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

2022 Elections

Candidate Questionnaire Sent in Key Primary Races

To better inform citizens on issues related to quarries, aggregate production, and TCEQ, we developed and sent a candidate questionnaire to seven candidates running in the upcoming March 2022 primary elections.

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

TCEQ and Vulcan Filing Appeal of District Court Decision on Air Permit

TCEQ and Vulcan Construction Materials are filing an appeal attempting to overturn the decision rendered by District Court Judge Maya Guerra-Gamble vacating Vulcan’s air permit.

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

Important Quarry and APO Legislation Needs Your Support

Our top quarry and aggregate production operations (APO) bill (HB 4341) is stuck in the Environmental Regulation Committee. We need your help!

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All News Updates & Info

Events & Meetings

Preserve Our Hill Country Environment Bluebonnet Extravaganza Dinner & Auction - April 2, 2022 - Knibbe Ranch - Spring Branch, Texas

Bluebonnet Extravaganza Dinner & Auction

Saturday, April 2, 2022: Third annual fundraising dinner and auction in Spring Branch. Gourmet food, libations, music, dancing. 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 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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Adopt-a-Highway Litter Cleanup on FM 3009

Adopt-a-Highway Litter Cleanup

July 24, 2021: Please join us and help keep our adopted stretch of highway FM 3009 and our Texas Hill Country pristine!

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All Events & Meetings