Two days before Father's Day, Trisha Quinn faced the grim task of telling her nieces and nephews, aged six, 12, and 17, that their father would not be coming home. Timothy Quinn, 39, had worked at the Clairton Coke Works plant south of Pittsburgh for 18 years. Last August, he and colleague Steven Menefee were killed in an explosion at the facility, one of US Steel's largest production sites and the biggest coke plant in the western hemisphere.
“His girlfriend called me and said they couldn’t find him,” Trisha Quinn recalled. “There was absolutely no communication [from the company]. We were calling all the local hospitals; I put myself on the news, to look for him. Then I got told to contact someone in the union. Then some ladies from the company came out to my mom’s house to share the news that he was deceased.”
Nippon Steel had acquired US Steel for $14.9bn just months before the incident. The Japanese steelmaker had promised $11bn in upgrades to the acquired plants, but workers and residents say little has changed.
Fatal Explosion and Negligence Allegations
Quinn has since filed a wrongful death lawsuit against Nippon Steel and two other companies, alleging negligence. US Steel stated that during a cleaning operation, pressure built inside a gas valve, causing it to fail and triggering a series of explosions. According to the US Chemical Safety and Hazard Investigation Board, the cast iron valve that failed was manufactured in 1953—over 70 years old. US Steel reported annual revenue of more than $15bn.
“He was in there when the explosion occurred,” Trisha said. “It isn’t right, you’re at work, it’s not supposed to happen.”
Pollution and Health Concerns Persist
Despite pledging investment, Nippon Steel has made no effort to develop clean-fuel production at its three facilities in western Pennsylvania’s Mon Valley, one of the most polluted regions in the US for sulfur dioxide and hydrogen sulfide. Instead, the company plans to open a coal-free, integrated steel mill in Arkansas. US Steel says it aims to reach net zero by 2050.
In Braddock, a 14-mile drive down the Monongahela River, US Steel announced with fanfare that the 150-year-old Edgar Thomson Works would get a new hot strip mill. For locals, this means increased air pollution.
“They promised investment, it was supposed to be better. Us and Clairton have the worst air quality,” said Nathan Mallory, a North Braddock councilmember and resident. Mallory lives within earshot of the plant. More than 70% of Braddock’s population is Black, and the per capita income is just $15,500. Thousands live within a two-mile radius of the plant.
Mallory and other councilmembers claim they have been pressured by US Steel to vote on a resolution allowing a new sewer connector for the plant, without full disclosure of the mill project’s impacts.
“There has been years and years of citations [for pollution and other issues] under US Steel; there is this notion that it’s cheaper for US Steel to pay the health department citations … than it is to put containment equipment, a technology that does exist, on the existing blast furnaces or to replace them with something cleaner,” Mallory said. “We’re just fodder to the industry. It’s all corporation and government agreements. When you try to advocate [for the community], it’s all convoluted on purpose; it protects the industry over the people.”
Safety Protocols and Regulatory Fines
US Steel says its equipment is consistently refurbished and maintained. “We have strengthened several safety protocols based on the investigation results. Multi-disciplinary teams collaborated to establish standardized best practices for industrial valve cleaning to provide operational safety, prevent hazardous leaks, and maintain a controlled work environment,” a spokesperson wrote. “Employees have completed comprehensive training on these new program elements and procedural changes.”
However, in February, the US labor department cited US Steel and MPW Industrial Services Inc, fining them $118,214 and $61,473 respectively for exposing workers to unsafe conditions in the explosion that killed Quinn and Menefee. The department found: “United States Steel Corp. failed to use required safety management and energy control practices for hazardous work involving flammable gas.”
Menefee’s family has also filed a lawsuit alleging negligence against Nippon Steel, MPW Industrial Services Inc, and Valves Incorporated, the companies contracted for the work tied to the explosion. US Steel would not comment on whether it is compensating the families of the two victims but noted: “We continue to cooperate with relevant government agencies and hold the employees who were injured or lost during the August 11th incident in our thoughts.”
Broader Impact: Asthma and Future Jobs
Researchers warn that failing to invest in green-energy steel production in the Mon Valley could cost the region thousands of future jobs. Nippon’s planned $2.5bn investment in coal-fuel facilities risks the health of thousands of residents and workers for years.
“The responsibility for worker deaths, and the deaths of many community residents every year from pollution-related cancer, heart disease, and lung disease is rooted in US Steel’s dependence on coal-based technology, combined with a ‘drive it til the wheels fall off’ approach to managing this [Clairton Coke Works] facility,” said Matthew Mehalik, executive director of the Breathe Project. “The only way to ensure a long-term, safer, cleaner future for Mon Valley workers and fenceline community members is to replace coal-based steelmaking equipment with clean, coal-free, next-generation technology in well-maintained, new processes.”
Asthma rates among children living close to the plants are triple the national rate. Environmentalists say US Steel’s own reporting shows that a new hot strip mill would increase particle pollution in the area by up to 40%.
The explosion that killed Quinn and Menefee was not the only one at Clairton Coke Works last year. In February 2025, two workers were injured following a smokestack explosion. In September 2009, a maintenance worker was killed after a gas leak. Less than a year later, 15 workers suffered severe burns in another explosion at a coke oven. Following a fire in 2018, US Steel promised to spend $1bn across its three Mon Valley Works facilities to curb pollution, but within two years, that plan was shelved.
A Family’s Legacy Changed
For the Quinn family, whose fathers and sons worked more than 60 years in the steel industry, the meaning has shifted. “[Tim was] a second-generation steel worker. My dad worked there for 42 years. My brother enjoyed his work a lot,” said Trisha Quinn. Tim worked as a heater, monitoring temperatures at coke oven batteries that can reach 2,300F.
“His son wanted to be a steel worker, but we said, ‘No, that’s not an option.’” Trisha added, “I don’t want to jeopardize his life.”
