Oak Ridge Today

K-25 Building demolition nears completion

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K-25 Building Demolition

Workers continue demolishing and hauling away debris at the K-25 Building. (Photo courtesy U.S. Department of Energy/UCOR)

Demolition of the last standing section of the K-25 Building at the East Tennessee Technology Park is more than 75 percent complete.

UCOR workers began tearing down the last six units in the east wing of the mile-long Manhattan Project-era gaseous diffusion building in September. The majority of those six units—4.5 of them—are already on the ground, and work is continuing at a steady pace, the U.S. Department of Energy Oak Ridge Office reported in the December issue of Public Involvement News.

The entire project, including waste removal, should be completed next year, the Oak Ridge Office said.

The historic, U-shaped K-25 Building was erected to enrich uranium for atomic bombs during World War II, and it was once the world’s largest building under one roof. It once had 54 units. [Read more…]

Wilcox never gave up on plan to preserve K-25 history, former DOE manager says

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K-25 Building Aerial View

Now mostly demolished, the former mile-long, U-shaped K-25 Building is pictured above. Bill Wilcox, a former technical director at K-25 and the Y-12 National Security Complex, led the fight to preserve K-25’s history. Wilcox died Monday, Sept. 2, and his funeral was Saturday. (Photo courtesy of U.S. Department of Energy)

The fight to preserve the history of the K-25 site in west Oak Ridge was long and arduous. Among the challenges were federal funding battles and deteriorated building conditions.

Other people might have considered the dilapidated K-25 Building, once the world’s largest building under one roof, a “useless hulk,” one friend and colleague said. But historic preservationist Bill Wilcox, who died Monday evening, never gave up on his dream of honoring the site’s history.

Now mostly demolished, the mile-long, U-shaped K-25 Building was erected as part of the top-secret Manhattan Project. That was a federal program to build the world’s first atomic bombs during World War II. But the four-story building has been shut down since 1964 and fallen into disrepair, and the U.S. Department of Energy is converting the site into a massive industrial park and demolishing many of the original buildings. [Read more…]

Transite panels being removed from last part of K-25 Building

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K-25 Transite Removal

More than 2,800 transite panels will be removed from the remainder of the K-25 Building. (Submitted photo)

A federal cleanup contractor in Oak Ridge is removing exterior panels known as transite panels from the last part of the K-25 Building that is still standing.

K-25 was built to enrich uranium for atomic bombs during World War II and was once the world’s largest building under one roof. It’s been unused for decades and is being torn down.

Most of the mile-long former gaseous diffusion building, located at East Tennessee Technology Park, has been demolished. About two million square feet of the U-shaped building have been removed, according to a Thursday press release from UCOR, the cleanup contractor for the U.S. Department of Energy in Oak Ridge. [Read more…]

Removal of K-25 north end demolition debris almost complete

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K-25 North End Demolition

With the north end demolished, only a small part of the east wing remains at the once-massive K-25 Building in west Oak Ridge. (Submitted photo)

Workers are almost done removing demolition debris from the K-25 Building’s north end.

Only a small section of the giant building’s east wing remains. It is contaminated with technetium-99, a slow-decaying radioactive isotope. Further deactivation of that section is needed before demolition can begin, according to a recent article in “Public Involvement News,” published by the U.S. Department of Energy Oak Ridge Office. [Read more…]

Video: K-25 North End Demolition

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It took about 20 minutes to demolish the last section of the North End of the historic K-25 Building in west Oak Ridge on Wednesday morning. Shut down for several decades, K-25 was built to enrich uranium during World War II as part of the top-secret Manhattan Project, and it was once the world’s largest building under one roof.

Watch the last section of the North End crash to the ground in this video:

Demolition finished on K-25’s North End

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K-25 North End Demolition

Work crews demolish the last section of the North End of the historic K-25 Building in Oak Ridge on Wednesday. K-25 was built to enrich uranium during World War II and was once the world’s largest building under one roof.

Work crews demolished the last section of the North End of the historic K-25 Building in Oak Ridge on Wednesday morning.

Workers used a giant, orange demolition machine known as a high reach shear to bring down the four-story building, once the world’s largest under one roof. At times, the shear resembled a large dinosaur as its massive black jaws bit into the building’s 67-year-old skeleton.

Reporters, officials, and workers watched on a clear but chilly East Tennessee morning as the high reach shear sliced through vertical steel columns and tugged at horizontal beams. After about 20 minutes, the North End crashed to the ground. So did any dreams of preserving it that might have remained.

[Read more…]

Demolition starts on K-25’s north end

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K-25 North End Demolition

Demolition started Wednesday on the north end of the mile-long, U-shaped K-25 Building in west Oak Ridge. (Photo submitted by UCOR)

Demolition work started Wednesday on the north end of the K-25 Building at the East Tennessee Technology Park in west Oak Ridge.

The building was constructed to enrich uranium during World War II as part of the top-secret Manhattan Project, and it was once the world’s largest building under one roof.

Previous plans had called for the north end of the mile-long, U-shaped building to be preserved for historic purposes. But an agreement signed this summer by federal, state, and local historic preservation groups allowed for the entire building to be demolished, including the north end, while still recognizing the historic significance of the site.

Demolition of the building’s east and west wings is complete, except for a small section of the east wing that has technetium-99, or Tc-99, a slow-decaying radioactive metal, according to a Wednesday press release from UCOR, the U.S. Department of Energy’s cleanup contractor in Oak Ridge. The north end forms the base of the “U” and is the smallest of the three sections.

“This is a tremendous day for employees,” said Leo Sain, UCOR president and project manager. “We have been working toward this since we arrived at ETTP, and it’s a testament to people here, at the Department of Energy, and at all the agencies who worked together to make this happen.”

DOE’s Oak Ridge Office of Environmental Management, or EM, expects the north end demolition to be complete in January. After that, workers will continue pre-demolition activities in the remaining Tc-99 area of K-25’s east wing, the release said.

“Completing demolition of the K-25 Building is our highest priority, and this is another significant step toward that goal,” said Mark Whitney, Oak Ridge’s EM manager.

The preservation agreement approved this summer calls for a replica equipment building and viewing tower, proposes a history center at a city-owned fire station at ETTP, and provides a $500,000 grant for the run-down Alexander Inn in central Oak Ridge.

During the decade-long discussion over preserving the north end, federal officials had expressed concerns about safety, the deteriorated condition of the building, and the cost of trying to keep that section.

Contractor completes K-25 east wing demolition, moves to north end

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K-25 East Wing Demolition

Workers wrap up the demolition of the K-25 east wing, pictured at left, in this Sept. 5 photo. The north end is in the foreground. (Photo submitted by UCOR)

One month after a historic preservation agreement was signed, a federal cleanup contractor announced Friday that it has completed demolition work on the east wing of the K-25 Building and is preparing to demolish the north end.

Historic preservationists had lobbied for years to save the north end, but its deteriorated condition made that option unfeasible, a press release said.

[Read more…]