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Explosive Return

Dunnville Cutstone Company reopens historic quarry

By Jim Fine, Correspondent

Kneeling on a rock shelf over a freshly drilled bore hole, Aaron Koepple is in a careful hurry.

He’s being careful because he is connecting lengths of detonation cord with electrical tape. The hurry part comes from having promised his wife that he would be in the shower by 5 p.m. to take her out to dinner for their wedding anniversary that evening.

It’s now about 20 minutes to the appointed hour, and he has several more tape connections to make before setting off the blast that will separate this 10-foot slab of sandstone from the layer we are standing on.



Water shoots into the air as a crack is blasted in the sandstone at one of the quarries that operated more than 100 years ago. The quarry is now being operated by the Dunnville Cutstone Company. This is the only quarry not owned by the Department of Natural Resources. Joel Becker/Dunn County News

Koepple, 35, never had any aspirations, interests or dreams of running a stone quarry, even after he had bought one.

That was in 1999.

At the time, Koepple, a UW-Stout grad, and his family were living in Owatonna, Minn., when he decided to purchase a 62-acre parcel a few miles downriver from Downsville.

“I had enjoyed hunting on that land for years. It was just recreational land to me then,” he explained. “Shortly after that, Craig Thibado and I bought another 45 acres just to the south of the first parcel.”

It wasn’t until 2001 they discovered that there might be some real marketable value in the fine-grained sandstone that was still abundant on the property. Koepple says that a big part of the inspiration for reopening the quarry came when they learned that a church in Durand had been looking for stone of this color and type to match the original facade.

“But they went with another product because the natural stone had been bid too high,” he said.

Replace, restore and repair

Once word got out that Dunnville sandstone could become available again, more requests for the durable, buff-colored stone came in from architects and distributors both locally and in distant cities.

Some needed to match the look of original Dunnville stone in 100-year-old buildings. Sometimes, they just wanted a small piece to create components like window headers and sills. Others needed larger quantities to build additions.

As the opportunity to reopen the quarry materialized, Koepple liked the idea of building a business of his own.

“I am one of those people who doesn’t like working for someone else,” he admitted.

Drawing on his background in manufacturing engineering, he set out to teach himself a lot more about the architectural stone industry. He brought in some investors, researched the market — which, according to Koepple, has been on the upswing the past 10 years — and gained the necessary permits and approvals to form the Dunnville Cutstone Company in 2005.

Digging deeper

This was more than 60 years after regular quarrying operations had ceased. Koepple believes that the original quarries were closed as a result of shortages of men and materials during World War II.

“There were probably just not enough men around to work the quarry, plus there was a shortage of steel for the equipment it requires,” he theorized.

The historic quarry Koepple has reopened was originally one of four in the area. Known locally as Ulmer’s quarry, this one was the second to the last to close.

“Due to a fire, it was shut down as a dimensional stone quarry and then used as a rip-rap quarry for awhile,” he recalled. “The one to the north was the last to close. That one was part of the Downsville Stone Company. Now the DNR owns all the land the other quarries are on.”

It really was a blast

With the holes all filled, the detonation cord connected, and two warning hoots of the truck horn, it’s time for the payoff. The detonator is energized, and the resulting explosion shoots a string of geysers 40 feet into the air.

“All B-gel [a patented polymer gel], but no fly-rock,” Koepple emphasized. “All the force goes inward, expanding from hole to hole.”

Along with the earsplitting crack and boom of the blast, there was a concussion of air we could feel in our chests, even though we were a good 50 yards away.

“They can hear it in Downsville,” Koepple grinned, as they began packing up their gear.

Did he make it into the shower on time? Actually, he missed it by about 10 minutes, but not to worry, he’s used to loud noises.

Please CLICK HERE for part two of this article!
Dunnville Cutstone Company - E4862 170th Avenue, Menomonie, WI  54751 - Phone (715) 664-8386 / Fax (702) 543-5997 / E-mail dcc@dunnvillecutstone.com
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