Lehigh Cement and Permanente Quarry Information

Although the hills outside the City of Cupertino have been mined for limestone since the early 1900s, and the Lehigh cement plant operational since 1958, this heavy industry is now located adjacent to residential neighborhoods, creating ongoing environmental, health and safety challenges. When Supervisor Simitian returned to the Board of Supervisors in 2013, he pushed for increased oversight at Lehigh, holding the company accountable to environmental regulations and aiding the public’s understanding of and access to the state, federal and local agencies that have jurisdiction over the site.

View a video of the March 3, 2021 community meeting here and read the meeting presentation here. If you are interested in specific questions, please see Asked Questions for a time-stamped list of asked and answered questions during the meeting and for a list of the submitted questions that we didn’t get to at the meeting but panelists have since provided written answers to click here​

Prior Public Meetings

View a video of the February 13, 2020 community meeting here​

Answers to unasked questions from the February 13, 2020, Lehigh Public Meeting

View a video of the February 28, 2019 community meeting here​

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