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This photograph taken in 1997 shows one of the two entrances to T building on the grounds of Mound Lab in Miamisburg. The building, five stories underground (the newer building on the left is about five stories), is where Monsanto Chemical developed triggering device for the atomic bomb during World War II. This entrance is at the top of the secret installations that was built by carving out the earth on the other side of this hill, building the building and then packing the dirt back around it. FILE PHOTO

This photograph taken in 1997 shows one of the two entrances to T building on the grounds of Mound Lab in Miamisburg. The building, five stories underground (the newer building on the left is about five stories), is where Monsanto Chemical developed triggering device for the atomic bomb during World War II. This entrance is at the top of the secret installations that was built by carving out the earth on the other side of this hill, building the building and then packing the dirt back around it. FILE PHOTO
Miamisburg
By
Oct 30, 2018
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A heavily-fortified underground concrete building where nuclear weapons materials were processed during the Cold War has been sold.

Mound Business Park officials said the sale of the 122,000 square foot facility, which records show is an “underground, bomb shelter-type” structure, closed Friday.

Patriot Communications has been negotiating to buy the 4.26-acre site constructed in the 1940s, Miamisburg records show. The building was where the “purification of polonium-210 for use in nuclear weapons” occurred when the Mound Laboratory occupied the 306-acre business park when it was a federal defense research facility, according to the Library of Congress website.

RELATED: Unique building that can ‘take a cruise missile strike’ about to change hands

Terms of the deal were not immediately available. The Miamisburg company specializes in marketing and managing client structures for wireless, broadband, and narrowband applications, according to its website.

Known as the T Building at the Mound Advanced Technology Center, the underground structure at 945 Capstone Drive features “reinforced concrete construction with a 15-foot thick roof, 16-foot thick walls, and built on an eight-foot thick slab,” federal records show.

RELATED: Mound Business Park plan likened to Austin district near I-75

The company specializes in manufacturing communications-related equipment and plans bring 12 jobs to the park, “but then growing substantially past that as they build out and do remodeling,” Mound Development Corp. President Eric Cluxton has said.

“It’s a very, very strong structure. It’s an unbelievable building,” Cluxton said of the site, which Miamisburg City Planner Ryan Homsi said he has been told still has “some glass doors that can take cruise missile strikes.”

-MORE COVERAGE ON THIS ISSUE:

RELATED: The history of the Mound Advanced Technology Center

RELATED: Marker pays tribute to Mound top-secret Cold War research

RELATED: Miamisburg offers tax incentive package for jobs at Mound

RELATED: Transfer of Miamisburg land will expand Mound Business Park

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Nick Blizzard is a staff writer for the Dayton Daily News. He is a graduate of Stebbins High School who earned a bachelor’s degree from Ohio University and its E.W. Scripps School of Journalism. Nick is a Riverside native and has been a journalist in the Dayton area for more than 20 years.