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

Bracken Cave Bat Experience


Wednesday, September 22, 2021: 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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Within days, diesel fuel constituents started showing up in both Comal Springs and Hueco Springs, in New Braunfels.

Area Quarries Polluting Comal Springs? Not Just a Possibility


Is there an underground connection linking quarries to Comal Springs? In 2000, 2,800 gallons of diesel spilled at the Cemex quarry, then showed up in Comal and Hueco Springs a few days later.

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Liquid from Apparent Breach in Tailing Pond Dam from Anderson Columbia Quarry in Edwards Aquifer Recharge Zone, Comal County, Texas

Apparent Breach in Tailing Pond Dam from Quarry in Edwards Aquifer Recharge Zone


A resident near the Anderson Columbia quarry in New Braunfels observed a thick, chalky liquid flowing across his property and farm—apparently coming from a quarry tailing pond breach.

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An aerial view of the Vulcan Materials quarry, located north of Loop 1604 in San Antonio.

Fight Against Vulcan Goes On


As 2019 draws to a close, we are so grateful to all our supporters and volunteers in the ongoing battle against the planned Vulcan quarry between New Braunfels and Bulverde.

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Interior quarry construction road (unregulated source point)

What We Have Learned About the Air We Breathe


Local scientists perform sampling of air quality, contaminant pollution levels, uncover pollution far above EPA safety thresholds in Comal County, Texas.

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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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View of Hill Country in Comal County, Texas

Texas Hill Country at Risk from Aggregate Mining


The unique natural resources of the Texas Hill Country are at increasing risk from aggressive expansion by aggregate mining companies proposing numerous rock quarries and cement plants throughout the region.

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Family walking outdoors, enjoying nature in Hill Country

Thank You for Contributing!


Over 200 neighbors have donated and together raised over $22,000—22 percent of our goal! We are grateful for your generous support to protect our families and preserve our beautiful Hill Country!

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4 x 8 Stop Vulcan Quarry Yard Sign. Comal County, Bulverde, New Braunfels, Garden Ridge, Spring Branch.

Yard Signs Available


We’ve worked with 1st Source Digital to produce signs expressing your opposition to the quarry. Posting signs in highly visible locations is a great way to get the word out!

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