California Today

Mission Gorge Quarry Expansion Fears in San Carlos

03 June 2026 16:24

Residents near the Mission Gorge rock quarry in San Carlos are dealing with dust, shaking, and noise from the nearly 100-year-old operation, now owned by Vulcan Materials. - David Long and his wife wipe black soot from counters daily and smell tar when asphalt is mixed.

- Residents report homes shaking, artwork falling, and windows compromised from blasting. - Vulcan Materials plans to move blasting 300 feet closer to homes, raising safety concerns.

- A civil case against former owner Superior Ready Mix is pending. The community fears for safety and quality of life as the quarry continues operations without mitigation.

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San CarlosGrantvilleenvironmentsafetycommunitySan Mateo CountyWarning