and personnel on foot. The project is expected to result in incidental take of Swainson’s hawk take as defined by Fish and Game Code in the form of adverse impacts from excessive artificial light pollution, noise from the operation of heavy equipment and encroachment from individuals on foot that may result in nest abandonment and the loss of Covered Species eggs or juveniles, or in the form of capture to recover and transport injured Covered Species to care facilities of Swainson’s hawk, designated as a threatened species under CESA. The ITP referenced above as issued by CDFW authorizes incidental take of species listed under CESA that may occur as a result of Project implementation.

Contact Information

Robert Stanley
Agency Name
Responsible Agency
Job Title
Senior Environmental Scientist (Specialist)
Contact Types
Responsible Agency


San Francisco Bay Area
Other Location Info
The State Route 29 (SR-29) – State Route 221 (SR-221) Soscol Junction Improvement Project (Project) is located on SR-29 from Post Mile (PM) 5.6 to 6.7 and on SR-221 from PM 0.0 to 0.4. in unincorporated Napa County, California in the Cuttings Wharf, United States Geological Survey (USGS) quadrangle.

Notice of Determination

Approving Agency
California Department of Fish and Wildlife
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Final Environmental Document Available at
The Mitigated Negative Declaration prepared by the lead agency for the Project is available to the general public at the office location listed above for the lead agency. CDFW’s administrative record of proceedings related to the incidental take permit is available to the public for review at CDFW’s regional office.


(1) The project will have a significant impact on the environment
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
(3) Mitigated measures were made a condition of the approval of the project
(4) A mitigation reporting or monitoring plan was adopted for this project
(5) A Statement of Overriding Considerations was adopted for this project
(6) Findings were made pursuant to the provisions of CEQA


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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