Rocky Flats Nuclear Facility
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1957 Fire
Workers look at the burned out glovebox where the 1957 fire began on September 11. It was the first large conflagration at the Rocky Flats plant.
Fire damage in plutonium production building, 1969
This photo shows the detailed view of a glove box damaged in the 1969 fire, the largest and most dangerous fire in the plant's history.
Rocky Flats Nuclear Facility
Westward view of Rocky Flats Nuclear Facility, built northwest of Denver by the US government in 1951 to produce nuclear bomb cores. Rocky Flats operated in this capacity until it was decommissioned in 1991 following the end of the Cold War. During the 1980s it was found that toxic waste from the bomb core production process had been contaminating the surrounding environment for decades; cleanup began in the 1990s, and in 2007 the US Fish and Wildlife Service acquired the site, turning it into a national wildlife refuge.
Rocky Flats is a gravelly, narrow floodplain cut by gullies as it slopes from the Rocky Mountain foothills into the plains just northwest of Denver. Unlike many places, its name is known more for what was manufactured there than for its geology. Today it is a national wildlife refuge, but for nearly four decades it was a major hub in the nation’s nuclear weapons industrial complex.
Nuclear Facility
During the Cold War nuclear arms race that began after World War II, the US government in 1951 established a major nuclear weapons factory complex at Rocky Flats, located between Golden and Boulder just east of Highway 93. Its purpose was to process plutonium into metal and to manufacture plutonium bomb cores – the successors to the kind of fission bomb that destroyed the Japanese city of Nagasaki in 1945. Dow Chemical Corporation won the contract to operate the plant like a business, only this one was top secret.
With a workforce that often topped 5,000 during its four decades of production, Rocky Flats was one of the Denver area’s largest employers and over the years contributed billions of dollars to the local economies of Arvada and other suburbs in the west metro area. But the plant complex – consisting of eight major production buildings and several hundred support buildings, including a fire department – was dangerous, particularly for the men and women who worked in the production buildings. Because of the radioactive materials the plant worked with, it also posed a danger to the community – most vividly during a plutonium fire in 1969 that almost got out of control and would have contaminated the entire Denver area.
Rocky Flats was able to meet its main goal of producing plutonium bomb cores – 70,000 in all – to enable the US government to pursue a national security policy called deterrence. That risky policy holds that a country must build nuclear weapons of mass destruction to deter another country from using its own nuclear weapons out of fear of retaliation. While that policy is getting a second look today after significant reductions in nuclear arsenals it dominated the Cold War era and brought the world close to nuclear catastrophe during the 1962 Cuban Missile Crisis. Still, the work at Rocky Flats was deemed so important that in 1998 the site was added to the National Register of Historic Places for its historical significance to the United States. In 2005, following a $7 billion cleanup, most of the ten-square-mile site was designated a national wildlife refuge.
Plutonium Dangers
Rocky Flats contributed significantly to US history because the plant worked with one of the most important elements on Earth – plutonium. This heavy element is dangerous in any quantity. On the atomic level, plutonium 239, the main ingredient for bombs, is unstable and emits alpha particle radiation that can cause cancer by entering the body through inhalation or a wound. Rocky Flats machined plutonium and other material into hollow bomb cores about the size of misshapen grapefruits that weighed about six pounds each. The core was then surrounded with conventional explosives at a plant in Texas and made ready for a detonation that caused a nuclear chain reaction and an explosion equivalent to about 20,000 tons of TNT.
Originally stand-alone bombs like the one that destroyed Nagasaki, plutonium bombs soon came to be used to detonate much more powerful thermonuclear weapons. Officials often referred to these plutonium detonators as “triggers,” a euphemism that gave rise to the popular claim that Rocky Flats made “nuclear triggers,” a term that obscures the fact that the plant manufactured nuclear weapons of mass destruction.
Plutonium possesses some rare characteristics. It is one of only two elements (the other being uranium 235) whose nuclei can be split, or fissioned, with the resulting chain reactions creating tremendous explosions on the scale of Albert Einstein’s famous formula that E = MC² (energy equals mass times the speed of light squared). Another characteristic is that when plutonium burns, the ash it creates can be reprocessed, the proverbial phoenix from the ashes. And plutonium burned a lot at Rocky Flats, threatening both workers and the communities outside the plant. The reason is that in some forms – especially chips or flecks – plutonium is pyrophoric, meaning it ignites spontaneously in air. Documents show that the plutonium production areas at the factory experienced hundreds of fires over the years. Most were small and easily doused by workers.
The largest and most dangerous fire at the plant occurred on Mother’s Day in May 1969. Plutonium-flecked oily rags ignited spontaneously and the fire, by burning other flammable materials, spread throughout a cavernous production building containing 7,641 pounds of plutonium. Courageous firefighting and luck saved the building’s roof from burning through. General Edward Giller, a top Atomic Energy Commission official, reported to Congress in 1970 that the fire came close to contaminating hundreds of square miles. Had the fire been any bigger, he said, it may not have been containable.
Raid and Shutdown
Managers at Rocky Flats did not always follow the rulebook in making decisions. In 1952, for example, they settled a dispute with rancher Marcus Church by giving him keys to fence locks and allowing him to move cattle through the top-secret plant. “Cattle can’t talk,” one employee said, noting that Church only moved his cattle a few times. “Nobody said anything, although it didn’t get back to Washington, where they’d make a big deal out of it.” The Old West and the New West were making accommodations.
Other management decisions were not so humorous. Many had to do with the disposal of large amounts of nuclear and toxic chemical waste created during the production process. The plant’s top priority was producing bomb cores, so the waste that could not be shipped off the site immediately was simply buried or stored outside in ponds or in metal barrels that leaked. Such environmentally unsound practices in industries around the nation came under increasing scrutiny after the Environmental Protection Agency (EPA) was established in 1970. But weapons plants such as Rocky Flats claimed they were exempt from such jurisdiction because of the Atomic Energy Act of 1954.
That immunity argument worked until challenged in court during the mid-1980s, at about the same time whistleblowers informed FBI officials of potentially illegal practices at Rocky Flats. A whistleblower was also the source for newspaper stories in 1987 about a metal/woodworking shop at the plant making items for private use such as medallions, staircases, and foot massagers. An atmosphere of wrongdoing, along with reports from EPA regulators, contributed to the FBI-EPA raid on the plant on June 6, 1989, to find evidence of environmental crimes. This dramatic, if symbolic, raid occurred as the Cold War nuclear arms race was winding down and federal priorities were shifting toward environmental protection and away from nuclear weapons production. Indeed, in November 1989, five months after the raid and the same month the Berlin Wall fell, plutonium operations at Rocky Flats were halted.
A little more than two years later, President George H.W. Bush declared the plant’s weapons-making mission over, and cleanup began. The contaminated site was cleaned up enough so that most of the land was transferred from the US Department of Energy (DOE) to the US Fish and Wildlife Service as a national wildlife refuge in 2007. But DOE retained ownership of about 1,300 acres, 20 percent of the area, in the most contaminated central industrial section of the plant site. As of 2014, the refuge, with its planned biking and hiking trails, had not been opened to the public for what the US Fish and Wildlife Service said are financial reasons.
Legacies
The significance of the Rocky Flats complex can be seen largely through its legacies: the bombs it manufactured, its former workers, the environment, and the community. On a national level, the hollow plutonium bomb cores made at Rocky Flats are present in the US nuclear arsenal, which in 2014 amounted to 7,700 weapons (of the 17,300 nuclear weapons possessed by nine nations around the world, Russia has the largest number, with 8,500).
The US plutonium bombs were produced by the more than 20,000 men and women who worked at Rocky Flats over the years, some of them for decades. Most are proud of the work they did, although many were stung by antinuclear protestors outside the plant who called them names such as “murderers.” Many workers are happily retired, while others suffer from illnesses caused or suspected to have been caused by their former jobs. For example, chronic beryllium disease, similar to black lung disease, definitely killed or sickened a few hundred plant workers. Cancer, a disease whose origins are harder to pinpoint, has afflicted many workers – some of whom died while others continue to fight for health compensation.
It is clear from various studies that radiation contamination from Rocky Flats went off the site, but the significance is still disputed. On-site contamination is indisputable. Rockwell International Corporation took over from Dow in 1975 as the plant’s contractor. In 1992, following the FBI-EPA raid, Rockwell settled a criminal action proceeding by the government by pleading guilty to ten environmental crimes and agreeing to pay a fine of $18.5 million. Some members of the grand jury investigating the case, along with activists and other citizens, complained that the settlement was not tough enough.
The record shows that Rocky Flats was a secretive, dangerous industrial complex, particularly as it aged. By the 1980s, the major plutonium-processing building had far exceeded its designed lifetime. Publicity about the plant, both before and after the 1989 raid, made it seem sinister. Many people in nearby communities continue to wonder aloud whether radiation from the plant caused the illnesses or deaths of friends or relatives. State health department data, such as the cancer registry, do not support such fears, but they still persist. Uncertainty, risk, and evidence are weighed differently by various individuals and groups. For example, antinuclear activists often see danger because of the unknowns, while many officials see the available data and information as demonstrating that risks are negligible.
The debate over the health and danger of Rocky Flats is sure to continue now that the refuge is open to the public.
8th Grade
Rocky Flats is a gravelly, narrow floodplain cut by gullies as it slopes from the Rocky Mountain foothills into the plains just northwest of Denver. Unlike many places, its name is known more for what was manufactured there than for its geology. Today it is a national wildlife refuge, but for nearly forty years it was a major hub in the nation’s nuclear weapons industrial complex.
Nuclear Facility
Rocky Flats is located between Golden and Boulder just east of Highway 93. In 1951 the US government built a major nuclear weapons factory there. Its purpose was to process plutonium into metal and to make plutonium bomb cores. These bombs were similar to the kind of bomb that destroyed the Japanese city of Nagasaki in 1945. Dow Chemical Corporation won the contract to operate the plant like a business, only this one was top secret.
Rocky Flats was one of the Denver area’s largest employers, and over the years it added billions of dollars to the local economies of Arvada and other suburbs in the west metro area. But the plant complex – consisting of eight major production buildings and several hundred support buildings, including a fire department – was dangerous, particularly for the men and women who worked in the production buildings. Because of the radioactive materials the plant worked with, it also posed a danger to the community. A plutonium fire in 1969 almost got out of control and could have contaminated the entire Denver area.
Rocky Flats could meet its main goal of producing plutonium bomb cores, 70,000 in all, enabling the US government to pursue a national security policy called deterrence. That risky policy says that a country must build nuclear weapons of mass destruction to deter (prevent) another country from using its own nuclear weapons out of fear of revenge. That policy dominated the Cold War era and brought the world close to nuclear disaster during the 1962 Cuban Missile Crisis. The work at Rocky Flats was thought to be so important that in 1998 the site was added to the National Register of Historic Places for its historical significance to the United States. In 2005 most of the ten-square-mile site was designated a national wildlife refuge.
Plutonium Dangers
Rocky Flats contributed significantly to US history because the plant worked with one of the Earth’s rare radioactive elements – plutonium. This heavy element is dangerous in any quantity. On the atomic level, plutonium 239, the main ingredient for bombs, is unstable and emits alpha particle radiation that can cause cancer by entering the body through inhalation or a wound.
Plutonium bombs soon came to be used to detonate much more powerful thermonuclear weapons. Officials often referred to these plutonium detonators as “nuclear triggers,” a term that hides the fact that the plant manufactured nuclear weapons of mass destruction.
Plutonium has some unusual characteristics. It is one of only two elements (the other being uranium 235) whose nuclei can be split, with the resulting chain reactions creating huge explosions. Another characteristic is that when plutonium burns, the ash it creates can be reused. Plutonium was burned a lot at Rocky Flats, threatening both workers and the communities outside the plant. The reason is that in some forms – especially chips or flecks – plutonium ignites suddenly in air. Documents show that the plutonium production areas at the factory experienced hundreds of fires over the years. Most were small and easily put out by workers.
The largest and most dangerous fire at the plant occurred on Mother’s Day in May 1969. Plutonium-flecked oily rags ignited suddenly and the fire spread throughout the huge production building containing 7,641 pounds of plutonium. Courageous firefighting and luck saved the building’s roof from burning through. General Edward Giller, a top Atomic Energy Commission official, reported to Congress in 1970 that the fire came close to contaminating hundreds of square miles. Had the fire been any bigger, he said, it might not have been contained.
Raid and Shutdown
Managers at Rocky Flats did not always follow the rulebook in making decisions. Many had to deal with the disposal of large amounts of nuclear and toxic chemical waste created during the production process. The plant’s top priority was producing bomb cores, so the waste that could not be shipped off the site immediately was simply buried or stored outside in ponds or in metal barrels that leaked. Such environmentally unsound practices in industries around the nation came under increased scrutiny after the Environmental Protection Agency (EPA) was established in 1970. Weapons plants such as Rocky Flats claimed they were exempt from such jurisdiction because of the Atomic Energy Act of 1954.
In 1991 President George H.W. Bush declared the plant’s weapons-making mission over, and cleanup began. The contaminated site was cleaned up enough so that most of the land was transferred from the US Department of Energy (DOE) to the US Fish and Wildlife Service as a national wildlife refuge in 2007. But DOE retained ownership of about 1,300 acres, 20 percent of the area, in the most contaminated section of the site. The refuge plans to open to the public in late 2017 with biking and hiking trails and a visitor center.
Legacies
The significance of the Rocky Flats complex can be seen largely through its legacies: the bombs it manufactured and the effect it had on its former workers, the environment, and the community. On a national level, the hollow plutonium bomb cores made at Rocky Flats are present in the US nuclear arsenal.
The US plutonium bombs were produced by the more than 20,000 men and women who worked at Rocky Flats over the years, some of them for decades. Most are proud of the work they did. Many workers are happily retired, while others suffer from illnesses caused or suspected to have been caused by their former jobs. Chronic beryllium disease, which is similar to black lung disease, killed or sickened a few hundred plant workers. Cancer, a disease whose origins are harder to pinpoint, has afflicted many workers – some of whom died while others continue to fight for health compensation.
It is clear from various studies that radiation pollution from Rocky Flats went off the site, but the significance of this is still disputed. On-site pollution, however, is indisputable. Rockwell International Corporation took over from Dow in 1975 as the plant’s contractor.
The record shows that Rocky Flats was a secretive, dangerous industrial complex, particularly as it aged. By the 1980s, the major plutonium-processing building had far exceeded its expected lifetime. Many people in nearby communities continue to wonder whether radiation from the plant caused the illnesses or deaths of friends or relatives. State health department data, such as the cancer registry, do not support such fears, which persist. Uncertainty, risk, and evidence are weighed differently by various individuals and groups. For example, antinuclear activists often see danger because of the unknowns, while many officials see the available data and information as evidence that risks are negligible. The debate is sure to continue after the national wildlife refuge is opened to the public.
4th Grade
Rocky Flats is a gravelly, narrow floodplain cut by gullies as it slopes from the Rocky Mountain foothills into the plains just northwest of Denver. Unlike many places, its name is known more for what was made there than for its geology. Today it is a national wildlife refuge, but for nearly forty years it was a major hub in the nation’s nuclear weapons industrial complex.
Nuclear Facility
Rocky Flats is located between Golden and Boulder just east of Highway 93. In 1951 the US government started a major nuclear weapons factory center there. Its purpose was to process plutonium into metal and to make plutonium bomb cores.
Rocky Flats was one of the Denver area’s largest employers. Over the years, it added billions of dollars to the local economies of Arvada and other suburbs in the west metro area. But the plant was dangerous, mainly for the men and women who worked in the production buildings. The radioactive materials in the plant also posed a danger to the community. A plutonium fire in 1969 almost got out of control and could have contaminated the entire Denver area.
The work at Rocky Flats was viewed as so important that in 1998, the site was added to the National Register of Historic Places for its historical significance to the United States. In 2005 most of the ten-square-mile site became a national wildlife refuge.
Plutonium Dangers
Rocky Flats was important to US history because the plant worked with plutonium. This heavy element is dangerous in any amount. The type of plutonium used in bombs releases radiation that can cause cancer.
Plutonium is one of only two elements (the other being uranium 235) whose center can be split, creating huge explosions. Another characteristic is that when plutonium burns, the ash it creates can be reused. Plutonium burned a lot at Rocky Flats, threatening both workers and the communities outside the plant. The reason is that in some forms plutonium can burn unexpectedly in air. Documents show that the plutonium production areas at the factory suffered hundreds of fires over the years. Most were small and easily put out by workers.
The largest and most dangerous fire at the plant took place on Mother’s Day in May 1969. Brave firefighters and luck saved the building’s roof from burning through. Had the fire been any bigger, it might not have been kept in check.
Raid and Shutdown
In 1991 President George H.W. Bush declared the plant’s weapons-making mission over, and cleanup began. The dirty site was cleaned up enough so that most of the land was transferred to the US Fish and Wildlife Service as a national wildlife refuge in 2007. The refuge plans to open to the public in late 2017 with a visitor center and biking and hiking trails.
Legacies
The significance of the Rocky Flats complex can be seen largely through its legacies: the bombs it manufactured and the effect it had on its former workers, the environment, and the community. On a national level, the hollow plutonium bomb cores made at Rocky Flats are present in the United States’ nuclear weapons.
The US plutonium bombs were produced by the more than 20,000 men and women who worked at Rocky Flats over the years. Many workers are happily retired, while others suffer from illnesses caused or thought to have been caused by their former jobs.
The record shows that Rocky Flats was a secret, dangerous business complex, particularly as it got older. By the 1980s, the major plutonium-processing building had gone far beyond its lifetime. Many people in nearby communities continue to wonder whether radiation from the plant caused the illnesses or deaths of friends or relatives. State health department data do not support such fears.