Minor Alteration No. WA2026047 – Ryer Island Discharge Pipe Replacement Project
Summary
SCH Number
2026060299
Public Agency
Central Valley Flood Protection Board
Document Title
Minor Alteration No. WA2026047 – Ryer Island Discharge Pipe Replacement Project
Document Type
NOE - Notice of Exemption
Received
Posted
6/8/2026
Document Description
To replace a section of PVC irrigation distribution pipe with a new 66 foot long and
18-inch diameter PVC pipe. The irrigation pipe being repaired is located approximately 20-feet from the landside levee toe within an SSJDD easement landward of the standpipe used for distribution. A flexible coupler and concrete collar will be poured to transition from the steel to plastic pipe. Depth and elevation will remain the same. Backfill will be existing native soil. Repair will start from 20 feet from the toe of the levee and continue landward to the irrigation ditch. No maintenance will be done on the pipe going through the levee. The discharge pipe is authorized under Permit 948-1.
Contact Information
Name
Jennifer Calles
Agency Name
Central Valley Flood Protection Board
Job Title
Senior Environmental Scientist
Contact Types
Lead/Public Agency
Phone
Name
Richard Hamilton
Agency Name
Hamilton Montezuma Properties, LLC
Job Title
Project Manager
Contact Types
Project Applicant / Parties Undertaking Project
Phone
Location
Coordinates
Cities
Rio Vista
Counties
Solano
Regions
Northern California
Waterways
Steamboat Slough
Other Location Info
The proposed project is located on the right bank of Steamboat Slough at levee mile 0.39 on Ryer Island Unit No. 01 Steamboat Slough levee, in Solano County (38°14'57.2"N, 121°36'11.2"W).
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 2 and Class 1 (CEQA CCR, Title 14, Sections 15302 and 15301)
Reasons for Exemption
The project is exempt from CEQA under the Class 2, Replacement or Reconstruction categorical exemption (California Code of Regulations, Title 14, 15302), because the activity consists of replacement and reconstruction of an existing structure in the same site and will have substantially the same purpose and capacity as the replaced structure. In addition, the project is exempt from CEQA under the Class 1, Existing Facilities categorical exemption (California Code of Regulations, Title 14, Section 15301), because the activity consists of the operation, repair, maintenance, permitting, leasing, licensing or minor alteration of existing public or private structures, facilities, mechanical equipment, or topographical features, involving negligible or no expansion of use. No expansion of existing or former use will occur. Further, none of the exceptions to the exemption in California Code of Regulations, Title 14, Section 15300.2 apply.
County Clerk
Solano
Attachments
Notice of Exemption
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