Alameda County approves Mosaic Project conditional use permit amid water and wildfire concerns

Apr 16, 2026

After hours of testimony from students, scientists and longtime canyon residents, the Alameda County Board of Supervisors voted 3–1–1 on April 16 to adopt staff findings, certify the environmental review and approve a conditional use permit for the Mosaic Project at 17015 Coal Canyon Road. The decision requires multiple state and county permits before construction can begin.

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The Alameda County Board of Supervisors voted on April 16 to approve a conditional use permit (PLN 202093) for the Mosaic Project, a proposed outdoor education campus on a 37-acre site at 17015 Coal Canyon Road, near Castro Valley. The motion to adopt staff’s resolution — including the four CUP findings, certification of the final environmental impact report using the reduced-footprint alternative, and approval of mitigation and monitoring measures — passed on a roll-call vote: Supervisor Marquez: Aye; Supervisor Tam: Aye; Supervisor Miley: No; Supervisor Fortunato Bass: Aye; President Halbert: Abstain.

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