Heidelberg Materials details Permanente Quarry operations, creek restoration and reclamation plan; draft EIR expected January 2026

Heidelberg Materials representatives, county regulators and community groups briefed residents at a Cupertino town hall on ongoing activity at the Permanente Quarry, the kickoff of a long‑planned Permanente Creek restoration and the county’s review of a reclamation plan amendment that could bring millions of cubic yards of off‑site fill into the quarry.

Supervisor Margaret Abe‑Koga opened the meeting by saying the panel would address current operations, the creek restoration and the reclamation plan amendment. Rob Salisbury, principal planner for the Santa Clara County Department of Planning and Development, said the company’s reclamation plan amendment application has been deemed complete and that the county is preparing an environmental impact report (EIR). "We expect the draft EIR to be ready for public circulation in January 2026," Salisbury said, and that the draft would be circulated for a 45‑day public comment period before a final EIR and planning‑commission review, currently anticipated in late 2026.

Heidelberg Materials described four ongoing activities at the site: aggregate production (currently operated under a lease by Vulcan Materials), the Permanente Creek restoration project, pre‑demolition work on cement‑plant structures and preparation for long‑term reclamation. Sanjeet Sen, senior environmental manager for the site, said the creek restoration will remove mining overburden, concrete channels and culverts, widen the channel by about 9,000 linear feet within the property and add riparian native vegetation designed to the California Department of Fish and Wildlife restoration manual. "We will give them every opportunity," Sen said when asked whether fish could return after restoration.

County and…