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

2022 candidates for Texas State Representative, House District 73: Justin Calhoun, Barron Casteel, George Green, Carrie Isaac

State Representative, District 73 Voter Guide


Justin Calhoun, Barron Casteel, George Green, and Carrie Isaac are candidates for Texas State Representative, House District 73, in the 2022 primaries. Voter guide and candidate questionnaire responses.

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2022 candidates for Texas State Senate District 25: Channon Cain, Donna Campbell, Robert Walsh. (Courtesy candidate Facebook pages)

State Senate District 25 Voter Guide


Channon Cain, Donna Campbell, and Robert Walsh are candidates for Texas State Senate District 25, in the 2022 primary elections. Voter guide and candidate questionnaire responses.

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2022 Elections

Elected Officials Quiz


How much do you really know about your elected officials in Texas? Before you go to the polls, have a little fun with our interactive quiz! You might even learn something new!

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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. Fabulous Texas BBQ, local 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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