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File #: PC 25-028    Version: 1 Name: U-23-03 Westervelt
Type: PC-Document Status: PC-Regular
In control: Planning Commission
On agenda: 6/5/2025 Final action:
Title: Public Hearing to consider Use Permit Application No. U-23-03 of Westervelt Ecological Services to develop the Cache Slough Mitigation Bank, a private commercial mitigation bank on approximately 330-acres. The project is located within unincorporated Solano County immediately northeast of the city limits of Rio Vista, at the southernmost reach of the Yolo Bypass at the confluence of Cache Slough, Sacramento River, and Steamboat Slough. The Planning Commission will also consider adoption of a Mitigated Negative Declaration prepared pursuant to the California Environmental Quality Act (CEQA). APNs: 177-110-260 and 177-150-010.
Attachments: 1. A - Planning Commission Resolution, 2. B - Project Location Map, 3. C - Aerial Photograph of Site, 4. D - Zoning Map, 5. E - Existing Site Elevations, 6. F - Proposed Site Elevations, 7. G - Cache Slough Water Crossing Structure, 8. H - Project Site Photographs, 9. I & J - Links to Mitigated Negative Declaration and Response to Comments, 10. K - Public Outreach
Related files: PC 25-029
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title
Public Hearing to consider Use Permit Application No. U-23-03 of Westervelt Ecological Services to develop the Cache Slough Mitigation Bank, a private commercial mitigation bank on approximately 330-acres. The project is located within unincorporated Solano County immediately northeast of the city limits of Rio Vista, at the southernmost reach of the Yolo Bypass at the confluence of Cache Slough, Sacramento River, and Steamboat Slough. The Planning Commission will also consider adoption of a Mitigated Negative Declaration prepared pursuant to the California Environmental Quality Act (CEQA). APNs: 177-110-260 and 177-150-010.

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Published Notice Required? Yes __X__ No _ _
Public Hearing Required? Yes __X__ No _ _

DEPARTMENTAL RECOMMENDATION:

The Department of Resource Management recommends the Planning Commission:

1. Conduct a noticed public hearing; and

2. Adopt a resolution (Attachment A) adopting the Mitigated Negative Declaration and approving Use Permit U-23-03 to develop the Cache Slough Mitigation Bank, a private commercial mitigation bank on approximately 330-acres pursuant to the mandatory findings and subject to the conditions of approval.

EXECUTIVE SUMMARY:

The Planning Commission is being asked to consider a Use Permit application to allow the operation of a commercial mitigation bank. Improvements will be made to the site to re-establish approximately 300 acres of tidal freshwater wetland and floodplain associated vegetation communities.

DISCUSSION:

Setting

The project site encompasses approximately 330 acres at the southernmost reach of the Yolo Bypass, immediately northeast of the city of Rio Vista (see Attachment B, Location Map). The project site is bounded on the north and northeast by Watson Hollow Slough, on the west by the Mellin Levee Extension, on the southwest by the Mellin Levee (a State Plan of Flood Control levee), and on the southeast by Solano County Levee 28, a restricted-height levee along C...

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