Colusa 20 Shoulder Widening

5 Documents in Project


SCH Number
Lead Agency
California Department of Transportation, District 3 (DOT)
Document Title
Colusa 20 Shoulder Widening
Document Type
NOD - Notice of Determination
Document Description
The Project is limited to vegetation and tree removal, dewatering of emergent wetlands with ephemeral connectivity to the Steer Ditch Canal, installation (trenching, placement, and removal) of giant garter snake (GGS) exclusion fencing, excavation and soil importation to construct the expanded shoulders and bioswales, grading of the embankments to create the side slopes, and permanent erosion control and hydroseeding. The Project will result in impacts to 8.22 acres of giant garter snake (Thamnophis gigas) habitat; the Project will permanently remove 8.22 acres of giant garter snake habitat. The Project is expected to result in incidental take of giant garter snake which is designated as a threatened species under the California Endangered Species Act. 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

Harvey Tran
Agency Name
Department of Fish and Wildlife
Contact Types
Responsible Agency


Northern California
Other Location Info
The Project is located on State Route 20 (SR-20) along emergent wetlands that are ephemerally connected to the irrigation canal (Steer Ditch Canal) that is tributary to the Colusa Trough and the Sacramento River, in the County of Colusa, State of California. The post miles for this Project are COL-20 PM 34.8 to 36.5.

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 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.

Download CSV Download All Attachments New Search Print