Minor Alteration No. WA2026034 – Willow Slough Bypass Outlet Structures Replacement Project
21 Documents in Project
Summary
SCH Number
2015052035
Lead Agency
California Department of Water Resources
(DWR)
Document Title
Minor Alteration No. WA2026034 – Willow Slough Bypass Outlet Structures Replacement Project
Document Type
NOD - Notice of Determination
Received
Posted
5/7/2026
Document Description
Approval of Minor Alteration No. WA2026034, under California Code of Regulations, Title 23, Article 3, Section 6, for work within an adopted plan of flood control: At sites 1, 2, 3, 5, 6.0, and 6.1, the scope of work includes reestablishment of levee slopes and subgrade at the pipe outlet on the waterside; installing a rock mat and placing precast headwall assembly; implementing pipe extension with applicable hardware; backfilling behind headwall assembly and placing 6-inch or less diameter riprap at the ends of the wingwalls; and reseeding temporarily disturbed areas with native erosion control seed mix. The proposed work at sites 4.0, 4.1, and 4.2 includes doweling into the existing concrete headwall and concrete slab to form and cast in place headwall/wingwalls up to the height of the levee toe road; backfilling behind headwall assembly and placing 6-inch or less diameter riprap at the ends of the wingwalls; and reseeding all temporarily disturbed areas with typical native erosion control seeds mix. Sites 4.0, 4.1, 4.2, 5, 6.0, and 6.1 will require dewatering. The work will also rehabilitate the levee toe road. All work including excavation and backfill will be performed in accordance with California Code of Regulations, Title 23, Waters, Division 1 (Title 23) standards.
Contact Information
Name
Jordan Robbins
Agency Name
Central Valley Flood Protection Board
Job Title
Senior Environmental Scientist
Contact Types
Responsible Agency
Phone
Name
Scott Kranhold
Agency Name
Department of Water Resources
Job Title
Manager
Contact Types
Lead/Public Agency
Phone
Name
José Salazar
Agency Name
Department of Water Resources
Job Title
Water Resource Engineer
Contact Types
Lead/Public Agency / Project Applicant
Phone
Location
Coordinates
Cities
Unincorporated Yolo County
Counties
Yolo
Regions
Northern California
Waterways
Willow Slough Bypass
Other Location Info
The project is located at 9 sites along a 5-mile span of Willow Slough Bypass right bank and are in unincorporated Yolo County approximately two miles north of Davis, California.
Site 1, DSID 534: 38.597892, -121.739520
Site 2, DSID 536: 38.593430, -121.735488
Site 3, DSID 538: 38.589756, -121.705033
Site 4.0, DSID 542: 38.589676, -121.693089
Site 4.1, DSID 541: 38.589676, -121.693089
Site 4.2, DSID 17729: 38.589676, -121.693089
Site 5, DSID 548: 38.589691, -121.666583
Site 6.0, DSID 551: 38.589665, -121.656853
Site 6.1, DSID 552: 38.589672, -121.656522
Notice of Determination
Approving Agency
Central Valley Flood Protection Board
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Yolo
Final Environmental Document Available at
The EIR, prepared by the lead agency for the project, is available to the general public at the lead agency’s office listed above. The Board’s administrative record related to the Board authorization is available for public review at the Board’s 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
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(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
No
(4) A mitigation reporting or monitoring plan was adopted for this project
No
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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