Where Is the Planned Vulcan Comal Quarry?

Vulcan Materials plans to set up a 1500-acre open-pit limestone quarry in a residential area of central Comal County, located between Bulverde, Spring Branch, Garden Ridge, and New Braunfels.


  • Nearly three miles across
  • One mile fronting SH 46
  • 1½ miles fronting FM 3009
  • Less than one mile from FM 1863
  • ¼ mile from Beck Road

Dust from blasting in gravel quarry similar to proposed Vulcan Materials quarry between Bulverde and New Braunfels

Carcinogenic Dust

All gravel quarries create and emit dust particles strongly associated with health problems such as lung cancer,1 heart disease,2 stroke,3 and reproductive issues.4 The finest particles are invisible and affect residents living miles away from the actual quarry site.

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Dump truck creating a traffic hazard at intersection of Hill Country roads similar to State Highway 46, FM 3009, and FM 1863

Truck Traffic

With the additional gravel-hauling traffic, expect to see an estimated 444 truck loads per hour in the surrounding area. The increased truck traffic will make our roads more dangerous and lengthen travel times. Roadways most impacted will be SH 46, FM 3009, FM 1863, and Beck Road.

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Blasting danger sign near gravel quarry pit similar to the planned Vulcan Comal Quarry between Bulverde and New Braunfels

Property Values

According to studies, properties within a five-mile radius of a new quarry (map above) lose up to 20 percent of their market value.5,6 Over 12,000 people live in the surrounding area. Property valuation losses are estimated at over $100 million.

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Polluted water at site of rock quarry near Comal County

Water Resources

The Vulcan quarry will affect local wells, water levels, and water quality. Impact will come from blasting, destruction of caves, increased storm runoff, and hazardous chemicals entering the water supply.

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News Updates & Info

Vulcan Materials 1604 rock quarry in 2017 showing pools of water over Edwards Aquifer Recharge Zone

Blatant Disregard by TCEQ for Our Water Supply and the Health and Welfare of Texas Hill Country Residents


Texas Commission on Environmental Quality (TCEQ) has approved the Water Pollution Abatement Plan (WPAP) for proposed Vulcan quarry. Why that’s a bad thing and what we can do about it.

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Vulcan Materials 1604 rock quarry in 2017 showing pools of water over Edwards Aquifer Recharge Zone

Water Pollution Abatement Plan (WPAP) Posted


The Water Pollution Abatement Plan (WPAP) is the second and final permit Vulcan needs in order to start mining in their proposed quarry. Here’s what you can do to help stop them.

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2024 Primary candidates for Comal County Commissioner, Precinct 1: Doug Leecock (left), Julie Sanders (center), Joyce Yannuzzi (right)

Comal County Commissioner, Precinct 1 Voter Guide


Doug Leecock, Julie Sanders, and Joyce Yannuzzi are candidates for Comal County Commissioner, Precinct 1, in the 2024 primary election. Voter guide and candidate questionnaire responses.

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Events & Meetings

Bluebonnet Extravaganza Dinner & Auction


Saturday, April 13, 2024: Fifth annual fundraising dinner and auction in Spring Branch. Fabulous four-course meal with local libations, live and silent auctions.

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

Bracken Cave Bat Experience


September 6, 2023: 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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Harrison TPDES wastewater discharge permit, Comal County, New Braunfels, Bulverde, Texas

Harrison Wastewater TCEQ Public Meeting


TCEQ is holding a public meeting June 8, 2023 to discuss the wastewater discharge (TPDES) permit filed by Doug Harrison to dump up to 600,000 GPD of treated sewage into Comal County creeks and aquifers.

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