System Protection at Kohler and Sonoma Creek Crossings (Lake or Streambed Alteration Agreement No. EPIMS-SON-50608-R3)
5 Documents in Project
Summary
SCH Number
2023070286
Lead Agency
Sonoma County Water Agency
Document Title
System Protection at Kohler and Sonoma Creek Crossings (Lake or Streambed Alteration Agreement No. EPIMS-SON-50608-R3)
Document Type
NOD - Notice of Determination
Received
Posted
8/22/2025
Document Description
The California Department of Fish and Wildlife (CDFW) has executed Lake and Streambed Alteration Agreement (EPIMS-SON-50608-R3), pursuant to Fish and Game Code section 1602, to the project Applicant, Sonoma Valley County Sanitation District.
The project is limited to permanent repairs along Kohler and Sonoma creeks to protect Sonoma Valley County Sanitation District (SVCSD) sanitary sewer pipelines that cross Kohler and Sonoma Creeks, using a combination of rock slope protection, fabric reinforced fill structures (FREFs) built with biodegradable fabrics, log rootwad revetments, brush mattresses, and native vegetation. In addition, the pipeline across Sonoma Creek will be armored in its current location with large boulders. The Project will also include revegetation with native plants and installation of habitat improvement elements for aquatic species in Sonoma Creek. In total, the project will result in approximately 20 linear feet (0.01 acres) of permanent impact and approximately 290 linear feet (0.35 acres) of temporary impact to open water habitat, as well as approximately 305 linear feet (0.09 acres) of temporary impact to riparian habitat. Of the 305 linear feet (0.09 acres), 210 linear feet (0.04 acres) includes California freshwater shrimp (Syncaris pacifica) habitat above the wetted potion of Sonoma Creek. The project will also result in the removal of two riparian trees. Access and staging will occur via an existing developed driveway and residential parking area.
Contact Information
Name
James Hansen
Agency Name
CA Department of Fish and Wildlife
Job Title
Environmental Scientist
Contact Types
Responsible Agency
Phone
Name
Dave Cook
Agency Name
Sonoma County Water Agency
Job Title
Lead Agency Contact
Contact Types
Lead/Public Agency
Phone
Email
Location
Counties
Sonoma
Regions
San Francisco Bay Area
Other Location Info
The project is located at Sonoma Creek and Kohler Creek, in the County of Sonoma, State of California; Latitude 38.359021°, Longitude -122.525079°; 13965 Arnold Drive, Glen Ellen, CA, 95442; Assessor’s Parcel Number 054-190-016.
Notice of Determination
Approving Agency
CA Department of Fish and Wildlife
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Sonoma
Final Environmental Document Available at
The Mitigated Negative Declaration prepared for the project is available to the general public at the office location listed above for the Lead Agency. CDFW’s record of project approval as a Responsible Agency is available at CDFW’s regional office.
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No
Attachments
Notice of Determination
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