Double Decker Cave, near proposed site of Vulcan quarry in Comal County, Texas. Photo courtesy David Ochel.

Quarries Pose a Risk to Local Caves, Water

Landowners discover new chamber in Double Decker Cave, in Comal County, Texas between proposed Vulcan quarry site and Natural Bridge Caverns.

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Bracken Bat Cave in Comal County, between Bulverde and Garden Ridge, Texas

Bracken Cave Bat Experience

Wednesday, September 11, 2019: Experience the spiraling emergence of over 15 million Mexican free-tailed bats—the largest bat colony on the planet—as they begin their evening hunt.

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Woman speaking at public meeting

Resources & Documents

Helpful resources, documents, and tools for protecting our families, preserving our beautiful Hill Country environment, and fighting the proposed Vulcan Materials quarry in Comal County.

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