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

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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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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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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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

Carcinogenic dust created by gravel quarry similar to the planned Vulcan Materials quarry in Comal County

Vulcan Hiding Key Air Pollution Data from Comal County Citizens


Vulcan Materials refuses to disclose key data on contaminants and pollutants they will emit. Comal County citizens deserve to have all the facts.

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Texas State Capitol

Action Alert: HB 3798 Needs Our Support!


HB 3798 needs our support to better regulate aggregate quarries and protect our natural resources. Texas House Environmental Regulation Committee hearing on April 17, 2019.

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An aerial view of the Vulcan Materials gravel quarry, very similar to the proposed Comal County Vulcan quarry

Two Great Bills Need Our Support: HB 509 and HB 2871


We strongly support HB 509 and HB 2871 to better regulate aggregate mining. Texas House Energy Resources Committee hearing on April 8, 2019.

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All News Updates & Info

Events & Meetings

Contested Case Hearing


June 10-12, 2019. Contested case hearing on the merits (i.e., courtroom trial) in Austin. All affected parties should be present at this multi-day SOAH hearing critical to the fight against the proposed Vulcan quarry.

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Castle Avalon

Love Your Honey, Love Your Hill Country Dinner & Auction


Friday, March 29, 2019: Celebrate your love for your honey and Hill Country! Inaugural fundraising dinner and auction at Castle Avalon. Great food, libations, music, silent and live auctions.

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SOAH Preliminary Hearing, March 6, 2019, Comal County Courthouse

SOAH Preliminary Hearing


Wednesday, March 6: SOAH Preliminary Hearing on the air quality permit for the proposed Vulcan quarry in Comal County. To be an affected party, you must attend this hearing in New Braunfels.

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All Events & Meetings