Today’s batch of burning questions, my smart-aleck answers and the real deal:
Question: I frequently Drive on Smokey Park Highway. There is an open pit gravel mine called Vulcan. There always seems to be trucks and train car loads of gravel being removed from that facility. How long has it been there? What is the expected life of the mine? What is the volume of material that has been removed from that facility?
My answer: I don't know, but I hear it's a gneiss place to work.
Real answer: This is one of those places you drive past a thousand times and don't really think about, so I admit I found these answers pretty fascinating.
Denise Hallett, a spokeswoman for Vulcan Materials Co., sent me a fact sheet about the Enka quarry, as well as some other points of interest.
The operations at Enka began in the 1960s and the tract includes 288 acres, with a 50-foot buffer around the perimeter. It employs 21 people.
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The type of stone mined is indeed gneiss, a type of granite, which explains my unfortunate joke above.
"The quarry supplies a wide variety of crushed stone products for use in making concrete and asphalt, as well as for direct use in roads, bridges, and other public infrastructure projects, not to mention commercial and residential construction," the fact sheet notes.
You've certainly seen this type of gneiss all over, whether in larger rip rap or either in or on roads. It typically has a gray, banded appearance.
Fun fact from the fact sheet: "Enka Quarry is one of the few Mideast quarries that ships products to our customers via railroad and supplies ballast to the railroads to maintain their tracks." So there's another place you've seen this rock — railroad beds.
The quarry is also open for sales to the public.
Hallett said the quarry's lifespan will depend on demand for construction materials. The Enka site has been producing about 400,000 tons of material a year, on average.
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"The life of a quarry depends on community demand and the amount of land available at the site," Hallett said. "Our Enka Quarry has been operating since the 1960's, and we hope to continue our partnership in the community for 50-100 years, serving many generations to come!"
She also offered more detail about all the uses of the rock.
"The products consist of erosion control rocks (called "Rip Rap"), railroad ballast, asphalt and concrete stone, foundation material (commonly called "crusher run" or ABC- Aggregate Base Course) for roads, homes, schools, retail, etc...; utility foundation material, walking trails, driveways, and more!" Hallett said.
Here's something I did not know: Asphalt is about 95 percent crushed stone, concrete about 80 percent.
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One more fun fact: Enka Quarry is certified as a wildlife site by the Wildlife Habitat Council.
Hey, I know some locals don't like quarries at all, and yes, they do leave a scar on the land. But they also provide a product we all need.
While the reader didn't ask what will happen with the site when it does run out of material one day, Hallett answered that question anyway.
"Before we can ever receive a permit to operate a quarry, we must submit a 'Reclamation Plan' hat shows what the property will be once the life of the mine has been reached," Hallett said. "There are many uses for a quarry site after the mining is complete, ranging from a fresh water reservoir to community parks."
As an example, she cited Winston-Salem, where Vulcan's Piedmont Quarry site was donated to the city in 1998 and is now Quarry Park, "which has a unique cantilever walkway that juts out over the old pit that has now filled with water.
"The panoramic view of the area is spectacular and there are a number of greenway trails linking the park to the city's greenway system," Hallett said.
For more information on that park, visit www.cityofws.org/quarrypark
"The point here is that a quarry is an asset to the local community while it is in operation and it will continue to be an asset when the operation is complete," she said.
Learn more about Vulcan here: www.vulcanmaterials.com/
And, ahem, rock on!
This is the opinion of John Boyle. Contact him at 828-232-5847 or [email protected]
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